In ImageMagick 7.x before 7.0.8-42 and 6.x before 6.9.10-42, there is a use after free vulnerability in the UnmapBlob function that allows an attacker to cause a denial of service by sending a crafted file.
The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.
| Link | Tags |
|---|---|
| https://github.com/ImageMagick/ImageMagick6/issues/43 | issue tracking third party advisory |
| https://github.com/ImageMagick/ImageMagick6/commit/614a257295bdcdeda347086761062ac7658b6830 | patch |
| https://github.com/ImageMagick/ImageMagick/commit/c5d012a46ae22be9444326aa37969a3f75daa3ba | patch |
| https://github.com/ImageMagick/ImageMagick/compare/7.0.8-41...7.0.8-42 | patch |
| http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00040.html | mailing list third party advisory vendor advisory |
| http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00042.html | mailing list third party advisory vendor advisory |