Buffer overflow in X.org Libx11
CVE-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 out-of-bounds write operations.
Vulnerability class: Buffer Overflow
EPSS: 0.047 (89.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- X.org Libx11
- Fedoraproject Fedora — versions 25
- N/a — versions n/a
Weakness classification (CWE)
References
- 1036945 (vdb-entry, x_refsource_SECTRACK)
- USN-3758-2 (x_refsource_UBUNTU, vendor-advisory)
- security@opentext.com (x_refsource_CONFIRM)
- GLSA-201704-03 (vendor-advisory, x_refsource_GENTOO)
- [xorg-announce] 20161004 X.Org security advisory: Protocol handling issues in X Window System client libraries (mailing-list, x_refsource_MLIST)
- [oss-security] 20161004 Re: X.Org security advisory: Protocol handling issues in X Window System client libraries (mailing-list, x_refsource_MLIST)
- [oss-security] 20161004 X.Org security advisory: Protocol handling issues in X Window System client libraries (mailing-list, x_refsource_MLIST)
- 93362 (vdb-entry, x_refsource_BID)
- USN-3758-1 (x_refsource_UBUNTU, vendor-advisory)
- FEDORA-2016-0df69ab477 (x_refsource_FEDORA, vendor-advisory)
Frequently asked questions
- What is CVE-2016-7943?
- CVE-2016-7943 is a critical-severity vulnerability in X.org Libx11, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2016-12-13.
- How severe is CVE-2016-7943?
- Critical severity. CVSS v3 base score is 9.8 out of 10.