The Vigil@nce team watches public vulnerabilities impacting your computers, and then offers security solutions, a database and tools to fix them.

Computer vulnerabilities of SSL protocol

vulnerability bulletin CVE-2016-2183 CVE-2016-6329

Blowfish, Triple-DES: algorithms too weak, SWEET32

Synthesis of the vulnerability

An attacker can create a TLS/VPN session with a Blowfish/Triple-DES algorithm, and perform a two days attack, in order to decrypt data.
Impacted products: Avaya Ethernet Routing Switch, Blue Coat CAS, ProxySG par Blue Coat, SGOS by Blue Coat, Cisco ASR, Cisco Aironet, Cisco ATA, Cisco AnyConnect Secure Mobility Client, Cisco ACE, ASA, AsyncOS, Cisco Catalyst, Cisco Content SMA, Cisco ESA, IOS by Cisco, IOS XE Cisco, IOS XR Cisco, Cisco IPS, Nexus by Cisco, NX-OS, Cisco Prime Access Registrar, Prime Collaboration Assurance, Cisco Prime DCNM, Prime Infrastructure, Cisco Prime LMS, Cisco Router, Secure ACS, Cisco CUCM, Cisco Manager Attendant Console, Cisco Unified CCX, Cisco IP Phone, Cisco MeetingPlace, Cisco Wireless IP Phone, Cisco WSA, Cisco Wireless Controller, Debian, Avamar, Black Diamond, ExtremeXOS, Summit, BIG-IP Hardware, TMOS, Fedora, FileZilla Server, FortiAnalyzer, FortiAnalyzer Virtual Appliance, FortiGate, FortiGate Virtual Appliance, FortiOS, FreeRADIUS, hMailServer, HPE BSM, LoadRunner, HP Operations, Performance Center, Real User Monitoring, SiteScope, HP Switch, HP-UX, AIX, DB2 UDB, Informix Server, IRAD, Security Directory Server, Tivoli Directory Server, Tivoli Storage Manager, Tivoli System Automation, WebSphere MQ, Junos Space, McAfee Email Gateway, ePO, Data ONTAP, Snap Creator Framework, Nodejs Core, OpenSSL, openSUSE, openSUSE Leap, Oracle Communications, Oracle DB, Oracle Directory Server, Oracle Directory Services Plus, Oracle Fusion Middleware, Oracle GlassFish Server, Oracle Identity Management, Oracle iPlanet Web Server, Oracle OIT, Solaris, Tuxedo, Oracle Virtual Directory, WebLogic, Oracle Web Tier, SSL protocol, Pulse Connect Secure, Pulse Secure Client, Pulse Secure SBR, RHEL, JBoss EAP by Red Hat, SAS Add-in for Microsoft Office, SAS Analytics Pro, Base SAS Software, SAS Enterprise BI Server, SAS Enterprise Guide, SAS Management Console, SAS OLAP Server, SAS SAS/ACCESS, SAS SAS/AF, SAS SAS/CONNECT, SAS SAS/EIS, SAS SAS/ETS, SAS SAS/FSP, SAS SAS/GRAPH, SAS SAS/IML, SAS SAS/OR, SAS SAS/STAT, SAS SAS/Web Report Studio, Slackware, Splunk Enterprise, stunnel, SUSE Linux Enterprise Desktop, SLES, Synology DS***, Synology RS***, Nessus, Ubuntu, WinSCP.
Severity: 1/4.
Consequences: data reading.
Provenance: internet client.
Number of vulnerabilities in this bulletin: 2.
Creation date: 25/08/2016.
Identifiers: 1610582, 1991866, 1991867, 1991870, 1991871, 1991875, 1991876, 1991878, 1991880, 1991882, 1991884, 1991885, 1991886, 1991887, 1991889, 1991892, 1991894, 1991896, 1991902, 1991903, 1991951, 1991955, 1991959, 1991960, 1991961, 1992681, 1993777, 1994375, 1995099, 1995922, 1998797, 1999054, 1999421, 2000209, 2000212, 2000370, 2000544, 2001608, 2002021, 2002335, 2002336, 2002479, 2002537, 2002870, 2002897, 2002991, 2003145, 2003480, 2003620, 2003673, 2004036, 2008828, 523628, 9010102, bulletinapr2017, c05349499, c05369403, c05369415, c05390849, CERTFR-2017-AVI-012, CERTFR-2019-AVI-049, cisco-sa-20160927-openssl, cpuapr2017, cpujan2018, cpujul2017, cpuoct2017, CVE-2016-2183, CVE-2016-6329, DSA-2018-124, DSA-3673-1, DSA-3673-2, FEDORA-2016-7810e24465, FEDORA-2016-dc2cb4ad6b, FG-IR-16-047, FG-IR-16-048, FG-IR-17-127, FG-IR-17-173, HPESBGN03697, HPESBGN03765, HPESBUX03725, HPSBGN03690, HPSBGN03694, HPSBHF03674, ibm10718843, java_jan2017_advisory, JSA10770, KM03060544, NTAP-20160915-0001, openSUSE-SU-2016:2199-1, openSUSE-SU-2016:2391-1, openSUSE-SU-2016:2407-1, openSUSE-SU-2016:2496-1, openSUSE-SU-2016:2537-1, openSUSE-SU-2017:1638-1, openSUSE-SU-2018:0458-1, RHSA-2017:0336-01, RHSA-2017:0337-01, RHSA-2017:0338-01, RHSA-2017:3113-01, RHSA-2017:3114-01, RHSA-2017:3239-01, RHSA-2017:3240-01, RHSA-2018:2123-01, SA133, SA40312, SB10171, SB10186, SB10197, SB10215, SOL13167034, SP-CAAAPUE, SPL-129207, SSA:2016-266-01, SSA:2016-363-01, SUSE-SU-2016:2387-1, SUSE-SU-2016:2394-1, SUSE-SU-2016:2458-1, SUSE-SU-2016:2468-1, SUSE-SU-2016:2469-1, SUSE-SU-2016:2470-1, SUSE-SU-2016:2470-2, SUSE-SU-2017:1444-1, SUSE-SU-2017:2838-1, SUSE-SU-2017:3177-1, SWEET32, TNS-2016-16, USN-3087-1, USN-3087-2, USN-3270-1, USN-3339-1, USN-3339-2, USN-3372-1, VIGILANCE-VUL-20473.

