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Computer vulnerabilities of Broadcom BNA

vulnerability bulletin CVE-2015-6563 CVE-2015-6564 CVE-2015-6565

OpenSSH: three vulnerabilities

Synthesis of the vulnerability

An authenticated attacker can use several vulnerabilities of OpenSSH.
Impacted products: Blue Coat CAS, DCFM Enterprise, FabricOS, Brocade Network Advisor, Brocade vTM, Debian, BIG-IP Hardware, TMOS, Fedora, FreeBSD, AIX, Juniper EX-Series, Juniper J-Series, Junos OS, Junos Space, NSM Central Manager, NSMXpress, SRX-Series, McAfee Email Gateway, OpenBSD, OpenSSH, pfSense, RHEL, SUSE Linux Enterprise Desktop, SLES.
Severity: 2/4.
Consequences: administrator access/rights, privileged access/rights, user access/rights, data creation/edition.
Provenance: user account.
Number of vulnerabilities in this bulletin: 3.
Creation date: 12/08/2015.
Revisions dates: 03/09/2015, 27/01/2017.
Identifiers: BFS-SA-2015-002, BSA-2015-009, BSA-2019-764, BSA-2019-766, CERTFR-2017-AVI-012, CERTFR-2017-AVI-022, CERTFR-2019-AVI-325, CVE-2015-6563, CVE-2015-6564, CVE-2015-6565, DLA-1500-1, DLA-1500-2, FEDORA-2015-13520, FreeBSD-SA-15:22.openssh, JSA10774, JSA10840, JSA10940, K17263, RHSA-2015:2088-06, RHSA-2016:0741-01, SA104, SB10177, SB10178, SOL17263, SUSE-SU-2015:1581-1, SYMSA1337, VIGILANCE-VUL-17643.

Description of the vulnerability

Several vulnerabilities were announced in OpenSSH.

A local attacker can write a message (or ANSI sequences) on the tty of other users, because the tty is world-writable. It is also possible to use the TIOCSTI ioctl, in order to inject shell commands. [severity:2/4; CVE-2015-6565]

On OpenSSH Portable, a local attacker can use PAM and compromise the pre-authentication process, in order to impersonate other users. [severity:2/4; BFS-SA-2015-002, CVE-2015-6563]

On OpenSSH Portable, an attacker can compromise the pre-authentication process and force the usage of a freed memory area in PAM support, in order to trigger a denial of service, and possibly to run code. [severity:2/4; BFS-SA-2015-002, CVE-2015-6564]
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computer vulnerability announce CVE-2016-8204 CVE-2016-8205 CVE-2016-8206

Brocade Network Advisor: multiple directory traversal

Synthesis of the vulnerability

An authenticated attacker can traverse directories via 4 servlets of Brocade Network Advisor, in order to read, overwrite or remove any file outside the service root path, including program files.
Impacted products: Brocade Network Advisor.
Severity: 4/4.
Consequences: privileged access/rights, data reading, data creation/edition, data deletion.
Provenance: intranet client.
Number of vulnerabilities in this bulletin: 4.
Creation date: 10/01/2017.
Identifiers: BSA-2016-177, BSA-2016-178, BSA-2016-179, BSA-2016-180, CVE-2016-8204, CVE-2016-8205, CVE-2016-8206, CVE-2016-8207, VIGILANCE-VUL-21537, ZDI-17-049, ZDI-17-050, ZDI-17-051, ZDI-17-052.

Description of the vulnerability

The Brocade Network Advisor product offers a web service based on J2EE.

However, user's data are directly inserted in an access path. Sequences such as "/.." can thus be used to go in the upper directory.

