Description
stunnel 4.0.3 and earlier allows attackers to cause a denial of service (crash) via SIGCHLD signal handler race conditions that cause an inconsistency in the child counter.
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 14 | stunnel | 2:3.24-1 | — |
| Debian 13 | stunnel4 | 4.04-1 | — |
| Debian 12 | stunnel4 | 4.04-1 | — |
References
- ESA-20030806-020 vendor-advisory
- CLA-2003:736 vendor-advisory
- 20030112 SIGCHLD problem in Stunnel mailing-list
- RHSA-2003:223 vendor-advisory
- http://marc.info/?l=stunnel-users&m=103600188215117&w=2
- 6592 vdb-entry
- 2003-0030 vendor-advisory
- RHSA-2003:221 vendor-advisory