CVE-2013-7439

Severity: high (CVSS 7.5 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 4.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2015-04-16 · updated 2026-06-17
Weakness: CWE-189

Description

Multiple off-by-one errors in the (1) MakeBigReq and (2) SetReqLen macros in include/X11/Xlibint.h in X11R6.x and libX11 before 1.6.0 allow remote attackers to have unspecified impact via a crafted request, which triggers a buffer overflow.

Affected products

Canonical Ubuntu Linux: 12.04, 14.04, 14.10
Debian Linux: 7.0
x.org libX11: 1.0.1, 1.0.2, 1.0.3, 1.1, 1.1-rc1, 1.1-rc2 (+28)
X.Org X11: 6.0, 6.1, 6.3, 6.4, 6.5.1, 6.6 (+5)

References

http://lists.x.org/archives/xorg-announce/2015-April/002561.html
http://seclists.org/oss-sec/2015/q2/81
http://www.debian.org/security/2015/dsa-3224
http://www.oracle.com/technetwork/topics/security/bulletinjul2015-2511963.html
http://www.securityfocus.com/bid/73962
http://www.ubuntu.com/usn/USN-2568-1
https://bugs.freedesktop.org/show_bug.cgi?id=56508
http://lists.x.org/archives/xorg-announce/2015-April/002561.html
http://seclists.org/oss-sec/2015/q2/81
http://www.debian.org/security/2015/dsa-3224
http://www.oracle.com/technetwork/topics/security/bulletinjul2015-2511963.html
http://www.securityfocus.com/bid/73962

Get alerted when CVE-2013-7439 or the next vulnerability affects your stack