Description
squid_redirect script in adzapper before 2006-01-29 allows remote attackers to cause a denial of service (CPU consumption) via a URL with a large number of trailing / (forward slashes), which might produce inefficient regular expressions.
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 3.1 | adzapper | 20050316-1sarge1 | DSA-966-1 |
Advisories 1
- DSA-966-1 adzapper - denial of service Debian Security (DSA / DLA) · Mar 9, 2026
References
- ADV-2006-0491 vdb-entry
- 18771 third-party-advisory
- http://adzapper.sourceforge.net/cvslog.html
- 18777 third-party-advisory
- 16558 vdb-entry
- DSA-966 vendor-advisory
- adzapper-squid-redirect-dos(24640) vdb-entry
- http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=350308
- http://bugs.debian.org/cgi-bin/bugreport.cgi/squid_redirect.diff?bug=350308%3Bmsg=5%3Batt=1
- 22900 vdb-entry