Description
The Q.931 dissector in Ethereal before 0.10.0, and Tethereal, allows remote attackers to cause a denial of service (crash) via a malformed Q.931, which triggers a null dereference.
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 3.0 | ethereal | 0.9.4-1woody6 | DSA-407 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 3 | ethereal +1 | 0.10.0a-0.30E.1 | RHSA-2004:002 |
Advisories 2
- RHSA-2004:002 Red Hat Security Advisory: ethereal security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- DSA-407 ethereal - buffer overflows Debian Security (DSA / DLA) · Mar 9, 2026
References
- http://www.ethereal.com/appnotes/enpa-sa-00012.html
- oval:org.mitre.oval:def:857 vdb-entry signature
- MDKSA-2004:002 vendor-advisory
- RHSA-2004:001 vendor-advisory
- 10568 third-party-advisory
- RHSA-2004:002 vendor-advisory
- 10531 third-party-advisory
- DSA-407 vendor-advisory
- oval:org.mitre.oval:def:10097 vdb-entry signature
- 10570 third-party-advisory
- CLA-2004:801 vendor-advisory