Description
An issue was discovered in OpenAFS before 1.6.23 and 1.8.x before 1.8.2. Several data types used as RPC input variables were implemented as unbounded array types, limited only by the inherent 32-bit length field to 4 GB. An unauthenticated attacker could send, or claim to send, large input values and consume server resources waiting for those inputs, denying service to other valid connections.
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 | openafs | 1.8.2-1 | — |
| Debian 12 | openafs | 1.8.2-1 | — |
| Debian 9 | openafs | 1.6.20-2+deb9u2 | DSA-4302-1 |
| Debian 8 | openafs | 1.6.9-2+deb8u8 | DLA-1513-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | openafs | No fix yet | — |
| Ubuntu 16.04 LTS | openafs | No fix yet | — |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | openafs | 1.8.8-1.13 | openSUSE-SU-2024:11113-1 |
Advisories 3
- DSA-4302-1 openafs - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-1513-1 openafs - security update Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2024:11113-1 openafs-1.8.8-1.13 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
References
- 106375 vdb-entry
- [debian-lts-announce] 20180921 [SECURITY] [DLA 1513-1] openafs security update mailing-list
- http://openafs.org/pages/security/OPENAFS-SA-2018-003.txt
- DSA-4302 vendor-advisory