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 HP-UX

vulnerability announce CVE-2016-9131 CVE-2016-9147 CVE-2016-9444

ISC BIND: four vulnerabilities

Synthesis of the vulnerability

An attacker can use several vulnerabilities of ISC BIND.
Impacted products: Debian, BIG-IP Hardware, TMOS, Fedora, HP-UX, AIX, BIND, Juniper J-Series, Junos OS, SRX-Series, Data ONTAP 7-Mode, openSUSE, openSUSE Leap, Solaris, RHEL, Slackware, SUSE Linux Enterprise Desktop, SLES, Ubuntu.
Severity: 2/4.
Consequences: denial of service on service.
Provenance: intranet client.
Number of vulnerabilities in this bulletin: 4.
Creation date: 12/01/2017.
Identifiers: bulletinjan2017, c05381687, CERTFR-2017-AVI-013, CERTFR-2017-AVI-111, CVE-2016-9131, CVE-2016-9147, CVE-2016-9444, CVE-2016-9778, DLA-805-1, DSA-3758-1, FEDORA-2017-59ca54c94e, FEDORA-2017-87992a0557, FEDORA-2017-8f23f564ad, FEDORA-2017-f44f2f5a48, HPESBUX03699, JSA10785, K02138183, NTAP-20180926-0001, NTAP-20180926-0002, NTAP-20180926-0003, NTAP-20180926-0004, NTAP-20180926-0005, NTAP-20180927-0001, openSUSE-SU-2017:0182-1, openSUSE-SU-2017:0193-1, RHSA-2017:0062-01, RHSA-2017:0063-01, RHSA-2017:0064-01, RHSA-2017:1583-01, SSA:2017-011-01, SSRT110304, SUSE-SU-2017:0111-1, SUSE-SU-2017:0112-1, SUSE-SU-2017:0113-1, USN-3172-1, VIGILANCE-VUL-21552.

Description of the vulnerability

Several vulnerabilities were announced in ISC BIND.

An attacker can force an assertion error via ANY Response, in order to trigger a denial of service. [severity:2/4; CVE-2016-9131]

An attacker can force an assertion error via DNSSEC Information Response, in order to trigger a denial of service. [severity:2/4; CVE-2016-9147]

An attacker can force an assertion error via DS Record Response, in order to trigger a denial of service. [severity:2/4; CVE-2016-9444]

An attacker can force an assertion error via nxdomain-redirect, in order to trigger a denial of service. [severity:2/4; CVE-2016-9778]
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vulnerability note CVE-2016-0736 CVE-2016-2161 CVE-2016-8743

Apache httpd: three vulnerabilities

Synthesis of the vulnerability

An attacker can use several vulnerabilities of Apache httpd.
Impacted products: Apache httpd, Mac OS X, Debian, BIG-IP Hardware, TMOS, Fedora, HP-UX, Junos Space, openSUSE Leap, RHEL, Slackware, SUSE Linux Enterprise Desktop, SLES, TrendMicro ServerProtect, Ubuntu.
Severity: 3/4.
Consequences: data reading, data creation/edition, denial of service on service.
Provenance: internet client.
Number of vulnerabilities in this bulletin: 3.
Creation date: 21/12/2016.
Revision date: 22/12/2016.
Identifiers: 1117414, APPLE-SA-2017-09-25-1, CVE-2016-0736, CVE-2016-2161, CVE-2016-8743, DLA-841-1, DLA-841-2, DSA-3796-1, DSA-3796-2, FEDORA-2016-8d9b62c784, FEDORA-2016-d22f50d985, HPESBUX03725, HT207615, HT208144, HT208221, JSA10838, K00373024, openSUSE-SU-2017:0897-1, openSUSE-SU-2017:0903-1, openSUSE-SU-2018:2856-1, RHSA-2017:0906-01, RHSA-2017:1721-01, SSA:2016-358-01, SUSE-SU-2018:2554-1, SUSE-SU-2018:2815-1, USN-3279-1, USN-3373-1, VIGILANCE-VUL-21434.

Description of the vulnerability

Several vulnerabilities were announced in Apache httpd.

