Buffer overflow in GNU Glibc
CVE-2015-1781
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v2 metric
CVSS v2 base score 6.8 (Medium). Vector: AV:N/AC:M/Au:N/C:P/I:P/A:P. This CVE predates CVSS v3 and has no v3 score from NVD.
EPSS exploit prediction
EPSS: 0.050 (92.0th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 92nd percentile — 92.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.050 · newest: 0.050 · change: 0.000
Affected products
- GNU Glibc
- Canonical Ubuntu Linux — versions 12.04, 14.04, 15.04
- Debian Linux — versions 7.0
- SUSE Linux Enterprise Debuginfo — versions 11
- SUSE Linux Enterprise Desktop — versions 11
- SUSE Linux Enterprise Server — versions 11
Weakness classification (CWE)
Public proof-of-concept exploits
References
- lists.opensuse.org/opensuse-security-announce/2015-08/msg00019.html (vendor-advisory, Mailing List, Third Party Advisory)
- www.sourceware.org/ml/libc-alpha/2015-08/msg00609.html (mailing-list, Mailing List, Third Party Advisory)
- lists.opensuse.org/opensuse-security-announce/2016-02/msg00036.html (vendor-advisory, Mailing List, Third Party Advisory)
- www.ubuntu.com/usn/USN-2985-2 (vendor-advisory, Third Party Advisory)
- security.gentoo.org/glsa/201602-02 (vendor-advisory, Third Party Advisory)
- www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html (Third Party Advisory)
- sourceware.org/git/
- lists.fedoraproject.org/pipermail/package-announce/2016-February/177404.html (vendor-advisory, Mailing List, Third Party Advisory)
- rhn.redhat.com/errata/RHSA-2015-0863.html (vendor-advisory, Third Party Advisory)
- www.debian.org/security/2016/dsa-3480 (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2015-1781?
- CVE-2015-1781 is a vulnerability in GNU Glibc, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. Published 2015-09-28.
- Is CVE-2015-1781 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.