Description of the vulnerability

The Blowfish and Triple-DES symetric encryption algorithms use 64 bit blocks.

However, if they are used in CBC mode, a collision occurs after 785 GB transferred, and it is then possible to decrypt blocks with an attack lasting two days.

An attacker can therefore create a TLS/VPN session with a Blowfish/Triple-DES algorithm, and perform a two days attack, in order to decrypt data.
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computer vulnerability bulletin 20428

HTTP: Man-in-the-Middle via Proxy CONNECT

Synthesis of the vulnerability

An attacker can act as a Man-in-the-Middle when an HTTP proxy is configured, in order to obtain passwords of users of this proxy.
Impacted products: HTTP protocol, SSL protocol.
Severity: 1/4.
Consequences: data reading, data creation/edition.
Provenance: intranet server.
Creation date: 18/08/2016.
Identifiers: FalseCONNECT, VIGILANCE-VUL-20428, VU#905344.

Description of the vulnerability

When an HTTP proxy is configured, the web browser uses the HTTP CONNECT method to ask the proxy to setup a secured TLS session.

However, the HTTP CONNECT query and its reply are sent in a clear HTTP session. An attacker can act as a Man-in-the-Middle, and spoof a 407 Proxy Authentication reply to the client. The victim then sees an authentication windows, and may enter his password, which is sent to the attacker's server.

It can be noted that this vulnerability impacts all session types requested to the proxy, but as the victim requests an https/TLS url, he expects his session to be encrypted. It is thus a perception problem, instead of a real new vulnerability.

An attacker can therefore act as a Man-in-the-Middle when an HTTP proxy is configured, in order to obtain passwords of users of this proxy.
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computer vulnerability bulletin 18648

TLS: obtaining data size via HTTPS Bicycle

Synthesis of the vulnerability

An attacker can analyze TLS sessions using the GCM mode, in order to guess the size of confidential data sent.
Impacted products: SSL protocol.
Severity: 2/4.
Consequences: data reading.
Provenance: LAN.
Creation date: 06/01/2016.
Identifiers: VIGILANCE-VUL-18648.

Description of the vulnerability

The TLS protocol supports several "ciphers". For example:
 - ECDHE-ECDSA-AES256-GCM-SHA384
 - ECDHE-RSA-AES256-GCM-SHA384
 - ECDHE-ECDSA-AES256-SHA384
 - ECDHE-RSA-AES256-SHA384

Those containing "GCM", use the Galois/Counter Mode, which is a stream cipher (and not a block cipher). The size of the encrypted message is thus the same as the size of the clear message. This property (weakness) is known since several years. Note: RC4 is also a stream cipher, but its usage is now not recommended.

