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 McAfee Web Gateway

computer vulnerability CVE-2017-1000367 CVE-2017-1000368

sudo: privilege escalation via the parsing of /proc/pid/stat

Synthesis of the vulnerability

A local attacker can tamper with the parsing of /proc/[pid]/stat by sudo, in order to escalate his privileges.
Impacted products: Debian, Fedora, Junos Space, McAfee Web Gateway, openSUSE Leap, RHEL, Slackware, Sudo, SUSE Linux Enterprise Desktop, SLES, Synology DSM, Synology DS***, Synology RS***, InterScan Messaging Security Suite, Ubuntu, WindRiver Linux.
Severity: 2/4.
Creation date: 30/05/2017.
Revision date: 15/06/2017.
Identifiers: 1117723, CERTFR-2017-AVI-238, CERTFR-2017-AVI-365, CVE-2017-1000367, CVE-2017-1000368, DLA-1011-1, DLA-970-1, DSA-3867-1, FEDORA-2017-54580efa82, FEDORA-2017-8b250ebe97, FEDORA-2017-facd994774, JSA10824, JSA10826, openSUSE-SU-2017:1455-1, openSUSE-SU-2017:1697-1, RHSA-2017:1381-01, RHSA-2017:1382-01, RHSA-2017:1574-01, SB10205, SSA:2017-150-01, SUSE-SU-2017:1446-1, SUSE-SU-2017:1450-1, SUSE-SU-2017:1626-1, SUSE-SU-2017:1627-1, SUSE-SU-2017:1778-1, Synology-SA-17:19, USN-3304-1, VIGILANCE-VUL-22865.

Description of the vulnerability

The sudo product looks for its controlling tty.

Fot that, it reads the file /proc/pid/stat. However, the parsing of this file is wrong. An attacker can tamper with the program path to make sudo write into any file with root privileges.

A local attacker can therefore tamper with the parsing of /proc/[pid]/stat by sudo, in order to escalate his privileges.
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computer vulnerability announce CVE-2016-9042 CVE-2017-6451 CVE-2017-6452

NTP.org: multiple vulnerabilities

Synthesis of the vulnerability

An attacker can use several vulnerabilities of NTP.org.
Impacted products: Mac OS X, Blue Coat CAS, BIG-IP Hardware, TMOS, Fedora, FreeBSD, AIX, McAfee Web Gateway, Meinberg NTP Server, NetBSD, NTP.org, Solaris, Palo Alto Firewall PA***, PAN-OS, pfSense, RHEL, Slackware, Spectracom SecureSync, Symantec Content Analysis, Synology DSM, Synology DS***, Synology RS***, Ubuntu, VxWorks.
Severity: 2/4.
Creation date: 22/03/2017.
Revision date: 30/03/2017.
Identifiers: APPLE-SA-2017-09-25-1, bulletinapr2017, CVE-2016-9042, CVE-2017-6451, CVE-2017-6452, CVE-2017-6455, CVE-2017-6458, CVE-2017-6459, CVE-2017-6460, CVE-2017-6462, CVE-2017-6463, CVE-2017-6464, FEDORA-2017-5ebac1c112, FEDORA-2017-72323a442f, FreeBSD-SA-17:03.ntp, HT208144, K02951273, K07082049, K32262483, K-511308, K99254031, NTP-01-002, NTP-01-003, NTP-01-004, NTP-01-007, NTP-01-008, NTP-01-009, NTP-01-012, NTP-01-014, NTP-01-016, PAN-SA-2017-0022, RHSA-2017:3071-01, RHSA-2018:0855-01, SA147, SB10201, SSA:2017-112-02, TALOS-2016-0260, USN-3349-1, VIGILANCE-VUL-22217, VU#633847.

Description of the vulnerability

Several vulnerabilities were announced in NTP.org.

