Integer overflow in FreeBSD
CVE-2016-5766
Integer overflow in the _gd2GetHeader function in gd_gd2.c in the GD Graphics Library (aka libgd) before 2.2.3, as used in PHP before 5.5.37, 5.6.x before 5.6.23, and 7.x before 7.0.8, allows remote attackers to cause a denial of service (heap-based buffer overflow and application crash) or possibly have unspecified other impact via crafted chunk dimensions in an image.
Vulnerability class: Integer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.075 (94.4th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 94th percentile — 94.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.075 · newest: 0.075 · change: 0.000
Affected products
- FreeBSD — versions 8.3, 8.0, 10.0
- Libgd — versions 2.2.2
- PHP — versions 5.6.0, 5.6.1, 5.6.2
- Debian Linux — versions 8.0
- Fedoraproject Fedora — versions 23, 24, 22
- Red Hat Enterprise Linux — versions 6.0, 5, 7.0
- Red Hat Openshift — versions 2.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- bugs.php.net/bug.php (Exploit, Patch, Vendor Advisory)
- libgd.github.io/release-2.2.3.html (Release Notes)
- lists.opensuse.org/opensuse-security-announce/2016-07/msg00004.html (vendor-advisory)
- lists.opensuse.org/opensuse-updates/2016-08/msg00003.html (vendor-advisory)
- rhn.redhat.com/errata/RHSA-2016-2750.html (vendor-advisory)
- rhn.redhat.com/errata/RHSA-2016-2598.html (vendor-advisory)
- php.net/ChangeLog-5.php (Release Notes)
- github.com/php/php-src/commit/7722455726bec8c53458a32851d2a87982cf0eac (Exploit, Patch)
- www.openwall.com/lists/oss-security/2016/06/23/4 (mailing-list, Release Notes)
- security.gentoo.org/glsa/201612-09 (vendor-advisory)
Frequently asked questions
- What is CVE-2016-5766?
- CVE-2016-5766 is a high-severity vulnerability in FreeBSD, classified under Integer Overflow or Wraparound. CVSS score: 8.8/10. Published 2016-08-07.
- How severe is CVE-2016-5766?
- High severity. CVSS v3 base score is 8.8 out of 10.
- Is CVE-2016-5766 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.