Description
ImageMagick before 7.1.2-26 contains a policy bypass vulnerability in the APNG encoder and external delegates due to missing validation checks. Attackers can write files to disallowed paths by bypassing configured policy restrictions through the APNG encoding process.
Problem types
Improper Link Resolution Before File Access ('Link Following')
Product status
Any version before 7.1.2-26
7.1.2-26 (semver)
Any version before 6.9.13-51
6.9.13-51 (semver)
Credits
rexpository
References
github.com/...Magick/security/advisories/GHSA-v3j6-27vc-7pw2 (GitHub Security Advisory (GHSA-v3j6-27vc-7pw2))
www.vulncheck.com/...efore-26-policy-bypass-via-apng-encoder (VulnCheck Advisory: ImageMagick before 7.1.2-26 Policy Bypass via APNG encoder)