Description
The parsing engine in ClamAV before 0.90.3 and 0.91 before 0.91rc1 allows remote attackers to bypass scanning via a RAR file with a header flag value of 10, which can be processed by WinRAR.
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 | clamav | 0.90.3-1 | — |
| Debian 13 | clamav | 0.90.3-1 | — |
| Debian 12 | clamav | 0.90.3-1 | — |
| Debian 5.0 | clamav | 0.90.1-3.1lenny3 | DTSA-43-1 |
| Debian 4.0 | clamav | 0.90.1-3etch3 | DSA-1320-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 3.1 | clamav | 0.84-2.sarge.17 | DSA-1320-1 |
Advisories 2
- DSA-1320-1 clamav Debian Security (DSA / DLA) · Mar 9, 2026
- DTSA-43-1 clamav - several vulnerabilities Debian Security (DSA / DLA) · Mar 9, 2026
References
- 25796 third-party-advisory
- https://wwws.clamav.net/bugzilla/show_bug.cgi?id=511
- SUSE-SA:2007:033 vendor-advisory
- 25525 third-party-advisory
- clamav-rar-security-bypass(34823) vdb-entry
- 25523 third-party-advisory
- DSA-1320 vendor-advisory
- http://kolab.org/security/kolab-vendor-notice-15.txt
- 25688 third-party-advisory
- [Clamav-announce] 20070530 announcing ClamAV 0.90.3 mailing-list
- 45392 vdb-entry
- http://svn.clamav.net/svn/clamav-devel/trunk/ChangeLog
- GLSA-200706-05 vendor-advisory