An attacker can tamper with packet timestamp, in order to make target trafic dropped. [severity:2/4; CVE-2016-9042]

An attacker can generate a buffer overflow via ntpq, in order to trigger a denial of service, and possibly to run code. [severity:2/4; CVE-2017-6460, NTP-01-002]

An attacker can generate a buffer overflow via mx4200_send(), in order to trigger a denial of service, and possibly to run code. [severity:1/4; CVE-2017-6451, NTP-01-003]

An attacker can generate a buffer overflow via ctl_put(), in order to trigger a denial of service, and possibly to run code. [severity:2/4; CVE-2017-6458, NTP-01-004]

An attacker can generate a buffer overflow via addKeysToRegistry(), in order to trigger a denial of service, and possibly to run code. [severity:1/4; CVE-2017-6459, NTP-01-007]

An attacker can generate a buffer overflow in the MS-Windows installer, in order to trigger a denial of service, and possibly to run code. [severity:1/4; CVE-2017-6452, NTP-01-008]

An attacker can define the PPSAPI_DLLS environment variable, in order to make the server run a library with hight privileges. [severity:2/4; CVE-2017-6455, NTP-01-009]

An authenticated attacker can submit an invalid configuration directive, to trigger a denial of service. [severity:2/4; CVE-2017-6463, NTP-01-012]

A privileged attacker can generate a buffer overflow via datum_pts_receive(), in order to trigger a denial of service, and possibly to run code. [severity:1/4; CVE-2017-6462, NTP-01-014]

An authenticated attacker can submit an invalid configuration directive "mode", to trigger a denial of service. [severity:2/4; CVE-2017-6464, NTP-01-016]
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computer vulnerability alert CVE-2016-5696

Linux kernel: injecting TCP packets via Challenge ACK

Synthesis of the vulnerability

An attacker can predict the sequence of a TCP session performed to a Linux server, in order to inject a TCP packet, which can interact with the session if it is not encrypted.
Impacted products: Blue Coat CAS, Debian, BIG-IP Hardware, TMOS, Fedora, FortiAnalyzer, FortiAnalyzer Virtual Appliance, FortiGate, FortiGate Virtual Appliance, FortiOS, Android OS, NSM Central Manager, NSMXpress, Linux, McAfee Web Gateway, openSUSE, openSUSE Leap, PAN-OS, RHEL, Slackware, SUSE Linux Enterprise Desktop, SLES, Ubuntu.
Severity: 3/4.
Creation date: 12/07/2016.
Identifiers: CERTFR-2016-AVI-287, CERTFR-2016-AVI-289, CERTFR-2017-AVI-001, CERTFR-2017-AVI-044, CERTFR-2017-AVI-053, CERTFR-2017-AVI-131, CVE-2016-5389-REJECT, CVE-2016-5696, DLA-609-1, DSA-3659-1, FEDORA-2016-784d5526d8, FEDORA-2016-9a16b2e14e, FG-IR-16-047, FG-IR-16-048, FG-IR-16-050, FG-IR-17-127, JSA10853, openSUSE-SU-2016:2290-1, openSUSE-SU-2016:2625-1, openSUSE-SU-2016:3021-1, PAN-SA-2017-0015, RHSA-2016:1631-01, RHSA-2016:1632-01, RHSA-2016:1633-01, RHSA-2016:1657-01, RHSA-2016:1664-01, RHSA-2016:1814-01, RHSA-2016:1815-01, RHSA-2016:1939-01, SA131, SB10167, SOL46514822, SSA:2016-236-03, SSA:2016-242-01, SUSE-SU-2016:2245-1, SUSE-SU-2016:2912-1, SUSE-SU-2016:2976-1, SUSE-SU-2016:3069-1, SUSE-SU-2016:3304-1, SUSE-SU-2017:0437-1, SUSE-SU-2017:0471-1, SUSE-SU-2017:1102-1, USN-3070-1, USN-3070-2, USN-3070-3, USN-3070-4, USN-3071-1, USN-3071-2, USN-3072-1, USN-3072-2, VIGILANCE-VUL-20066.