An attacker can tamper with encrypted session data, in order to get knowledge of the plain text value. [severity:1/4; CVE-2016-0736]

An attacker can trigger a fatal error in case of use of shared memory, in order to trigger a denial of service. [severity:2/4; CVE-2016-2161]

An attacker can make profit of syntax error recovery to tamper with HTTP responses headers and bodies. [severity:3/4; CVE-2016-8743]
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computer vulnerability note CVE-2016-10009 CVE-2016-10010 CVE-2016-10011

OpenSSH: five vulnerabilities

Synthesis of the vulnerability

An attacker can use several vulnerabilities of OpenSSH.
Impacted products: Mac OS X, Blue Coat CAS, Debian, VNX Operating Environment, VNX Series, BIG-IP Hardware, TMOS, Fedora, FreeBSD, HP-UX, AIX, Juniper EX-Series, Juniper J-Series, Junos OS, Junos Space, Junos Space Network Management Platform, SRX-Series, McAfee Email Gateway, Data ONTAP 7-Mode, OpenSSH, openSUSE Leap, Solaris, pfSense, RHEL, Slackware, SUSE Linux Enterprise Desktop, SLES, Ubuntu.
Severity: 2/4.
Consequences: administrator access/rights, privileged access/rights, user access/rights, data reading.
Provenance: intranet client.
Number of vulnerabilities in this bulletin: 5.
Creation date: 19/12/2016.
Identifiers: 1009, 1010, bulletinapr2017, CERTFR-2019-AVI-325, CVE-2016-10009, CVE-2016-10010, CVE-2016-10011, CVE-2016-10012, DLA-1500-1, DLA-1500-2, DSA-2019-131, FEDORA-2017-4767e2991d, FreeBSD-SA-17:01.openssh, HPESBUX03818, HT207615, JSA10880, JSA10940, K24324390, K31440025, K62201745, K64292204, NTAP-20171130-0002, openSUSE-SU-2017:0344-1, openSUSE-SU-2017:0674-1, pfSense-SA-17_03.webgui, RHSA-2017:2029-01, SA144, SSA-181018, SSA:2016-358-02, SUSE-SU-2018:2275-1, SUSE-SU-2018:2685-1, SUSE-SU-2018:3540-1, USN-3538-1, VIGILANCE-VUL-21419.

Description of the vulnerability

Several vulnerabilities were announced in OpenSSH.

An attacker can bypass security features via ssh-agent, in order to escalate his privileges. [severity:2/4; CVE-2016-10009]

An attacker can bypass security features via Unix Domain Sockets, in order to escalate his privileges. [severity:2/4; CVE-2016-10010]

An attacker can bypass security features via Privilege-separated Child realloc(), in order to obtain sensitive information. [severity:1/4; CVE-2016-10011]

An attacker can generate a buffer overflow via Pre-authentication Compression, in order to trigger a denial of service, and possibly to run code. [severity:2/4; CVE-2016-10012]

An attacker can bypass security features via AllowUser/DenyUsers Address Ranges, in order to escalate his privileges. [severity:2/4]
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vulnerability bulletin CVE-2016-8740

Apache httpd: denial of service via HTTP/2

Synthesis of the vulnerability

An attacker can generate an overload via the HTTP/2 experimental module of Apache httpd, in order to trigger a denial of service.
Impacted products: Apache httpd, Mac OS X, Fedora, HP-UX, openSUSE Leap, Slackware, TrendMicro ServerProtect.
Severity: 2/4.
Consequences: denial of service on server, denial of service on service.
Provenance: internet client.
Creation date: 05/12/2016.
Identifiers: 1117414, APPLE-SA-2017-09-25-1, CVE-2016-8740, FEDORA-2016-260d22944d, FEDORA-2016-b39fedec11, HPESBUX03725, HT207615, HT208144, HT208221, openSUSE-SU-2017:0297-1, SSA:2016-358-01, VIGILANCE-VUL-21263.

Description of the vulnerability

An attacker can generate an overload via the HTTP/2 experimental module of Apache httpd, in order to trigger a denial of service.
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vulnerability CVE-2016-7426 CVE-2016-7427 CVE-2016-7428