An authenticated attacker can therefore traverse directories via 4 servlets of Brocade Network Advisor, in order to read, overwrite or remove any file outside the service root path, including program files.
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computer vulnerability CVE-2016-0793

WildFly: file reading WEB-INF/META-INF

Synthesis of the vulnerability

An attacker can read a WEB-INF/META-INF file of WildFly, in order to obtain sensitive information.
Impacted products: Brocade Network Advisor, Unisphere EMC, JBoss AS OpenSource, WildFly.
Severity: 2/4.
Consequences: data reading.
Provenance: document.
Creation date: 04/04/2016.
Identifiers: 1305937, 499009, BSA-2017-314, CVE-2016-0793, ESA-2017-056, VIGILANCE-VUL-19295.

Description of the vulnerability

The WildFly product uses a filter to forbid the WEB-INF/META-INF files to be read.

However, on Windows, an attacker can use lowercase characters, to bypass file access restrictions of WEB-INF/META-INF.

An attacker can therefore read a WEB-INF/META-INF file of WildFly, in order to obtain sensitive information.
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vulnerability announce CVE-2016-0636

Oracle Java: code execution via Hotspot

Synthesis of the vulnerability

An attacker can use a vulnerability in Hotspot of Oracle Java, in order to run code in the web browser of the victim who loads a malicious Java applet.
Impacted products: FabricOS, Brocade Network Advisor, Brocade vTM, Debian, Fedora, Domino, Notes, QRadar SIEM, Java OpenJDK, openSUSE, openSUSE Leap, Java Oracle, RHEL, SUSE Linux Enterprise Desktop, SLES, Ubuntu.
Severity: 3/4.
Consequences: user access/rights.
Provenance: document.
Creation date: 24/03/2016.
Identifiers: 1984678, 1985875, 1987778, BSA-2016-006, CERTFR-2016-AVI-108, CVE-2016-0636, DLA-451-1, DSA-3558-1, FEDORA-2016-90ee071b21, FEDORA-2016-d5dd39a1d5, openSUSE-SU-2016:0971-1, openSUSE-SU-2016:0983-1, openSUSE-SU-2016:1004-1, openSUSE-SU-2016:1005-1, openSUSE-SU-2016:1042-1, RHSA-2016:0511-01, RHSA-2016:0512-01, RHSA-2016:0513-01, RHSA-2016:0514-01, RHSA-2016:0515-01, RHSA-2016:0516-01, SE-2012-01, SUSE-SU-2016:0956-1, SUSE-SU-2016:0957-1, SUSE-SU-2016:0959-1, USN-2942-1, VIGILANCE-VUL-19232.

Description of the vulnerability

The Oracle Java product uses the Hotspot compiler.

However, a vulnerability in Hotspot leads to code execution. Technical details are unknown, but it may be related to an incomplete fix for CVE-2013-5838.

An attacker can therefore use a vulnerability in Hotspot of Oracle Java, in order to run code in the web browser of the victim who loads a malicious Java applet.
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vulnerability CVE-2016-0702 CVE-2016-0705 CVE-2016-0797