Description of the vulnerability

The Linux kernel implements the RFC 5961 (Improving TCP's Robustness to Blind In-Window Attacks).

However, this implementation provides information which can be used to inject a TCP packet in an active session, but without receiving the TCP reply.

In order to do so, the attacker has to know,
 - the IP address and the TCP port number of the server
 - the IP address of a client with an active session

An attacker can therefore predict the sequence of a TCP session performed to a Linux server, in order to inject a TCP packet, which can interact with the session if it is not encrypted.
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computer vulnerability announce CVE-2016-1834 CVE-2016-1835 CVE-2016-1836

libxml2: multiple vulnerabilities

Synthesis of the vulnerability

An attacker can use several vulnerabilities of libxml2.
Impacted products: iOS by Apple, iPhone, Mac OS X, Blue Coat CAS, ProxyAV, ProxyRA, ProxySG par Blue Coat, SGOS by Blue Coat, Debian, BIG-IP Hardware, TMOS, Fedora, Junos Space, NSM Central Manager, NSMXpress, McAfee Web Gateway, openSUSE, openSUSE Leap, RHEL, SLES, Nessus, Ubuntu.
Severity: 3/4.
Creation date: 03/06/2016.
Identifiers: CERTFR-2017-AVI-012, CERTFR-2017-AVI-022, CVE-2016-1834, CVE-2016-1835, CVE-2016-1836, CVE-2016-1837, CVE-2016-1840, DLA-503-1, DSA-3593-1, FEDORA-2017-a3a47973eb, FEDORA-2017-be8574d593, HT206567, HT206568, HT206902, HT206903, JSA10770, JSA10774, K14614344, K16712298, K48220300, openSUSE-SU-2016:1594-1, openSUSE-SU-2016:1595-1, RHSA-2016:1292-01, SA129, SB10170, SUSE-SU-2016:1538-1, SUSE-SU-2016:1604-1, TNS-2017-03, USN-2994-1, VIGILANCE-VUL-19787.

Description of the vulnerability

Several vulnerabilities were announced in libxml2.

An attacker can generate a memory corruption, in order to trigger a denial of service, and possibly to run code. [severity:3/4; CVE-2016-1834]

An attacker can generate a memory corruption, in order to trigger a denial of service, and possibly to run code. [severity:3/4; CVE-2016-1835]

An attacker can generate a memory corruption, in order to trigger a denial of service, and possibly to run code. [severity:3/4; CVE-2016-1836]

An attacker can generate a memory corruption, in order to trigger a denial of service, and possibly to run code. [severity:3/4; CVE-2016-1837]

An attacker can generate a memory corruption, in order to trigger a denial of service, and possibly to run code. [severity:3/4; CVE-2016-1840]
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vulnerability note CVE-2016-4447 CVE-2016-4448 CVE-2016-4449

libxml2: three vulnerabilities

Synthesis of the vulnerability

An attacker can use several vulnerabilities of libxml2.
Impacted products: iOS by Apple, iPhone, Mac OS X, Blue Coat CAS, ProxyAV, ProxyRA, ProxySG par Blue Coat, SGOS by Blue Coat, Debian, BIG-IP Hardware, TMOS, Fedora, Junos Space, libxml, McAfee Web Gateway, openSUSE Leap, Oracle Communications, RHEL, Slackware, Splunk Enterprise, SLES, Nessus, Ubuntu.
Severity: 2/4.
Creation date: 25/05/2016.
Identifiers: 1989337, 1991909, 1991910, 1991911, 1991913, 1991997, CERTFR-2017-AVI-012, cpujan2018, CVE-2016-4447, CVE-2016-4448, CVE-2016-4449, DLA-503-1, DSA-3593-1, FEDORA-2017-a3a47973eb, FEDORA-2017-be8574d593, HT206902, HT206903, JSA10770, K24322529, K41103561, openSUSE-SU-2016:1595-1, RHSA-2016:1292-01, SA129, SB10170, SOL41103561, SPL-119440, SPL-121159, SPL-123095, SSA:2016-148-01, SUSE-SU-2016:1538-1, SUSE-SU-2016:1604-1, TNS-2017-03, USN-2994-1, USN-3235-1, VIGILANCE-VUL-19694.