However, if the attacker captures TLS packets, and knows a part of the clear message, he can deduce the length of unknown data. For example, the attacker can go to the authentication page of a web service with the same browser than the victim, in order to know the length of HTTP headers which are usually sent in the TLS session. Then, if he captures the victim's TLS session, he can obtain the size of data sent in the authentication form, and thus guess the size of his password.

An attacker can therefore analyze TLS sessions using the GCM mode, in order to guess the size of confidential data sent.
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computer vulnerability alert CVE-2015-5738

RSA: private key computation via CRT

Synthesis of the vulnerability

An attacker can exchange with an application not implementing the RSA-CRT protection, in order to progressively guess the private key.
Impacted products: FortiGate, FortiGate Virtual Appliance, FortiOS, Java OpenJDK, openSUSE, Java Oracle, JavaFX, SSL protocol, Unix (platform) ~ not comprehensive.
Severity: 2/4.
Consequences: data reading.
Provenance: internet client.
Creation date: 08/09/2015.
Identifiers: cpuapr2015, CVE-2015-5738, openSUSE-SU-2015:1596-1, RSA-CRT, VIGILANCE-VUL-17836.

Description of the vulnerability

An implementation of the RSA algorithm can use the CRT (Chinese Remainder Theorem) optimization, so computations are faster. However, the RSA-CRT signature is affected by a side-channel attack, known since 1996 (Arjen Lenstra). OpenSSL and NSS are for example protected.

The GnuPG software is protected, but the Libgcrypt library is not. An attacker can therefore exchange with an application linked to Libgcrypt, to trigger a series of error and attack RSA-CRT, in order to progressively guess the private key.

The TLS protocol can use the Perfect Forward Secrecy. In this case, a RSA signature is used. However, several implementations, such as OpenJDK or JRE, do not have the RSA-CRT protection. An attacker can therefore exchange with a TLS server with the Perfect Forward Secrecy enabled, to trigger a series of error and attack RSA-CRT, in order to progressively guess the private key.

An attacker can therefore exchange with an application not implementing the RSA-CRT protection, in order to progressively guess the private key.
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vulnerability CVE-2015-4000

