Description
wvWare wv through 1.2.9 contains a stack-based out-of-bounds read vulnerability in wvGetPAPX_FKP and wvGetCHPX_FKP caused by an unvalidated FKP run count. Attackers can supply a crafted .doc file with a large crun value to read kilobytes past the 512-byte stack buffer, crashing applications like AbiWord.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| wvWare | wv | ≤ 1.2.9 | — |
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.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 13 | wv | No fix yet | — |
| Debian 12 | wv | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | wv | No fix yet | — |
| Ubuntu 26.04 LTS | wv | No fix yet | — |
| Ubuntu 24.04 LTS | wv | No fix yet | — |
| Ubuntu 22.04 LTS | wv | No fix yet | — |
| Ubuntu 20.04 LTS | wv | No fix yet | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | wv | No fix yet | — |
| Ubuntu 16.04 LTS | wv | No fix yet | — |
| Ubuntu 14.04 LTS | wv | No fix yet | — |
References
- https://hackmd.io/@haindpwn/wv-fkp-crun-stsh-cstd-oob-read third-party-advisory
- https://github.com/AbiWord/wv/blob/wv-1-2-9/fkp.c#L122 technical-description
- VulnCheck Advisory: wvWare wv through 1.2.9 Stack Out-of-Bounds Read via wvGetPAPX_FKP and wvGetCHPX_FKP third-party-advisory