NTP.org: multiple vulnerabilities

Synthesis of the vulnerability

An attacker can use several vulnerabilities of NTP.org.
Impacted products: Blue Coat CAS, Cisco ASR, Cisco Catalyst, IOS by Cisco, IOS XE Cisco, IOS XR Cisco, Nexus by Cisco, NX-OS, Prime Collaboration Assurance, Cisco Prime DCNM, Prime Infrastructure, Cisco Prime LMS, Cisco Router, Secure ACS, Cisco CUCM, Cisco Unified CCX, Cisco MeetingPlace, Cisco Unity ~ precise, BIG-IP Hardware, TMOS, Fedora, FreeBSD, HP Switch, HP-UX, AIX, Security Directory Server, Juniper J-Series, Junos OS, Junos Space, Meinberg NTP Server, Data ONTAP 7-Mode, NTP.org, openSUSE Leap, Solaris, pfSense, RHEL, Slackware, Synology DSM, Synology DS***, Synology RS***, Ubuntu.
Severity: 2/4.
Consequences: data reading, denial of service on service, denial of service on client.
Provenance: internet client.
Number of vulnerabilities in this bulletin: 10.
Creation date: 21/11/2016.
Identifiers: 2009389, bulletinoct2016, CERTFR-2017-AVI-090, cisco-sa-20161123-ntpd, CVE-2016-7426, CVE-2016-7427, CVE-2016-7428, CVE-2016-7429, CVE-2016-7431, CVE-2016-7433, CVE-2016-7434, CVE-2016-9310, CVE-2016-9311, CVE-2016-9312, FEDORA-2016-7209ab4e02, FEDORA-2016-c198d15316, FEDORA-2016-e8a8561ee7, FreeBSD-SA-16:39.ntp, HPESBHF03883, HPESBUX03706, HPESBUX03885, JSA10776, JSA10796, K51444934, K55405388, K87922456, MBGSA-1605, NTAP-20170127-0001, NTAP-20170310-0002, NTAP-20180201-0001, openSUSE-SU-2016:3280-1, pfSense-SA-17_03.webgui, RHSA-2017:0252-01, SA139, SSA:2016-326-01, TALOS-2016-0130, TALOS-2016-0131, TALOS-2016-0203, TALOS-2016-0204, USN-3349-1, VIGILANCE-VUL-21170, VU#633847.

Description of the vulnerability

Several vulnerabilities were announced in NTP.org.

An attacker can force an assertion error, in order to trigger a denial of service. [severity:2/4; CVE-2016-9311, TALOS-2016-0204]

An attacker can bypass security features via Mode 6, in order to obtain sensitive information. [severity:2/4; CVE-2016-9310, TALOS-2016-0203]

An attacker can trigger a fatal error via Broadcast Mode Replay, in order to trigger a denial of service. [severity:2/4; CVE-2016-7427, TALOS-2016-0131]

An attacker can trigger a fatal error via Broadcast Mode Poll Interval, in order to trigger a denial of service. [severity:2/4; CVE-2016-7428, TALOS-2016-0130]

An attacker can send malicious UDP packets, in order to trigger a denial of service on Windows. [severity:2/4; CVE-2016-9312]

An unknown vulnerability was announced via Zero Origin Timestamp. [severity:2/4; CVE-2016-7431]

An attacker can force a NULL pointer to be dereferenced via _IO_str_init_static_internal(), in order to trigger a denial of service. [severity:2/4; CVE-2016-7434]

An unknown vulnerability was announced via Interface selection. [severity:2/4; CVE-2016-7429]

An attacker can trigger a fatal error via Client Rate Limiting, in order to trigger a denial of service. [severity:2/4; CVE-2016-7426]

An unknown vulnerability was announced via Reboot Sync. [severity:2/4; CVE-2016-7433]
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vulnerability alert CVE-2016-8864

ISC BIND: assertion error via DNAME

Synthesis of the vulnerability

An attacker can force an assertion error via DNAME of ISC BIND, in order to trigger a denial of service.
Impacted products: Debian, BIG-IP Hardware, TMOS, Fedora, FreeBSD, HP-UX, AIX, BIND, Juniper J-Series, Junos OS, SRX-Series, Data ONTAP 7-Mode, openSUSE, openSUSE Leap, Solaris, RHEL, Slackware, SUSE Linux Enterprise Desktop, SLES.
Severity: 2/4.
Consequences: denial of service on service, denial of service on client.
Provenance: internet server.
Creation date: 02/11/2016.
Identifiers: bulletinjul2018, bulletinoct2016, c05381687, CERTFR-2017-AVI-111, CVE-2016-8864, DLA-696-1, DSA-3703-1, FEDORA-2016-605fd98c32, FEDORA-2016-8e39076950, FEDORA-2016-9417b4c1dc, FEDORA-2016-e38196b52a, FreeBSD-SA-16:34.bind, HPESBUX03699, JSA10785, K35322517, NTAP-20180926-0001, NTAP-20180926-0002, NTAP-20180926-0003, NTAP-20180926-0004, NTAP-20180926-0005, NTAP-20180927-0001, openSUSE-SU-2016:2738-1, openSUSE-SU-2016:2739-1, RHSA-2016:2141-01, RHSA-2016:2142-01, RHSA-2016:2615-01, RHSA-2016:2871-01, RHSA-2017:1583-01, SOL35322517, SSA:2016-308-02, SSRT110304, SUSE-SU-2016:2696-1, SUSE-SU-2016:2697-1, SUSE-SU-2016:2706-1, VIGILANCE-VUL-20991.

