CVE-2015-1781

Severity: medium (CVSS 6.8 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 5.0% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2015-09-28 · updated 2026-06-17
Weakness: CWE-119

Description

Buffer overflow in the gethostbyname_r and other unspecified NSS functions in the GNU C Library (aka glibc or libc6) before 2.22 allows context-dependent attackers to cause a denial of service (crash) or execute arbitrary code via a crafted DNS response, which triggers a call with a misaligned buffer.

Affected products

Canonical Ubuntu Linux: 12.04, 14.04, 15.04
Debian Linux: 7.0
GNU C Library (glibc): through 2.21
SUSE Linux Enterprise Debuginfo: 11-sp3, 11-sp4
SUSE Linux Enterprise Server 15 SP1: 11-sp3, 11-sp4
SUSE Linux Enterprise Server: 11-sp3, 11-sp4

References

http://lists.fedoraproject.org/pipermail/package-announce/2016-February/177404.html
http://lists.opensuse.org/opensuse-security-announce/2015-08/msg00019.html
http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00036.html
http://www.debian.org/security/2016/dsa-3480
http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html
http://www.securityfocus.com/bid/74255
http://www.securitytracker.com/id/1032178
http://www.ubuntu.com/usn/USN-2985-1
http://www.ubuntu.com/usn/USN-2985-2
https://rhn.redhat.com/errata/RHSA-2015-0863.html
https://security.gentoo.org/glsa/201602-02
https://sourceware.org/bugzilla/show_bug.cgi?id=18287

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