OpenSSL: seven vulnerabilities

Synthesis of the vulnerability

An attacker can use several vulnerabilities of OpenSSL.
Impacted products: Blue Coat CAS, ProxyAV, ProxySG par Blue Coat, Brocade Network Advisor, Brocade vTM, Cisco ASR, Cisco ATA, Cisco AnyConnect Secure Mobility Client, Cisco ACE, ASA, IOS by Cisco, IOS XE Cisco, Nexus by Cisco, NX-OS, Cisco Prime Access Registrar, Prime Collaboration Assurance, Prime Collaboration Manager, Prime Infrastructure, Cisco Prime LMS, Cisco PRSM, Cisco CUCM, Cisco Unified CCX, Cisco IP Phone, Cisco MeetingPlace, Cisco Wireless IP Phone, Cisco WSA, Cisco Wireless Controller, XenServer, Debian, PowerPath, ExtremeXOS, BIG-IP Hardware, TMOS, Fedora, FileZilla Server, FreeBSD, HP Switch, AIX, Domino, Notes, IRAD, Rational ClearCase, QRadar SIEM, Tivoli Storage Manager, Tivoli Workload Scheduler, WebSphere AS Traditional, WebSphere MQ, Juniper J-Series, Junos OS, Junos Space, Juniper Network Connect, NSM Central Manager, NSMXpress, McAfee Web Gateway, Meinberg NTP Server, Data ONTAP 7-Mode, Snap Creator Framework, NetScreen Firewall, ScreenOS, Nodejs Core, OpenSSL, openSUSE, openSUSE Leap, Solaris, Palo Alto Firewall PA***, PAN-OS, Pulse Connect Secure, Pulse Secure Client, Pulse Secure SBR, Puppet, RHEL, JBoss EAP by Red Hat, ROX, 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, Nessus, Ubuntu, VxWorks, WinSCP, X2GoClient.
Severity: 2/4.
Consequences: data reading, data creation/edition.
Provenance: internet client.
Number of vulnerabilities in this bulletin: 7.
Creation date: 01/03/2016.
Revision date: 07/03/2016.
Identifiers: 000008897, 046178, 046208, 1979498, 1979602, 1987779, 1993210, 2003480, 2003620, 2003673, 2012827, 2013020, 2014202, 2014651, 2014669, 2015080, 2016039, 7043086, 9010066, 9010067, 9010072, BSA-2016-004, bulletinapr2016, bulletinjan2016, CERTFR-2016-AVI-076, CERTFR-2016-AVI-080, cisco-sa-20160302-openssl, CTX208403, CVE-2016-0702, CVE-2016-0705, CVE-2016-0797, CVE-2016-0798, CVE-2016-0799, CVE-2016-0800, CVE-2016-2842, DSA-3500-1, ESA-2016-080, FEDORA-2016-2802690366, FEDORA-2016-e1234b65a2, FEDORA-2016-e6807b3394, FreeBSD-SA-16:12.openssl, HPESBHF03741, ibm10732391, ibm10733905, ibm10738249, ibm10738401, JSA10722, JSA10759, K22334603, K52349521, K93122894, MBGSA-1602, NTAP-20160301-0001, NTAP-20160303-0001, NTAP-20160321-0001, openSUSE-SU-2016:0627-1, openSUSE-SU-2016:0628-1, openSUSE-SU-2016:0637-1, openSUSE-SU-2016:0638-1, openSUSE-SU-2016:0640-1, openSUSE-SU-2016:0720-1, openSUSE-SU-2016:1566-1, openSUSE-SU-2017:1211-1, openSUSE-SU-2017:1212-1, PAN-SA-2016-0020, PAN-SA-2016-0028, PAN-SA-2016-0030, RHSA-2016:0301-01, RHSA-2016:0302-01, RHSA-2016:0303-01, RHSA-2016:0304-01, RHSA-2016:0305-01, RHSA-2016:0306-01, RHSA-2016:0372-01, RHSA-2016:0445-01, RHSA-2016:0446-01, RHSA-2016:0490-01, RHSA-2016:1519-01, RHSA-2016:2073-01, RHSA-2018:2568-01, RHSA-2018:2575-01, SA117, SA40168, SB10156, SOL22334603, SOL40524634, SOL52349521, SOL79215841, SOL93122894, SSA:2016-062-02, SSA-623229, SUSE-SU-2016:0617-1, SUSE-SU-2016:0620-1, SUSE-SU-2016:0621-1, SUSE-SU-2016:0624-1, SUSE-SU-2016:0631-1, SUSE-SU-2016:0641-1, SUSE-SU-2016:0678-1, SUSE-SU-2018:2839-1, SUSE-SU-2018:3082-1, TNS-2016-03, USN-2914-1, VIGILANCE-VUL-19060, VN-2016-004, VU#583776.

Description of the vulnerability

Several vulnerabilities were announced in OpenSSL.

