Description
Cloudflare version of zlib library was found to be vulnerable to memory corruption issues affecting the deflation algorithm implementation (deflate.c). The issues resulted from improper input validation and heap-based buffer overflow.
A local attacker could exploit the problem during compression using a crafted malicious file potentially leading to denial of service of the software.
Patches: The issue has been patched in commit 8352d10 https://github.com/cloudflare/zlib/commit/8352d108c05db1bdc5ac3bdf834dad641694c13c . The upstream repository is not affected.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Cloudflare | zlib | — | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | fltk | 1.3.8-1 | — |
| Azure Linux 3 | ogdi +2 | No fix yet | — |
| Azure Linux 3 | teckit | 2.5.12-4 | — |
| Azure Linux 2 (CBL-Mariner) | fltk +4 | No fix yet | — |