Vulnerability identifier: #VU82531

Vulnerability risk: Medium

CVSSv3.1: 6.4 [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]

CVE-ID: CVE-2015-1781

CWE-ID: CWE-119

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Glibc
Universal components / Libraries / Libraries used by multiple products

Vendor:

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to buffer overflow in the gethostbyname_r and other unspecified NSS functions in the GNU C Library (aka glibc or libc6). A remote attacker can create a specially crafted file and execute arbitrary code on the target system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

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External links
http://sourceware.org/bugzilla/show_bug.cgi?id=18287
http://www.sourceware.org/ml/libc-alpha/2015-08/msg00609.html
http://lists.opensuse.org/opensuse-security-announce/2015-08/msg00019.html
http://rhn.redhat.com/errata/RHSA-2015-0863.html
http://www.securityfocus.com/bid/74255
http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00036.html
http://www.ubuntu.com/usn/USN-2985-2
http://www.ubuntu.com/usn/USN-2985-1
http://security.gentoo.org/glsa/201602-02
http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html
http://www.securitytracker.com/id/1032178
http://www.debian.org/security/2016/dsa-3480
http://lists.fedoraproject.org/pipermail/package-announce/2016-February/177404.html
http://sourceware.org/git/?p=glibc.git%3Ba=commit%3Bh=2959eda9272a03386

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.