An attacker can act as a Man-in-the-Middle on a server supporting SSLv2 and EXPORT ciphers (this configuration is considered as weak since several years), in order to read or write data in the session. [severity:2/4; CVE-2016-0800, VU#583776]

An attacker can force the usage of a freed memory area when OpenSSL processes a DSA private key (this scenario is rare), in order to trigger a denial of service, and possibly to run code. [severity:2/4; CVE-2016-0705]

An attacker can read a memory fragment via SRP_VBASE_get_by_user, in order to obtain sensitive information. [severity:1/4; CVE-2016-0798]

An attacker can force a NULL pointer to be dereferenced in BN_hex2bn(), in order to trigger a denial of service. [severity:1/4; CVE-2016-0797]

An attacker can use a very large string (size INT_MAX), to generate a memory corruption in the BIO_*printf() functions, in order to trigger a denial of service, and possibly to run code. [severity:2/4; CVE-2016-0799]

An attacker can use cache conflicts on Intel Sandy-Bridge, in order to obtain RSA keys. [severity:1/4; CVE-2016-0702]

An attacker can use a very large string (size INT_MAX), to generate a memory corruption in the internal doapr_outch() function, in order to trigger a denial of service, and possibly to run code. [severity:2/4; CVE-2016-2842]
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vulnerability alert CVE-2016-0703 CVE-2016-0704

OpenSSL: two vulnerabilities

Synthesis of the vulnerability

An attacker can use several vulnerabilities of OpenSSL.
Impacted products: Blue Coat CAS, ProxyAV, ProxySG par Blue Coat, Brocade Network Advisor, Brocade vTM, Cisco ASR, Cisco ATA, Cisco AnyConnect Secure Mobility Client, Cisco ACE, ASA, IOS by Cisco, IOS XE Cisco, Nexus by Cisco, NX-OS, Cisco Prime Access Registrar, Prime Collaboration Assurance, Prime Collaboration Manager, Prime Infrastructure, Cisco Prime LMS, Cisco PRSM, Cisco CUCM, Cisco Unified CCX, Cisco IP Phone, Cisco MeetingPlace, Cisco Wireless IP Phone, Cisco WSA, Cisco Wireless Controller, BIG-IP Hardware, TMOS, FreeBSD, HP Switch, IRAD, Juniper J-Series, Junos OS, Junos Space, Juniper Network Connect, NSM Central Manager, NSMXpress, Data ONTAP 7-Mode, NetScreen Firewall, ScreenOS, OpenSSL, openSUSE, openSUSE Leap, Solaris, Palo Alto Firewall PA***, PAN-OS, Pulse Connect Secure, Pulse Secure Client, Pulse Secure SBR, RHEL, SUSE Linux Enterprise Desktop, SLES, Nessus, VxWorks.
Severity: 2/4.
Consequences: data reading, data creation/edition.
Provenance: internet client.
Number of vulnerabilities in this bulletin: 2.
Creation date: 01/03/2016.
Identifiers: 046178, 046208, 1979498, 9010067, BSA-2016-004, bulletinapr2016, bulletinjan2016, CERTFR-2016-AVI-076, CERTFR-2016-AVI-080, cisco-sa-20160302-openssl, CVE-2016-0703, CVE-2016-0704, FreeBSD-SA-16:12.openssl, HPESBHF03741, JSA10759, NTAP-20160303-0001, openSUSE-SU-2016:0627-1, openSUSE-SU-2016:0628-1, openSUSE-SU-2016:0638-1, openSUSE-SU-2016:0720-1, PAN-SA-2016-0030, RHSA-2016:0372-01, SA117, SA40168, SOL95463126, SUSE-SU-2016:0617-1, SUSE-SU-2016:0620-1, SUSE-SU-2016:0621-1, SUSE-SU-2016:0624-1, SUSE-SU-2016:0631-1, SUSE-SU-2016:0641-1, SUSE-SU-2016:0678-1, TNS-2016-03, VIGILANCE-VUL-19061.

