CVE-2016-7943
published 2016-12-13CVE-2016-7943: 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…
PriorityP352critical9.8CVSS 3.0
AVNACLPRNUINSUCHIHAH
EPSS
4.29%
89.9th percentile
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.
Affected
10 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | libx11 | < libx11 2:1.6.4-1 (bookworm) | libx11 2:1.6.4-1 (bookworm) |
| fedoraproject | fedora | — | — |
| x.org | libx11 | <= 1.6.3 | — |
| x.org | libx11 | >= 0 < 2:1.6.4-1 | 2:1.6.4-1 |
| x.org | libx11 | >= 0 < 2:1.6.4-1 | 2:1.6.4-1 |
| x.org | libx11 | >= 0 < 2:1.6.4-1 | 2:1.6.4-1 |
| x.org | libx11 | >= 0 < 2:1.6.4-1 | 2:1.6.4-1 |
| x.org | libx11 | >= 0 < 2:1.6.2-1ubuntu2.1 | 2:1.6.2-1ubuntu2.1 |
| x.org | libx11 | >= 0 < 2:1.6.3-1ubuntu2.1 | 2:1.6.3-1ubuntu2.1 |
| x.org | libx11 | >= 0 < 2:1.6.4-3ubuntu0.1 | 2:1.6.4-3ubuntu0.1 |
CVSS provenance
nvdv3.09.8CRITICALCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
nvdv2.07.5HIGHAV:N/AC:L/Au:N/C:P/I:P/A:P
osv9.8CRITICAL
vendor_debian9.8LOW
vendor_redhat9.8CRITICAL
vendor_ubuntu9.8CRITICAL
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Ubuntu
libx11 vulnerabilities
vendor_ubuntu·2018-08-30·CVSS 9.8
CVE-2016-7942 [CRITICAL] libx11 vulnerabilities
Title: libx11 vulnerabilities
Summary: Several security issues were fixed in libx11.
Tobias Stoeckmann discovered that libx11 incorrectly handled certain images.
An attacker could possibly use this issue to access sensitive information
(CVE-2016-7942)
Tobias Stoeckmann discovered that libx11 incorrectly handled certain inputs.
An attacker could possibly use this issue to access sensitive information.
(CVE-2016-7943)
It was discovered that libx11 incorrectly handled certain inputs.
An attacker could possibly use this issue to cause a denial of service.
(CVE-2018-14598, CVE-2018-14599, CVE-2018-14600)
Instructions: After a standard system update you need to reboot your computer to make
all the necessary changes.
Ubuntu
libx11 vulnerabilities
vendor_ubuntu·2018-08-30·CVSS 9.8
CVE-2016-7942 [CRITICAL] libx11 vulnerabilities
Title: libx11 vulnerabilities
Summary: Several security issues were fixed in libx11.
USN-3758-1 fixed several vulnerabilities in libx11. This update provides
the corresponding update for Ubuntu 12.04 ESM.
Original advisory details:
Tobias Stoeckmann discovered that libx11 incorrectly handled certain images.
An attacker could possibly use this issue to access sensitive information
(CVE-2016-7942)
Tobias Stoeckmann discovered that libx11 incorrectly handled certain inputs.
An attacker could possibly use this issue to access sensitive information.
(CVE-2016-7943)
It was discovered that libx11 incorrectly handled certain inputs.
An attacker could possibly use this issue to cause a denial of service.
(CVE-2018-14598, CVE-2018-14599, CVE-2018-14600)
Instructions: After a standard system u
Red Hat
libX11: Insufficient validation of server responses in FontNames
vendor_redhat·2016-09-25·CVSS 9.8
CVE-2016-7943 [CRITICAL] libX11: Insufficient validation of server responses in FontNames
libX11: Insufficient validation of server responses in FontNames
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.
Package: libX11 (Red Hat Enterprise Linux 5) - Will not fix
Package: libX11 (Red Hat Enterprise Linux 6) - Will not fix
Package: libX11 (Red Hat Enterprise Linux 7) - Will not fix
Debian
CVE-2016-7943: libx11 - The XListFonts function in X.org libX11 before 1.6.4 might allow remote X server...
vendor_debian·2016·CVSS 9.8
CVE-2016-7943 [CRITICAL] CVE-2016-7943: libx11 - The XListFonts function in X.org libX11 before 1.6.4 might allow remote X server...
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.
