Vulnerability Name:

CVE-2016-7943 (CCN-117542)

Assigned:2016-10-04
Published:2016-10-04
Updated:2018-09-13
Summary:The XListFonts function in X.org libX11 before 1.6.4 might allow remote X servers to gain privileges via vectors involving length fields, which trigger out-of-bounds write operations.
CVSS v3 Severity:9.8 Critical (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
8.5 High (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): High
Integrity (I): High
Availibility (A): High
7.3 High (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L)
6.4 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): Low
Integrity (I): Low
Availibility (A): Low
CVSS v2 Severity:7.5 High (CVSS v2 Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Authentication (Au): None
Impact Metrics:Confidentiality (C): Partial
Integrity (I): Partial
Availibility (A): Partial
7.5 High (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): Partial
Integrity (I): Partial
Availibility (A): Partial
Vulnerability Type:CWE-787
Vulnerability Consequences:Gain Access
References:Source: MITRE
Type: CNA
CVE-2016-7943

Source: CCN
Type: IBM Security Bulletin 843434 (API Connect)
IBM API Connect has addressed multiple vulnerabilities in Developer Portal's dependencies - Cumulative list from June 28, 2018 to December 13, 2018

Source: MLIST
Type: Mailing List, Third Party Advisory
[oss-security] 20161004 X.Org security advisory: Protocol handling issues in X Window System client libraries

Source: MLIST
Type: Mailing List, Patch, Third Party Advisory
[oss-security] 20161004 Re: X.Org security advisory: Protocol handling issues in X Window System client libraries

Source: BID
Type: Third Party Advisory, VDB Entry
93362

Source: CCN
Type: BID-93362
X.Org libX11 CVE-2016-7943 Memory Corruption Vulnerability

Source: SECTRACK
Type: Third Party Advisory, VDB Entry
1036945

Source: CONFIRM
Type: Issue Tracking, Patch
https://cgit.freedesktop.org/xorg/lib/libX11/commit/?id=8c29f1607a31dac0911e45a0dd3d74173822b3c9

Source: XF
Type: UNKNOWN
libx11-cve20167943-code-exec(117542)

Source: FEDORA
Type: Third Party Advisory
FEDORA-2016-0df69ab477

Source: CCN
Type: X.Org security advisory: October 4, 2016
Protocol handling issues in X Window System client libraries

Source: MLIST
Type: Vendor Advisory
[xorg-announce] 20161004 X.Org security advisory: Protocol handling issues in X Window System client libraries

Source: GENTOO
Type: UNKNOWN
GLSA-201704-03

Source: UBUNTU
Type: UNKNOWN
USN-3758-1

Source: UBUNTU
Type: UNKNOWN
USN-3758-2

Source: CCN
Type: WhiteSource Vulnerability Database
CVE-2016-7943

Vulnerable Configuration:Configuration 1:
  • cpe:/o:fedoraproject:fedora:25:*:*:*:*:*:*:*

    • Configuration 2:
  • cpe:/a:x.org:libx11:*:*:*:*:*:*:*:* (Version <= 1.6.3)

    • Configuration CCN 1:
  • cpe:/a:x.org:libx11:1.6.2:*:*:*:*:*:*:*
  • AND
  • cpe:/a:ibm:api_connect:5.0.8.0:*:*:*:*:*:*:*
  • OR cpe:/a:ibm:api_connect:5.0.8.4:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:com.ubuntu.artful:def:20167943000
    V
    		CVE-2016-7943 on Ubuntu 17.10 (artful) - low.
    2016-12-13
    oval:com.ubuntu.xenial:def:20167943000
    V
    		CVE-2016-7943 on Ubuntu 16.04 LTS (xenial) - low.
    2016-12-13
    oval:com.ubuntu.bionic:def:20167943000
    V
    		CVE-2016-7943 on Ubuntu 18.04 LTS (bionic) - low.
    2016-12-13
    oval:com.ubuntu.bionic:def:201679430000000
    V
    		CVE-2016-7943 on Ubuntu 18.04 LTS (bionic) - low.
    2016-12-13
    oval:com.ubuntu.precise:def:20167943000
    V
    		CVE-2016-7943 on Ubuntu 12.04 LTS (precise) - low.
    2016-12-13
    oval:com.ubuntu.xenial:def:201679430000000
    V
    		CVE-2016-7943 on Ubuntu 16.04 LTS (xenial) - low.
    2016-12-13
    oval:com.ubuntu.trusty:def:20167943000
    V
    		CVE-2016-7943 on Ubuntu 14.04 LTS (trusty) - low.
    2016-12-13
    BACK
    fedoraproject fedora 25
    x.org libx11 *
    x.org libx11 1.6.2
    ibm api connect 5.0.8.0
    ibm api connect 5.0.8.4