Description of the vulnerability

Several vulnerabilities were announced in OpenSSL.

The 2_srvr.c file did not enforce that clear-key-length is zero for non-export ciphers, so an attacker can act as a Man-in-the-Middle on SSLv2, in order to read or write data in the session. [severity:2/4; CVE-2016-0703]

The 2_srvr.c file overwrite some byte dur the Bleichenbacher protection, so an attacker can act as a Man-in-the-Middle on SSLv2, in order to read or write data in the session. [severity:2/4; CVE-2016-0704]
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computer vulnerability alert CVE-2015-7547

glibc: buffer overflow of getaddrinfo

Synthesis of the vulnerability

An attacker, who owns a malicious DNS server, can reply with long data to a client application using the getaddrinfo() function of the glibc, in order to trigger a denial of service, and possibly to run code in the client application.
Impacted products: ArubaOS, Blue Coat CAS, Brocade Network Advisor, Brocade vTM, Cisco ASR, Cisco Catalyst, IOS XE Cisco, Nexus by Cisco, NX-OS, Cisco Prime Access Registrar, Cisco Prime DCNM, Secure ACS, Cisco CUCM, Cisco IP Phone, Cisco Wireless IP Phone, Cisco Wireless Controller, XenDesktop, PowerPath, Unisphere EMC, VNX Operating Environment, VNX Series, ExtremeXOS, BIG-IP Hardware, TMOS, Fedora, QRadar SIEM, Trinzic, NSM Central Manager, NSMXpress, McAfee Email Gateway, McAfee MOVE AntiVirus, VirusScan, McAfee Web Gateway, openSUSE, openSUSE Leap, Palo Alto Firewall PA***, PAN-OS, RealPresence Distributed Media Application, Polycom VBP, RHEL, ROX, RuggedSwitch, Slackware, SUSE Linux Enterprise Desktop, SLES, Synology DS***, Synology RS***, Ubuntu, Unix (platform) ~ not comprehensive, ESXi, VMware vSphere, VMware vSphere Hypervisor.
Severity: 4/4.
Consequences: user access/rights, denial of service on service, denial of service on client.
Provenance: internet client.
Creation date: 16/02/2016.
Revision date: 17/02/2016.
Identifiers: 046146, 046151, 046153, 046155, 046158, 1977665, 478832, 479427, 479906, 480572, 480707, 480708, ARUBA-PSA-2016-001, BSA-2016-003, BSA-2016-004, CERTFR-2016-AVI-066, CERTFR-2016-AVI-071, CERTFR-2017-AVI-012, CERTFR-2017-AVI-022, cisco-sa-20160218-glibc, CTX206991, CVE-2015-7547, ESA-2016-020, ESA-2016-027, ESA-2016-028, ESA-2016-029, ESA-2016-030, FEDORA-2016-0480defc94, FEDORA-2016-0f9e9a34ce, JSA10774, KB #4858, openSUSE-SU-2016:0490-1, openSUSE-SU-2016:0510-1, openSUSE-SU-2016:0511-1, openSUSE-SU-2016:0512-1, PAN-SA-2016-0021, RHSA-2016:0175-01, RHSA-2016:0176-01, RHSA-2016:0225-01, SA114, SB10150, SOL47098834, SSA:2016-054-02, SSA-301706, SUSE-SU-2016:0470-1, SUSE-SU-2016:0471-1, SUSE-SU-2016:0472-1, SUSE-SU-2016:0473-1, USN-2900-1, VIGILANCE-VUL-18956, VMSA-2016-0002, VMSA-2016-0002.1, VN-2016-003.

Description of the vulnerability

The glibc library implements a DNS resolver (libresolv).

An application can thus call the getaddrinfo() function, which queries DNS servers. When the AF_UNSPEC type is used in the getaddrinfo() call, two DNS A and AAAA queries are sent simultaneously. However, this special case, and a case with AF_INET6 are not correctly managed, and lead to an overflow if the reply coming from the DNS server is larger than 2048 bytes.