TLS: weakening Diffie-Hellman via Logjam

Synthesis of the vulnerability

An attacker, located as a Man-in-the-Middle, can force the TLS client/server to accept a weak export algorithm, in order to more easily capture or alter exchanged data.
Impacted products: Apache httpd, Blue Coat CAS, ProxyAV, ProxySG par Blue Coat, SGOS by Blue Coat, DCFM Enterprise, Brocade Network Advisor, Brocade vTM, Clearswift Email Gateway, Debian, Summit, Fedora, FileZilla Server, FreeBSD, HPE BSM, HPE NNMi, HP Operations, HP-UX, AIX, DB2 UDB, IRAD, Security Directory Server, SPSS Modeler, Tivoli Storage Manager, Tivoli System Automation, Tivoli Workload Scheduler, WebSphere AS Traditional, WebSphere MQ, Juniper J-Series, Junos OS, Junos Pulse, Juniper Network Connect, Juniper SBR, lighttpd, ePO, Firefox, NSS, MySQL Community, MySQL Enterprise, Data ONTAP, Snap Creator Framework, SnapManager, NetBSD, nginx, Nodejs Core, OpenSSL, openSUSE, openSUSE Leap, Solaris, Palo Alto Firewall PA***, PAN-OS, Percona Server, RealPresence Collaboration Server, RealPresence Distributed Media Application, RealPresence Resource Manager, Polycom VBP, Postfix, SSL protocol, Pulse Connect Secure, Puppet, RHEL, JBoss EAP by Red Hat, Sendmail, Slackware, SUSE Linux Enterprise Desktop, SLES, Synology DS***, Synology RS***, Ubuntu, WinSCP.
Severity: 2/4.
Consequences: data reading, data creation/edition.
Provenance: internet server.
Creation date: 20/05/2015.
Revision date: 20/05/2015.
Identifiers: 1610582, 1647054, 1957980, 1958984, 1959033, 1959539, 1959745, 1960194, 1960418, 1960862, 1962398, 1962694, 1963151, 9010038, 9010039, 9010041, 9010044, BSA-2015-005, bulletinjan2016, bulletinjul2015, c04725401, c04760669, c04767175, c04770140, c04773119, c04773241, c04774058, c04778650, c04832246, c04918839, c04926789, CERTFR-2016-AVI-303, CTX216642, CVE-2015-4000, DLA-507-1, DSA-3287-1, DSA-3300-1, DSA-3688-1, FEDORA-2015-10047, FEDORA-2015-10108, FEDORA-2015-9048, FEDORA-2015-9130, FEDORA-2015-9161, FreeBSD-EN-15:08.sendmail, FreeBSD-SA-15:10.openssl, HPSBGN03399, HPSBGN03407, HPSBGN03411, HPSBGN03417, HPSBHF03433, HPSBMU03345, HPSBMU03401, HPSBUX03363, HPSBUX03388, HPSBUX03435, HPSBUX03512, JSA10681, Logjam, NetBSD-SA2015-008, NTAP-20150616-0001, NTAP-20150715-0001, NTAP-20151028-0001, openSUSE-SU-2015:1139-1, openSUSE-SU-2015:1209-1, openSUSE-SU-2015:1216-1, openSUSE-SU-2015:1277-1, openSUSE-SU-2016:0226-1, openSUSE-SU-2016:0255-1, openSUSE-SU-2016:0261-1, openSUSE-SU-2016:2267-1, PAN-SA-2016-0020, PAN-SA-2016-0028, RHSA-2015:1072-01, RHSA-2015:1185-01, RHSA-2015:1197-01, RHSA-2016:2054-01, RHSA-2016:2055-01, RHSA-2016:2056-01, SA111, SA40002, SA98, SB10122, SSA:2015-219-02, SSRT102180, SSRT102254, SSRT102964, SSRT102977, SUSE-SU-2015:1143-1, SUSE-SU-2015:1150-1, SUSE-SU-2015:1177-1, SUSE-SU-2015:1177-2, SUSE-SU-2015:1181-1, SUSE-SU-2015:1181-2, SUSE-SU-2015:1182-2, SUSE-SU-2015:1183-1, SUSE-SU-2015:1183-2, SUSE-SU-2015:1184-1, SUSE-SU-2015:1184-2, SUSE-SU-2015:1185-1, SUSE-SU-2015:1268-1, SUSE-SU-2015:1268-2, SUSE-SU-2015:1269-1, SUSE-SU-2015:1581-1, SUSE-SU-2016:0224-1, SUSE-SU-2018:1768-1, TSB16728, USN-2624-1, USN-2625-1, USN-2656-1, USN-2656-2, VIGILANCE-VUL-16950, VN-2015-007.

Description of the vulnerability

The Diffie-Hellman algorithm is used to exchange cryptographic keys. The DHE_EXPORT suite uses prime numbers smaller than 512 bits.

The Diffie-Hellman algorithm is used by TLS. However, during the negotiation, an attacker, located as a Man-in-the-Middle, can force TLS to use DHE_EXPORT (event if stronger suites are available).

This vulnerability can then be combined with VIGILANCE-VUL-16951.

An attacker, located as a Man-in-the-Middle, can therefore force the TLS client/server to accept a weak export algorithm, in order to more easily capture or alter exchanged data.
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vulnerability alert 16951

TLS, SSH, VPN: weakening Diffie-Hellman via common primes

Synthesis of the vulnerability

An attacker, located as a Man-in-the-Middle, can obtain the DH keys used by the TLS/SSH/VPN client/server, in order to more easily capture or alter exchanged data.
Impacted products: Apache httpd, AnyConnect VPN Client, IVE OS, Juniper SA, lighttpd, nginx, OpenSSH, OpenSSL, Openswan, Postfix, SSL protocol, Sendmail.
Severity: 2/4.
Consequences: data reading, data creation/edition.
Provenance: internet server.
Creation date: 20/05/2015.
Identifiers: VIGILANCE-VUL-16951.

Description of the vulnerability

The Diffie-Hellman algorithm is used to exchange cryptographic keys. It is used by TLS, SSH and VPNs (IPsec).

Most servers use the same prime numbers (standardized in RFC 3526). An attacker can thus pre-compute values (100000 core CPU hours, so during a week for 512 bits with 100 computers approximately) and use the "number field sieve discrete log algorithm" attack to quickly obtain the used DH keys, and decrypt a session.

