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.

References

• https://nvd.nist.gov/vuln/detail/CVE-2015-1781
• 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;a=commit;h=2959eda9272a03386
• https://www.sourceware.org/ml/libc-alpha/2015-08/msg00609.html
• 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://access.redhat.com/errata/RHSA-2015:0863
• https://access.redhat.com/errata/RHSA-2015:2199
• https://access.redhat.com/errata/RHSA-2015:2589
• https://access.redhat.com/security/cve/CVE-2015-1781
• https://bugzilla.redhat.com/show_bug.cgi?id=1199525
• https://sourceware.org/git/?p=glibc.git%3Ba=commit%3Bh=2959eda9272a03386