Description of the vulnerability

Several vulnerabilities were announced in libxml2.

An attacker can force a read at an invalid address via xmlParseName, in order to trigger a denial of service, or to obtain sensitive information. [severity:1/4; CVE-2016-4447]

An attacker can use a format string attack, in order to trigger a denial of service, and possibly to run code. [severity:2/4; CVE-2016-4448]

An attacker can generate a memory corruption via Entities Content, in order to trigger a denial of service, and possibly to run code. [severity:2/4; CVE-2016-4449]
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vulnerability bulletin CVE-2016-3705

libxml2: infinite loop of xmlParserEntityCheck

Synthesis of the vulnerability

An attacker can generate an infinite recursion in xmlStringGetNodeList() of libxml2, in order to trigger a denial of service.
Impacted products: Blue Coat CAS, ProxyAV, ProxyRA, ProxySG par Blue Coat, SGOS by Blue Coat, Debian, BIG-IP Hardware, TMOS, Junos Space, libxml, McAfee Web Gateway, openSUSE, openSUSE Leap, RHEL, Splunk Enterprise, SLES, Nessus, Ubuntu.
Severity: 2/4.
Creation date: 03/05/2016.
Identifiers: 765207, CERTFR-2017-AVI-012, CVE-2016-3705, DLA-503-1, DSA-3593-1, JSA10770, openSUSE-SU-2016:1446-1, openSUSE-SU-2016:1594-1, openSUSE-SU-2016:1595-1, RHSA-2016:1292-01, SA129, SB10170, SOL54225343, SPL-119440, SPL-121159, SPL-123095, SUSE-SU-2016:1538-1, SUSE-SU-2016:1604-1, TNS-2017-03, USN-2994-1, VIGILANCE-VUL-19513.

Description of the vulnerability

The libxml2 library includes an XML parser.

However, a malformed document triggers an infinite recursion in the xmlParserEntityCheck(), xmlParseEntityValue() and xmlParseAttValueComplex() functions, which depletes the stack.

An attacker can therefore generate an infinite recursion in xmlStringGetNodeList() of libxml2, in order to trigger a denial of service.
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vulnerability alert CVE-2016-3627

libxml2: infinite loop of xmlStringGetNodeList

Synthesis of the vulnerability

An attacker can generate an infinite recursion in xmlStringGetNodeList() of libxml2, in order to trigger a denial of service.
Impacted products: Blue Coat CAS, ProxyAV, ProxyRA, ProxySG par Blue Coat, SGOS by Blue Coat, Debian, BIG-IP Hardware, TMOS, Junos Space, libxml, McAfee Web Gateway, openSUSE, openSUSE Leap, Solaris, RHEL, Splunk Enterprise, Nessus, Ubuntu.
Severity: 1/4.
Creation date: 21/03/2016.
Revision date: 03/05/2016.
Identifiers: 1989337, 1991909, 1991910, 1991911, 1991913, 1991997, 762100, bulletinjul2016, CERTFR-2017-AVI-012, CVE-2016-3627, DLA-503-1, DSA-3593-1, JSA10770, openSUSE-SU-2016:1298-1, openSUSE-SU-2016:1446-1, openSUSE-SU-2016:1594-1, RHSA-2016:1292-01, SA129, SB10170, SOL54225343, SPL-119440, SPL-121159, SPL-123095, TNS-2017-03, USN-2994-1, VIGILANCE-VUL-19201.

