Buffer overflow in Libgd
CVE-2016-8670
Integer signedness error in the dynamicGetbuf function in gd_io_dp.c in the GD Graphics Library (aka libgd) through 2.2.3, as used in PHP before 5.6.28 and 7.x before 7.0.13, allows remote attackers to cause a denial of service (stack-based buffer overflow) or possibly have unspecified other impact via a crafted imagecreatefromstring call.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.048 (91.6th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 92nd percentile — 91.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.048 · newest: 0.048 · change: 0.000
Affected products
Weakness classification (CWE)
References
- www.php.net/ChangeLog-7.php (Release Notes, Vendor Advisory)
- www.securityfocus.com/bid/93594 (vdb-entry)
- github.com/libgd/libgd/commit/53110871935244816bbb9d131da0bccff734bfe9 (Vendor Advisory)
- www.openwall.com/lists/oss-security/2016/10/15/1 (mailing-list, Third Party Advisory)
- www.debian.org/security/2016/dsa-3693 (vendor-advisory)
- bugs.php.net/bug.php (Vendor Advisory)
- www.php.net/ChangeLog-5.php (Release Notes, Vendor Advisory)
- support.f5.com/csp/article/K21336065
Frequently asked questions
- What is CVE-2016-8670?
- CVE-2016-8670 is a critical-severity vulnerability in Libgd, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 9.8/10. Published 2017-01-04.
- How severe is CVE-2016-8670?
- Critical severity. CVSS v3 base score is 9.8 out of 10.