Buffer overflow in Xmlsoft Libxml2
CVE-2015-7941
libxml2 2.9.2 does not properly stop parsing invalid input, which allows context-dependent attackers to cause a denial of service (out-of-bounds read and libxml2 crash) via crafted XML data to the (1) xmlParseEntityDecl or (2) xmlParseConditionalSections function in parser.c, as demonstrated by non-terminated entities.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v2 metric
CVSS v2 base score 4.3 (Medium). Vector: AV:N/AC:M/Au:N/C:N/I:N/A:P. This CVE predates CVSS v3 and has no v3 score from NVD.
EPSS exploit prediction
EPSS: 0.031 (87.1th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 87th percentile — 87.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.031 · newest: 0.031 · change: 0.000
Affected products
- Xmlsoft Libxml2 — versions 2.9.2
- Canonical Ubuntu Linux — versions 12.04, 14.04, 15.04
Weakness classification (CWE)
Public proof-of-concept exploits
References
- rhn.redhat.com/errata/RHSA-2015-2550.html (vendor-advisory)
- www.securityfocus.com/bid/74241 (vdb-entry)
- lists.opensuse.org/opensuse-updates/2016-01/msg00031.html (vendor-advisory)
- www.openwall.com/lists/oss-security/2015/10/22/5 (mailing-list)
- git.gnome.org/browse/libxml2/commit/
- www.debian.org/security/2015/dsa-3430 (vendor-advisory)
- xmlsoft.org/news.html
- lists.fedoraproject.org/pipermail/package-announce/2016-February/177381.html (vendor-advisory)
- bugzilla.gnome.org/show_bug.cgi
- rhn.redhat.com/errata/RHSA-2016-1089.html (vendor-advisory)
Frequently asked questions
- What is CVE-2015-7941?
- CVE-2015-7941 is a vulnerability in Xmlsoft Libxml2, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. Published 2015-11-18.
- Is CVE-2015-7941 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.