Description of the vulnerability

The xmllint tool of libxml2 has the option "--recover" to try to decode a malformed XML document.

However, a malformed document triggers an infinite recursion in the xmlStringGetNodeList() function, which depletes the stack.

An attacker can therefore generate an infinite recursion in xmlStringGetNodeList() of libxml2, in order to trigger a denial of service.
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computer vulnerability announce CVE-2015-7704 CVE-2015-8138 CVE-2016-1547

NTP.org: multiple vulnerabilities

Synthesis of the vulnerability

An attacker can use several vulnerabilities of NTP.org.
Impacted products: SNS, ASA, Cisco Catalyst, IOS by Cisco, IOS XE Cisco, IronPort Encryption, Nexus by Cisco, NX-OS, Cisco Prime Access Registrar, Prime Collaboration Assurance, Prime Infrastructure, Cisco Prime LMS, Cisco Router, Secure ACS, Cisco CUCM, Cisco MeetingPlace, Cisco Unity ~ precise, XenServer, Debian, BIG-IP Hardware, TMOS, Fedora, FreeBSD, HP Switch, AIX, Juniper J-Series, Junos OS, Junos Space, McAfee Web Gateway, Meinberg NTP Server, NTP.org, openSUSE, openSUSE Leap, Oracle Communications, Solaris, Palo Alto Firewall PA***, PAN-OS, pfSense, RHEL, Slackware, Spectracom SecureSync, SUSE Linux Enterprise Desktop, SLES, Synology DSM, Synology DS***, Synology RS***, Ubuntu.
Severity: 2/4.
Creation date: 27/04/2016.
Identifiers: bulletinapr2016, c05270839, CERTFR-2016-AVI-153, CERTFR-2017-AVI-365, cisco-sa-20160428-ntpd, cpujan2018, CTX220112, CVE-2015-7704, CVE-2015-8138, CVE-2016-1547, CVE-2016-1548, CVE-2016-1549, CVE-2016-1550, CVE-2016-1551, CVE-2016-2516, CVE-2016-2517, CVE-2016-2518, CVE-2016-2519, DLA-559-1, DSA-3629-1, FEDORA-2016-5b2eb0bf9c, FEDORA-2016-777d838c1b, FEDORA-2018-70c191d84a, FEDORA-2018-de113aeac6, FreeBSD-SA-16:16.ntp, HPESBHF03750, HPSBHF03646, JSA10776, JSA10796, JSA10824, JSA10826, K11251130, K20804323, K24613253, K43205719, K63675293, MBGSA-1602, openSUSE-SU-2016:1292-1, openSUSE-SU-2016:1329-1, openSUSE-SU-2016:1423-1, openSUSE-SU-2018:0970-1, PAN-SA-2016-0019, RHSA-2016:1141-01, RHSA-2016:1552-01, SB10164, SOL11251130, SOL20804323, SOL24613253, SOL41613034, SOL43205719, SOL45427159, SOL61200338, SOL63675293, SSA:2016-120-01, STORM-2016-003, STORM-2016-004, SUSE-SU-2016:1175-1, SUSE-SU-2016:1177-1, SUSE-SU-2016:1247-1, SUSE-SU-2016:1278-1, SUSE-SU-2016:1291-1, SUSE-SU-2016:1311-1, SUSE-SU-2016:1471-1, SUSE-SU-2016:1912-1, SUSE-SU-2016:2094-1, SUSE-SU-2018:1464-1, SUSE-SU-2018:1765-1, Synology-SA-18:13, Synology-SA-18:14, TALOS-2016-0081, TALOS-2016-0082, TALOS-2016-0083, TALOS-2016-0084, TALOS-2016-0132, USN-3096-1, USN-3349-1, VIGILANCE-VUL-19477, VU#718152.

Description of the vulnerability

Several vulnerabilities were announced in NTP.org.