Description of the vulnerability

The ISC BIND product can be configured in recursive mode.

However, if a DNS reply contains a special DNAME entry, an assertion error occurs because developers did not except this case, which stops the process.

An attacker can therefore force an assertion error via DNAME of ISC BIND, in order to trigger a denial of service.
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computer vulnerability announce CVE-2016-2776

ISC BIND: assertion error via buffer.c

Synthesis of the vulnerability

An attacker can force an assertion error via buffer.c of ISC BIND, in order to trigger a denial of service.
Impacted products: Debian, BIG-IP Hardware, TMOS, Fedora, FreeBSD, HP-UX, AIX, BIND, Juniper J-Series, Junos OS, SRX-Series, openSUSE, openSUSE Leap, Solaris, RHEL, Slackware, SUSE Linux Enterprise Desktop, SLES, Ubuntu.
Severity: 3/4.
Consequences: denial of service on service.
Provenance: internet client.
Creation date: 28/09/2016.
Identifiers: AA-01419, bulletinoct2016, c05321107, CERTFR-2017-AVI-111, CVE-2016-2776, DLA-645-1, DSA-3680-1, FEDORA-2016-2d9825f7c1, FEDORA-2016-3af8b344f1, FEDORA-2016-cbef6c8619, FEDORA-2016-cca77daf70, FreeBSD-SA-16:28.bind, JSA10785, K18829561, openSUSE-SU-2016:2406-1, RHSA-2016:1944-01, RHSA-2016:1945-01, RHSA-2016:2099-01, SOL18829561, SSA:2016-271-01, SUSE-SU-2016:2399-1, SUSE-SU-2016:2401-1, SUSE-SU-2016:2405-1, USN-3088-1, VIGILANCE-VUL-20707.

Description of the vulnerability

The ISC BIND product build replies to DNS queries in the dns_message_render*() functions of the lib/dns/message.c file.

However, the DNS_MESSAGE_HEADERLEN header size is not used to check the free space in the response to build. An assertion error thus occurs in the buffer.c file, because developers did not except this case, which stops the process.

An attacker can therefore force an assertion error via buffer.c of ISC BIND, in order to trigger a denial of service.
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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, VNX Operating Environment, VNX Series, 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 7-Mode, 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, SIMATIC, 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, CERTFR-2019-AVI-311, cisco-sa-20160927-openssl, cpuapr2017, cpujan2018, cpujul2017, cpujul2019, cpuoct2017, CVE-2016-2183, CVE-2016-6329, DSA-2018-124, DSA-2019-131, 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, SSA-556833, 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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vulnerability note CVE-2016-2775

ISC BIND: infinite loop via lwresd

Synthesis of the vulnerability

An attacker can generate an infinite loop via lwresd of ISC BIND, in order to trigger a denial of service.
Impacted products: Debian, VNX Operating Environment, VNX Series, Fedora, HP-UX, AIX, BIND, openSUSE Leap, Solaris, RHEL, Slackware, SUSE Linux Enterprise Desktop, SLES, VxWorks.
Severity: 2/4.
Consequences: denial of service on service.
Provenance: internet client.
Creation date: 19/07/2016.
Identifiers: AA-01393, bulletinjul2016, c05321107, CVE-2016-2775, DLA-645-1, DSA-2019-131, FEDORA-2016-007efacd1c, FEDORA-2016-2941b3264e, FEDORA-2016-3fba74e7f5, FEDORA-2016-53f0c65f40, openSUSE-SU-2017:1063-1, RHSA-2017:2533-01, SSA:2016-204-01, SUSE-SU-2017:0998-1, SUSE-SU-2017:0999-1, SUSE-SU-2017:1027-1, VIGILANCE-VUL-20144.

Description of the vulnerability

The ISC BIND product implements the "lightweight resolver protocol" in the lwresd daemon, or in named when named.conf contains the "lwres" section.

However, if getrrsetbyname() is called to resolve a long relative name (combined with a search list entry), an infinite recursion occurs in lwresd/lwres.