The 512 bits sets are considered as broken, and the 1024 bits sets are considered as breakable by a state.

For TLS, this vulnerability can be exploited after Logjam (VIGILANCE-VUL-16950).

An attacker, located as a Man-in-the-Middle, can therefore obtain the DH keys used by the TLS/SSH/VPN client/server, in order to more easily capture or alter exchanged data.
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computer vulnerability alert CVE-2015-2808

TLS: RC4 decryption via Bar Mitzvah

Synthesis of the vulnerability

An attacker can use the Bar Mitzvah Attack on TLS, in order to obtain sensitive information encrypted by RC4.
Impacted products: DCFM Enterprise, Brocade Network Advisor, Brocade vTM, Avamar, Black Diamond, ExtremeXOS, Summit, BIG-IP Hardware, TMOS, HPE BSM, HP Data Protector, HPE NNMi, HP Operations, SiteScope, HP Switch, HP-UX, AIX, DB2 UDB, Domino, Notes, IRAD, Security Directory Server, Tivoli Storage Manager, Tivoli Workload Scheduler, WebSphere AS Traditional, WebSphere MQ, SnapManager, Oracle Communications, Oracle Directory Server, Oracle Directory Services Plus, Oracle Fusion Middleware, Oracle GlassFish Server, Oracle Identity Management, Oracle iPlanet Web Server, Oracle OIT, Oracle Virtual Directory, WebLogic, Oracle Web Tier, SSL protocol, RHEL, SUSE Linux Enterprise Desktop, SLES.
Severity: 2/4.
Consequences: data reading.
Provenance: internet client.
Creation date: 27/03/2015.
Identifiers: 1450666, 1610582, 1647054, 1882708, 1883551, 1883553, 1902260, 1903541, 1960659, 1963275, 1967498, 523628, 7014463, 7022958, 7045736, 9010041, 9010044, Bar Mitzvah, BSA-2015-007, c04708650, c04767175, c04770140, c04772305, c04773119, c04773241, c04777195, c04777255, c04832246, c04926789, c05085988, c05336888, cpujan2018, cpuoct2017, CVE-2015-2808, DSA-2018-124, HPSBGN03350, HPSBGN03393, HPSBGN03399, HPSBGN03407, HPSBGN03414, HPSBGN03415, HPSBGN03580, HPSBHF03673, HPSBMU03345, HPSBMU03401, HPSBUX03435, HPSBUX03512, NTAP-20150715-0001, NTAP-20151028-0001, RHSA-2015:1020-01, RHSA-2015:1021-01, RHSA-2015:1091-01, SOL16864, SSRT102254, SSRT102977, SUSE-SU-2015:1073-1, SUSE-SU-2015:1085-1, SUSE-SU-2015:1086-1, SUSE-SU-2015:1086-2, SUSE-SU-2015:1086-3, SUSE-SU-2015:1086-4, SUSE-SU-2015:1138-1, SUSE-SU-2015:1161-1, VIGILANCE-VUL-16486, VN-2015-004.

Description of the vulnerability

During the initialization of a TLS session, the client and the server negotiate cryptographic algorithms. The RC4 algorithm can be chosen to encrypt data.

For some weak keys (one over 2^24), the Invariance Weakness can be used to predict the two LSB (Least Significant Bit) of the 100 first bytes encrypted with RC4. The first TLS message is "Finished" (36 bytes), thus an attacker can predict LSBs of 64 bytes.

An attacker can therefore use the Bar Mitzvah Attack on TLS, in order to obtain sensitive information encrypted by RC4.
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computer vulnerability CVE-2014-3566