The ntpd daemon can on certain systems accept packets from 127.0.0.0/8. [severity:1/4; CVE-2016-1551, TALOS-2016-0132]

An attacker can use a Sybil attack, in order to alter the system clock. [severity:2/4; CVE-2016-1549, TALOS-2016-0083]

An attacker can force an assertion error with duplicate IP, in order to trigger a denial of service. [severity:2/4; CVE-2016-2516]

An attacker can trigger an error in the management of trustedkey/requestkey/controlkey, in order to trigger a denial of service. [severity:2/4; CVE-2016-2517]

An attacker can force a read at an invalid address in MATCH_ASSOC, in order to trigger a denial of service, or to obtain sensitive information. [severity:1/4; CVE-2016-2518]

An attacker can trigger a fatal error in ctl_getitem(), in order to trigger a denial of service. [severity:2/4; CVE-2016-2519]

An attacker can send a malicious CRYPTO-NAK packet, in order to trigger a denial of service. [severity:2/4; CVE-2016-1547, TALOS-2016-0081]

An attacker can use Interleave-pivot, in order to alter a client time. [severity:2/4; CVE-2016-1548, TALOS-2016-0082]

An attacker can trigger a fatal error in the ntp client, in order to trigger a denial of service. [severity:2/4; CVE-2015-7704]

The Zero Origin Timestamp value is not correctly checked. [severity:2/4; CVE-2015-8138]

An attacker can measure the comparison execution time, in order to guess a hash. [severity:2/4; CVE-2016-1550, TALOS-2016-0084]
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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, IRAD, Rational ClearCase, QRadar SIEM, Tivoli Storage Manager, Tivoli Workload Scheduler, WebSphere MQ, Copssh, Juniper J-Series, Junos OS, Junos Space, Juniper Network Connect, NSM Central Manager, NSMXpress, McAfee Web Gateway, Meinberg NTP Server, Data ONTAP, Snap Creator Framework, NetScreen Firewall, ScreenOS, 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 Grid Manager, 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, WindRiver Linux, VxWorks, X2GoClient.
Severity: 2/4.
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, 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, 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, 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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computer vulnerability announce CVE-2016-1839

libxml2: unreachable memory reading via xmlDictAddString

Synthesis of the vulnerability

An attacker can invite the victim to open a malicious XML document, with an application linked with libxml2, to force a read at an invalid address in the xmlDictAddString() function, in order to trigger a denial of service.
Impacted products: iOS by Apple, iPhone, Mac OS X, Blue Coat CAS, ProxyAV, ProxyRA, ProxySG par Blue Coat, SGOS by Blue Coat, Debian, BIG-IP Hardware, TMOS, Fedora, Android OS, Junos Space, libxml, McAfee Web Gateway, openSUSE, openSUSE Leap, RHEL, Splunk Enterprise, SLES, Nessus, Ubuntu.
Severity: 2/4.
Creation date: 23/02/2016.
Identifiers: CERTFR-2017-AVI-012, CVE-2016-1839, DLA-503-1, DSA-3593-1, FEDORA-2017-a3a47973eb, FEDORA-2017-be8574d593, HT206567, HT206568, JSA10770, K26422113, openSUSE-SU-2016:1594-1, openSUSE-SU-2016:1595-1, openSUSE-SU-2017:1510-1, RHSA-2016:1292-01, SA129, SB10170, SPL-119440, SPL-121159, SPL-123095, SUSE-SU-2016:1538-1, SUSE-SU-2016:1604-1, TNS-2017-03, USN-2994-1, VIGILANCE-VUL-19007.

Description of the vulnerability

The libxml2 library includes an XML parser.

However, malformed XML data force the xmlDictAddString() function to read an unreachable memory area, which triggers a fatal error.

An attacker can therefore invite the victim to open a malicious XML document, with an application linked with libxml2, to force a read at an invalid address in the xmlDictAddString() function, in order to trigger a denial of service.
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