CVE-2015-1781: Buffer Overflow
First published: Mon Sep 28 2015(Updated: )
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.
Credit: secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| SUSE Linux Enterprise Debuginfo | =11-sp3 | |
| SUSE Linux Enterprise Debuginfo | =11-sp4 | |
| SUSE Linux Enterprise Desktop | =11-sp3 | |
| SUSE Linux Enterprise Desktop | =11-sp4 | |
| SUSE Linux Enterprise Server | =11-sp3 | |
| SUSE Linux Enterprise Server | =11-sp3 | |
| SUSE Linux Enterprise Server | =11-sp4 | |
| GNU C Library (glibc) | <=2.21 | |
| Debian | =7.0 | |
| Ubuntu | =12.04 | |
| Ubuntu | =14.04 | |
| Ubuntu | =15.04 |
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Reference Links
- 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
- https://sourceware.org/git/?p=glibc.git%3Ba=commit%3Bh=2959eda9272a03386
- https://www.sourceware.org/ml/libc-alpha/2015-08/msg00609.html
Frequently Asked Questions
What is the severity of CVE-2015-1781?
CVE-2015-1781 has a severity rating of high due to its potential for denial of service or arbitrary code execution.
How do I fix CVE-2015-1781?
To mitigate CVE-2015-1781, upgrade to glibc version 2.22 or later on affected systems.
What systems are affected by CVE-2015-1781?
CVE-2015-1781 affects various versions of SUSE Linux, Debian 7.0, and Ubuntu releases prior to their respective patched versions.
Can CVE-2015-1781 lead to remote attacks?
Yes, attackers can exploit CVE-2015-1781 remotely via crafted DNS responses.
What kind of impact can CVE-2015-1781 have on my system?
CVE-2015-1781 can result in a denial of service or allow attackers to execute arbitrary code on the affected system.
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