SSL 3.0: decrypting session, POODLE

Synthesis of the vulnerability

An attacker, located as a Man-in-the-Middle, can decrypt a SSL 3.0 session, in order to obtain sensitive information.
Impacted products: SES, SNS, Apache httpd, Arkoon FAST360, ArubaOS, Asterisk Open Source, BES, ProxyAV, ProxySG par Blue Coat, SGOS by Blue Coat, GAiA, CheckPoint IP Appliance, IPSO, SecurePlatform, CheckPoint Security Appliance, CheckPoint Security Gateway, Cisco ASR, Cisco ACE, ASA, AsyncOS, Cisco CSS, Cisco ESA, IOS by Cisco, IOS XE Cisco, IOS XR Cisco, IronPort Email, Nexus by Cisco, NX-OS, Prime Infrastructure, Cisco PRSM, Cisco Router, WebNS, Clearswift Email Gateway, Clearswift Web Gateway, CUPS, Debian, Black Diamond, ExtremeXOS, Summit, BIG-IP Hardware, TMOS, Fedora, FortiGate, FortiGate Virtual Appliance, FortiManager, FortiManager Virtual Appliance, FortiOS, FreeBSD, F-Secure AV, hMailServer, HPE BSM, HP Data Protector, HPE NNMi, HP Operations, ProCurve Switch, SiteScope, HP Switch, TippingPoint IPS, HP-UX, AIX, Domino, Notes, Security Directory Server, SPSS Data Collection, Tivoli System Automation, Tivoli Workload Scheduler, WebSphere AS Traditional, WebSphere MQ, IVE OS, Juniper J-Series, Junos OS, Junos Space, Junos Space Network Management Platform, MAG Series by Juniper, NSM Central Manager, NSMXpress, Juniper SA, McAfee Email and Web Security, McAfee Email Gateway, ePO, VirusScan, McAfee Web Gateway, IE, Windows 2003, Windows 2008 R0, Windows 2008 R2, Windows 2012, Windows 7, Windows 8, Windows (platform) ~ not comprehensive, Windows RT, Windows Vista, NETASQ, NetBSD, NetScreen Firewall, ScreenOS, nginx, Nodejs Core, OpenSSL, openSUSE, openSUSE Leap, Oracle DB, Oracle Fusion Middleware, Oracle Identity Management, Oracle OIT, Solaris, Tuxedo, WebLogic, Palo Alto Firewall PA***, PAN-OS, Polycom CMA, HDX, RealPresence Collaboration Server, RealPresence Distributed Media Application, Polycom VBP, Postfix, SSL protocol, Puppet, RHEL, JBoss EAP by Red Hat, RSA Authentication Manager, ROS, ROX, RuggedSwitch, Slackware, Splunk Enterprise, stunnel, SUSE Linux Enterprise Desktop, SLES, Synology DSM, Ubuntu, Unix (platform) ~ not comprehensive, ESXi, vCenter Server, VMware vSphere, VMware vSphere Hypervisor, WinSCP.
Severity: 3/4.
Consequences: data reading, data creation/edition.
Provenance: internet client.
Creation date: 15/10/2014.
Identifiers: 10923, 1589583, 1595265, 1653364, 1657963, 1663874, 1687167, 1687173, 1687433, 1687604, 1687611, 1690160, 1690185, 1690342, 1691140, 1692551, 1695392, 1696383, 1699051, 1700706, 2977292, 3009008, 7036319, aid-10142014, AST-2014-011, bulletinapr2015, bulletinjan2015, bulletinjan2016, bulletinjul2015, bulletinjul2016, bulletinoct2015, c04486577, c04487990, c04492722, c04497114, c04506802, c04510230, c04567918, c04616259, c04626982, c04676133, c04776510, CERTFR-2014-ALE-007, CERTFR-2014-AVI-454, CERTFR-2014-AVI-509, CERTFR-2015-AVI-169, CERTFR-2016-AVI-303, cisco-sa-20141015-poodle, cpujul2017, CTX216642, CVE-2014-3566, DSA-3053-1, DSA-3253-1, DSA-3489-1, ESA-2014-178, ESA-2015-098, ESXi500-201502001, ESXi500-201502101-SG, ESXi510-201503001, ESXi510-201503001-SG, ESXi510-201503101-SG, ESXi550-201501001, ESXi550-201501101-SG, FEDORA-2014-12989, FEDORA-2014-12991, FEDORA-2014-13012, FEDORA-2014-13017, FEDORA-2014-13040, FEDORA-2014-13069, FEDORA-2014-13070, FEDORA-2014-13444, FEDORA-2014-13451, FEDORA-2014-13764, FEDORA-2014-13777, FEDORA-2014-13781, FEDORA-2014-13794, FEDORA-2014-14234, FEDORA-2014-14237, FEDORA-2014-15379, FEDORA-2014-15390, FEDORA-2014-15411, FEDORA-2014-17576, FEDORA-2014-17587, FEDORA-2015-9090, FEDORA-2015-9110, FreeBSD-SA-14:23.openssl, FSC-2014-8, HPSBGN03256, HPSBGN03305, HPSBGN03332, HPSBHF03156, HPSBHF03300, HPSBMU03152, HPSBMU03184, HPSBMU03213, HPSBMU03416, HPSBUX03162, HPSBUX03194, JSA10656, MDVSA-2014:203, MDVSA-2014:218, MDVSA-2015:062, NetBSD-SA2014-015, nettcp_advisory, openSUSE-SU-2014:1331-1, openSUSE-SU-2014:1384-1, openSUSE-SU-2014:1395-1, openSUSE-SU-2014:1426-1, openSUSE-SU-2016:0640-1, openSUSE-SU-2016:1586-1, openSUSE-SU-2017:0980-1, PAN-SA-2014-0005, POODLE, RHSA-2014:1652-01, RHSA-2014:1653-01, RHSA-2014:1692-01, RHSA-2014:1920-01, RHSA-2014:1948-01, RHSA-2015:0010-01, RHSA-2015:0011-01, RHSA-2015:0012-01, RHSA-2015:1545-01, RHSA-2015:1546-01, SA83, SB10090, SB10104, sk102989, SOL15702, SP-CAAANKE, SP-CAAANST, SPL-91947, SPL-91948, SSA:2014-288-01, SSA-396873, SSA-472334, SSRT101767, STORM-2014-02-FR, SUSE-SU-2014:1357-1, SUSE-SU-2014:1361-1, SUSE-SU-2014:1386-1, SUSE-SU-2014:1387-1, SUSE-SU-2014:1387-2, SUSE-SU-2014:1409-1, SUSE-SU-2015:0010-1, SUSE-SU-2016:1457-1, SUSE-SU-2016:1459-1, T1021439, TSB16540, USN-2839-1, VIGILANCE-VUL-15485, VMSA-2015-0001, VMSA-2015-0001.1, VMSA-2015-0001.2, VN-2014-003, VU#577193.