An attacker, who owns a malicious DNS server, can therefore reply with large data to a client application using the getaddrinfo() function of the glibc, in order to trigger a denial of service, and possibly to run code in the client application.
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computer vulnerability announce CVE-2015-3197

OpenSSL: using disabled SSLv2 ciphers

Synthesis of the vulnerability

An attacker can connect to a SSLv2 server with disabled ciphers in OpenSSL, in order to create a TLS session which is not secure.
Impacted products: Blue Coat CAS, ProxyAV, ProxySG par Blue Coat, SGOS by Blue Coat, Brocade Network Advisor, Brocade vTM, ASA, AsyncOS, Cisco ESA, Cisco IPS, Nexus by Cisco, NX-OS, Cisco CUCM, Cisco Manager Attendant Console, Cisco IP Phone, Black Diamond, ExtremeXOS, Summit, BIG-IP Hardware, TMOS, Fedora, FreeBSD, HP Switch, AIX, Tivoli Storage Manager, Juniper J-Series, Junos OS, Junos Space, NSM Central Manager, NSMXpress, McAfee Email Gateway, Data ONTAP 7-Mode, NetScreen Firewall, ScreenOS, Nodejs Core, OpenSSL, openSUSE, openSUSE Leap, Oracle Communications, Solaris, Puppet, RHEL, JBoss EAP by Red Hat, Slackware, stunnel, SUSE Linux Enterprise Desktop, SLES, VxWorks, X2GoClient.
Severity: 1/4.
Consequences: data reading.
Provenance: internet client.
Creation date: 28/01/2016.
Identifiers: 2003480, 2003620, 2003673, 9010060, BSA-2016-004, bulletinjan2016, c05390893, CERTFR-2016-AVI-041, cisco-sa-20160129-openssl, cpuoct2016, cpuoct2017, CVE-2015-3197, FEDORA-2016-527018d2ff, FEDORA-2016-e1234b65a2, FreeBSD-SA-16:11.openssl, HPESBHF03703, JSA10759, NTAP-20160201-0001, openSUSE-SU-2016:0362-1, openSUSE-SU-2016:0442-1, openSUSE-SU-2016:0627-1, openSUSE-SU-2016:0628-1, openSUSE-SU-2016:0637-1, openSUSE-SU-2016:0638-1, openSUSE-SU-2016:0640-1, openSUSE-SU-2016:0720-1, RHSA-2016:0372-01, RHSA-2016:0445-01, RHSA-2016:0446-01, RHSA-2016:0490-01, SA111, SB10203, SOL33209124, SOL64009378, SSA:2016-034-03, SUSE-SU-2016:0617-1, SUSE-SU-2016:0620-1, SUSE-SU-2016:0621-1, SUSE-SU-2016:0624-1, SUSE-SU-2016:0631-1, SUSE-SU-2016:0641-1, SUSE-SU-2016:0678-1, VIGILANCE-VUL-18837, VN-2016-002.

Description of the vulnerability

The OpenSSL library disables by default SSLv2, excepted if the SSL_OP_NO_SSLv2 option is used.

SSLv2 cipher algorithms can be disabled on the server. However, a malicious client can still use these algorithms.

An attacker can therefore connect to a SSLv2 server with disabled ciphers in OpenSSL, in order to create a TLS session which is not secure.
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computer vulnerability alert CVE-2016-0701