An attacker can therefore generate an infinite loop via lwresd of ISC BIND, in order to trigger a denial of service.
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vulnerability bulletin CVE-2016-1000104 CVE-2016-1000105 CVE-2016-1000107

Web servers: creating client queries via the Proxy header

Synthesis of the vulnerability

An attacker can send a query with a malicious Proxy header to a web service hosting a CGI script creating web client queries, so they go through attacker's proxy.
Impacted products: Apache httpd, Tomcat, Mac OS X, Debian, Drupal Core, VNX Operating Environment, VNX Series, eZ Publish, Fedora, HP-UX, QRadar SIEM, Junos Space, NSM Central Manager, NSMXpress, lighttpd, IIS, nginx, openSUSE, openSUSE Leap, Oracle Communications, Solaris, Perl Module ~ not comprehensive, PHP, Python, RHEL, Slackware, SUSE Linux Enterprise Desktop, SLES, Synology DSM, Synology DS***, Synology RS***, TrendMicro ServerProtect, TYPO3 Core, Ubuntu, Varnish.
Severity: 3/4.
Consequences: data reading, denial of service on service.
Provenance: internet client.
Number of vulnerabilities in this bulletin: 12.
Creation date: 18/07/2016.
Identifiers: 1117414, 1994719, 1994725, 1999671, APPLE-SA-2017-09-25-1, bulletinjul2017, bulletinoct2016, c05324759, CERTFR-2016-AVI-240, CERTFR-2017-AVI-012, CERTFR-2017-AVI-022, cpujan2018, CVE-2016-1000104, CVE-2016-1000105, CVE-2016-1000107, CVE-2016-1000108, CVE-2016-1000109, CVE-2016-1000110, CVE-2016-1000111, CVE-2016-1000212, CVE-2016-5385, CVE-2016-5386, CVE-2016-5387, CVE-2016-5388, DLA-1883-1, DLA-553-1, DLA-568-1, DLA-583-1, DLA-749-1, DRUPAL-SA-CORE-2016-003, DSA-2019-131, DSA-3623-1, DSA-3631-1, DSA-3642-1, EZSA-2016-001, FEDORA-2016-07e9059072, FEDORA-2016-2c324d0670, FEDORA-2016-340e361b90, FEDORA-2016-4094bd4ad6, FEDORA-2016-4e7db3d437, FEDORA-2016-604616dc33, FEDORA-2016-683d0b257b, FEDORA-2016-970edb82d4, FEDORA-2016-9c8cf5912c, FEDORA-2016-9de7253cc7, FEDORA-2016-9fd814a7f2, FEDORA-2016-9fd9bfab9e, FEDORA-2016-a29c65b00f, FEDORA-2016-aef8a45afe, FEDORA-2016-c1b01b9278, FEDORA-2016-df0726ae26, FEDORA-2016-e2c8f5f95a, FEDORA-2016-ea5e284d34, HPSBUX03665, HT207615, HT208144, HT208221, httpoxy, JSA10770, JSA10774, openSUSE-SU-2016:1824-1, openSUSE-SU-2016:2054-1, openSUSE-SU-2016:2055-1, openSUSE-SU-2016:2115-1, openSUSE-SU-2016:2120-1, openSUSE-SU-2016:2252-1, openSUSE-SU-2016:2536-1, openSUSE-SU-2016:3092-1, openSUSE-SU-2016:3157-1, openSUSE-SU-2017:0223-1, RHSA-2016:1420-01, RHSA-2016:1421-01, RHSA-2016:1422-01, RHSA-2016:1538-01, RHSA-2016:1609-01, RHSA-2016:1610-01, RHSA-2016:1611-01, RHSA-2016:1612-01, RHSA-2016:1613-01, RHSA-2016:1624-01, RHSA-2016:1626-01, RHSA-2016:1627-01, RHSA-2016:1628-01, RHSA-2016:1629-01, RHSA-2016:1630-01, RHSA-2016:1635-01, RHSA-2016:1636-01, RHSA-2016:1648-01, RHSA-2016:1649-01, RHSA-2016:1650-01, RHSA-2016:1978-01, RHSA-2016:2045-01, RHSA-2016:2046-01, SSA:2016-203-02, SSA:2016-358-01, SSA:2016-363-01, SUSE-SU-2017:1632-1, SUSE-SU-2017:1660-1, SUSE-SU-2019:0223-1, USN-3038-1, USN-3045-1, USN-3134-1, USN-3177-1, USN-3177-2, USN-3585-1, VIGILANCE-VUL-20143, VU#797896.

Description of the vulnerability

Most web servers support CGI scripts (PHP, Python, etc.).

According to the RFC 3875, when a web server receives a Proxy header, it has to create the HTTP_PROXY environment variable for CGI scripts.

However, this variable is also used to store the name of the proxy that web clients has to use. The PHP (via Guzzle, Artax, etc.) and Python scripts will thus use the proxy indicated in the web query for all client queries they will send during the CGI session.

An attacker can therefore send a query with a malicious Proxy header to a web service hosting a CGI script creating web client queries, so they go through attacker's proxy.
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