Scope: local
bookworm: resolved (fixed in 2:1.6.4-1)
bullseye: resolved (fixed in 2:1.6.4-1)
forky: resolved (fixed in 2:1.6.4-1)
sid: resolved (fixed in 2:1.6.4-1)
trixie: resolved (fixed in 2:1.6.4-1)
GHSA
GHSA-84fh-jqg7-vh26: The XListFonts function in X
ghsa_unreviewed·2022-05-14
CVE-2016-7943 [CRITICAL] CWE-787 GHSA-84fh-jqg7-vh26: The XListFonts function in X
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.
OSV
libx11 vulnerabilities
osv·2018-08-30·CVSS 9.8
CVE-2016-7942 [CRITICAL] libx11 vulnerabilities
libx11 vulnerabilities
Tobias Stoeckmann discovered that libx11 incorrectly handled certain images.
An attacker could possibly use this issue to access sensitive information
(CVE-2016-7942)
Tobias Stoeckmann discovered that libx11 incorrectly handled certain inputs.
An attacker could possibly use this issue to access sensitive information.
(CVE-2016-7943)
It was discovered that libx11 incorrectly handled certain inputs.
An attacker could possibly use this issue to cause a denial of service.
(CVE-2018-14598, CVE-2018-14599, CVE-2018-14600)
OSV
CVE-2016-7943: The XListFonts function in X
osv·2016-12-13·CVSS 9.8
CVE-2016-7943 [CRITICAL] CVE-2016-7943: The XListFonts function in X
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.
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2016-7943 libX11: Insufficient validation of server responses in FontNames
bugzilla·2016-10-05·CVSS 9.8
CVE-2016-7943 [CRITICAL] CVE-2016-7943 libX11: Insufficient validation of server responses in FontNames
CVE-2016-7943 libX11: Insufficient validation of server responses in FontNames
It was found that when receiving a response from the server protocol data is not validated sufficiently.
Upstream patch:
https://cgit.freedesktop.org/xorg/lib/libX11/commit/?id=8c29f1607a31dac0911e45a0dd3d74173822b3c9
External References:
https://lists.x.org/archives/xorg-announce/2016-October/002720.html
CVE assignment:
http://seclists.org/oss-sec/2016/q4/17
Discussion:
Created libX11 tracking bugs for this issue:
Affects: fedora-all [bug 1381863]
Bugzilla
CVE-2016-7942 CVE-2016-7943 libX11: various flaws [fedora-all]
bugzilla·2016-10-05·CVSS 9.8
CVE-2016-7942 [CRITICAL] CVE-2016-7942 CVE-2016-7943 libX11: various flaws [fedora-all]
CVE-2016-7942 CVE-2016-7943 libX11: various flaws [fedora-all]
This is an automatically created tracking bug! It was created to ensure
that one or more security vulnerabilities are fixed in affected versions
of Fedora.
For comments that are specific to the vulnerability please use bugs filed
against the "Security Response" product referenced in the "Blocks" field.
For more information see:
http://fedoraproject.org/wiki/Security/TrackingBugs
When submitting as an update, use the fedpkg template provided in the next
comment(s). This will include the bug IDs of this tracking bug as well as
the relevant top-level CVE bugs.
Please also mention the CVE IDs being fixed in the RPM changelog and the
fedpkg commit message.
NOTE: this issue affects multiple supported versions of Fedora. While o
http://www.openwall.com/lists/oss-security/2016/10/04/2http://www.openwall.com/lists/oss-security/2016/10/04/4http://www.securityfocus.com/bid/93362http://www.securitytracker.com/id/1036945https://cgit.freedesktop.org/xorg/lib/libX11/commit/?id=8c29f1607a31dac0911e45a0dd3d74173822b3c9https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GMCVDXMFPXR7QGMKDG22WPPJCXH2X3L7/https://lists.x.org/archives/xorg-announce/2016-October/002720.htmlhttps://security.gentoo.org/glsa/201704-03https://usn.ubuntu.com/3758-1/https://usn.ubuntu.com/3758-2/http://www.openwall.com/lists/oss-security/2016/10/04/2http://www.openwall.com/lists/oss-security/2016/10/04/4http://www.securityfocus.com/bid/93362http://www.securitytracker.com/id/1036945https://cgit.freedesktop.org/xorg/lib/libX11/commit/?id=8c29f1607a31dac0911e45a0dd3d74173822b3c9https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GMCVDXMFPXR7QGMKDG22WPPJCXH2X3L7/https://lists.x.org/archives/xorg-announce/2016-October/002720.htmlhttps://security.gentoo.org/glsa/201704-03https://usn.ubuntu.com/3758-1/https://usn.ubuntu.com/3758-2/
2016-12-13
Published