OpenSSL: obtaining private exponent via DH Small Subgroups

Synthesis of the vulnerability

In some special configurations, an attacker can find the private DH exponent of the OpenSSL peer, in order to decrypt other sessions.
Impacted products: Blue Coat CAS, ProxyAV, ProxySG par Blue Coat, SGOS by Blue Coat, FabricOS, Brocade Network Advisor, Brocade vTM, ASA, AsyncOS, Cisco ESA, Cisco IPS, Nexus by Cisco, NX-OS, Cisco CUCM, Cisco Manager Attendant Console, Cisco IP Phone, Black Diamond, ExtremeXOS, Summit, BIG-IP Hardware, TMOS, Fedora, HP Switch, Tivoli Storage Manager, Tivoli Workload Scheduler, Juniper J-Series, Junos OS, Junos Space, NSM Central Manager, NSMXpress, Data ONTAP 7-Mode, NetScreen Firewall, ScreenOS, OpenSSL, openSUSE, Oracle Communications, Oracle DB, Oracle Fusion Middleware, Oracle Identity Management, Solaris, WebLogic, Puppet, stunnel, Ubuntu, VxWorks.
Severity: 2/4.
Consequences: data reading, data creation/edition.
Provenance: internet client.
Creation date: 28/01/2016.
Identifiers: 1979602, 2003480, 2003620, 2003673, 9010060, BSA-2016-005, bulletinjan2018, c05390893, CERTFR-2016-AVI-041, cisco-sa-20160129-openssl, cpujul2019, cpuoct2017, CVE-2016-0701, FEDORA-2016-527018d2ff, HPESBHF03703, JSA10759, NTAP-20160201-0001, openSUSE-SU-2016:0637-1, SA111, SOL33209124, SOL64009378, USN-2883-1, VIGILANCE-VUL-18836, VN-2016-002, VU#257823.

Description of the vulnerability

Since version 1.0.2, the OpenSSL library can generate DH unsafe parameters of style X9.42 (subgroup size "q"), to support the RFC 5114.

In this case, an attacker can find the private DH exponent of the peer, if the DH key is reused. The DH key is reused in the following cases:
 - SSL_CTX_set_tmp_dh() or SSL_set_tmp_dh() is used without the option SSL_OP_SINGLE_DH_USE set, which is rare.
 - SSL_CTX_set_tmp_dh_callback() or SSL_set_tmp_dh_callback() is used in an undocumented mode.
 - Static DH ciphersuites are used.

In some special configurations, an attacker can therefore find the private DH exponent of the OpenSSL peer, in order to decrypt other sessions.
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computer vulnerability alert CVE-2016-0755

cURL: privilege escalation via the use of proxy using NTLM authentication

Synthesis of the vulnerability

An attacker can use cURL with an HTTP proxy and NTLM authentication with the proxy account of another user, in order to escalate his privileges.
Impacted products: SDS, SES, SNS, OpenOffice, Mac OS X, Brocade Network Advisor, Brocade vTM, curl, Debian, Fedora, Juniper EX-Series, Junos OS, SRX-Series, openSUSE, openSUSE Leap, Solaris, Slackware, Ubuntu.
Severity: 1/4.
Consequences: administrator access/rights, privileged access/rights.
Provenance: user shell.
Creation date: 27/01/2016.
Identifiers: BSA-2016-004, cpuoct2018, CVE-2016-0755, DSA-3455-1, FEDORA-2016-3fa315a5dd, FEDORA-2016-55137a3adb, FEDORA-2016-57bebab3b6, FEDORA-2016-5a141de5d9, HT207170, JSA10874, openSUSE-SU-2016:0360-1, openSUSE-SU-2016:0373-1, openSUSE-SU-2016:0376-1, SSA:2016-039-01, STORM-2019-002, USN-2882-1, VIGILANCE-VUL-18826.

Description of the vulnerability

The cURL product includes an embedable HTTP client. It can use HTTP proxies.

When a proxy requires an NTLM authentication, this authentication is connection based (in contrast to HTTP based authentication which is request based). Typically, cURL reuses TCP connections to the proxy for several HTTP requests. However, cURL may do so even if different credentials for the proxy have been specified at request level.

An attacker can therefore use cURL with an HTTP proxy and NTLM authentication with the proxy account of another user, in order to escalate his privileges.
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