CVE-2005-0194

Severity: critical (CVSS 10.0 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 5.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2005-05-02 · updated 2026-06-16

Description

Squid 2.5, when processing the configuration file, parses empty Access Control Lists (ACLs), including proxy_auth ACLs without defined auth schemes, in a way that effectively removes arguments, which could allow remote attackers to bypass intended ACLs if the administrator ignores the parser warnings.

Affected products

Squid: 2.0.patch1, 2.0.patch2, 2.0.pre1, 2.0.release, 2.1.patch1, 2.1.patch2 (+32)

References

http://distro.conectiva.com.br/atualizacoes/?id=a&anuncio=000923
http://fedoranews.org/updates/FEDORA--.shtml
http://marc.info/?l=bugtraq&m=110901183320453&w=2
http://www.debian.org/security/2005/dsa-667
http://www.kb.cert.org/vuls/id/260421
http://www.squid-cache.org/Versions/v2/2.5/bugs/#squid-2.5.STABLE7-empty_acls
http://www.squid-cache.org/Versions/v2/2.5/bugs/squid-2.5.STABLE7-empty_acls.patch
http://www.squid-cache.org/bugs/show_bug.cgi?id=1166
http://distro.conectiva.com.br/atualizacoes/?id=a&anuncio=000923
http://fedoranews.org/updates/FEDORA--.shtml
http://marc.info/?l=bugtraq&m=110901183320453&w=2
http://www.debian.org/security/2005/dsa-667

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