Description of the vulnerability

An SSL/TLS session can be established using several protocols:
 - SSL 2.0 (obsolete)
 - SSL 3.0
 - TLS 1.0
 - TLS 1.1
 - TLS 1.2

An attacker can downgrade the version to SSLv3. However, with SSL 3.0, an attacker can change the padding position with a CBC encryption, in order to progressively guess clear text fragments.

This vulnerability is named POODLE (Padding Oracle On Downgraded Legacy Encryption).

An attacker, located as a Man-in-the-Middle, can therefore decrypt a SSL 3.0 session, in order to obtain sensitive information.
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computer vulnerability announce 15037

SSL: revocation of CCA

Synthesis of the vulnerability

The Government of India Controller of Certifying Authorities certification authority emitted certificates to spoof several Google domains.
Impacted products: Windows 2003, Windows 2008 R0, Windows 2008 R2, Windows 2012, Windows 7, Windows 8, Windows RT, Windows Vista, SSL protocol.
Severity: 2/4.
Consequences: data reading, data creation/edition.
Provenance: internet server.
Creation date: 11/07/2014.
Identifiers: 2982792, VIGILANCE-VUL-15037.

Description of the vulnerability

The Government of India Controller of Certifying Authorities certification authority emitted certificates to spoof several Google domains (VIGILANCE-ACTU-4436).

It is thus recommended to delete this certification authority or to update the Certificate Trust List.
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computer vulnerability bulletin CVE-2013-3587

SSL, TLS: information disclosure via compression, BREACH

Synthesis of the vulnerability

An attacker can use several SSL/TLS compressed sessions, in order to obtain sensitive information from the server.
Impacted products: GAiA, CheckPoint IP Appliance, SecurePlatform, CheckPoint Security Appliance, CheckPoint Security Gateway, BIG-IP Hardware, TMOS, Fedora, SSL protocol.
Severity: 1/4.
Consequences: data reading.
Provenance: internet client.
Creation date: 05/08/2013.
Identifiers: CVE-2013-3587, FEDORA-2015-8606, FEDORA-2015-9143, sk93971, SOL14634, VIGILANCE-VUL-13198, VU#987798.

Description of the vulnerability

The bulletin VIGILANCE-VUL-11952 describes a vulnerability of SSL/TLS which uses the SSL/TLS compression. To protect against this vulnerability, SSL/TLS compression was disabled in most web browsers.

However, TLS/SSL servers can also transport data which uses another compression. For example, a web server can compress data it sends to its clients. A variant of the previous attack can thus still be exploited.

An attacker can therefore use several SSL/TLS compressed sessions, in order to obtain sensitive information from the server.
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