Buffer overflow in Imagemagick
CVE-2020-25664
In WriteOnePNGImage() of the PNG coder at coders/png.c, an improper call to AcquireVirtualMemory() and memset() allows for an out-of-bounds write later when PopShortPixel() from MagickCore/quantum-private.h is called. The patch fixes the calls by adding 256 to rowbytes. An attacker who is able to supply a specially crafted image could affect availability with a low impact to data integrity. This flaw affects ImageMagick versions prior to 6.9.10-68 and 7.0.8-68.
Vulnerability class: Buffer Overflow
EPSS: 0.007 (49.8th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H.
Affected products
- Imagemagick
- Fedoraproject Fedora — versions 34
- N/a Imagemagick — versions prior to 7.0.8-68, prior to 6.9.10-68
Weakness classification (CWE)
References
- secalert@redhat.com (Exploit, Patch, Third Party Advisory, x_refsource_MISC, Issue Tracking)
- secalert@redhat.com (x_refsource_FEDORA, vendor-advisory)
Frequently asked questions
- What is CVE-2020-25664?
- CVE-2020-25664 is a medium-severity vulnerability in Imagemagick, classified under Heap-based Buffer Overflow. CVSS score: 6.1/10. Published 2020-12-08.
- How severe is CVE-2020-25664?
- Medium severity. CVSS v3 base score is 6.1 out of 10.