CVE-2004-0189 EXPLOIT
7.5
HIGH · CVSS 2.0 · EPSS 13.8% (pctl 96)
Patch early
A public exploit exists.
Description
The "%xx" URL decoding function in Squid 2.5STABLE4 and earlier allows remote attackers to bypass url_regex ACLs via a URL with a NULL ("%00") character, which causes Squid to use only a portion of the requested URL when comparing it against the access control lists.
Scoring
| CVSS | 7.5 (HIGH, v2.0) |
|---|---|
| Vector | AV:N/AC:L/Au:N/C:P/I:P/A:P |
| EPSS | 13.81% — more likely to be exploited than 96% of all CVEs |
| On CISA KEV | no |
| Public exploit | yes |
| Published | 2004-03-15 |
| Last modified | 2026-06-16 |
Affected (1)
| Vendor | Product |
|---|---|
| squid | squid |
Public exploits
| Source | Title | Date |
|---|---|---|
| exploit-db | Squid Proxy 2.4/2.5 - NULL URL Character Unauthorized Access | 2004-03-01 |
References
- ftp://ftp.sco.com/pub/updates/UnixWare/SCOSA-2005.16/SCOSA-2005.16.txt
- ftp://patches.sgi.com/support/free/security/advisories/20040404-01-U.asc
- http://distro.conectiva.com.br/atualizacoes/?id=a&anuncio=000838
- http://marc.info/?l=bugtraq&m=108084935904110&w=2
- http://security.gentoo.org/glsa/glsa-200403-11.xml
- http://www.debian.org/security/2004/dsa-474
- http://www.mandrakesoft.com/security/advisories?name=MDKSA-2004:025
- http://www.osvdb.org/5916
- http://www.redhat.com/support/errata/RHSA-2004-133.html
- http://www.redhat.com/support/errata/RHSA-2004-134.html
- http://www.securityfocus.com/bid/9778
- http://www.squid-cache.org/Advisories/SQUID-2004_1.txt
- https://exchange.xforce.ibmcloud.com/vulnerabilities/15366
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A877
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A941
- ftp://ftp.sco.com/pub/updates/UnixWare/SCOSA-2005.16/SCOSA-2005.16.txt
- ftp://patches.sgi.com/support/free/security/advisories/20040404-01-U.asc
- http://distro.conectiva.com.br/atualizacoes/?id=a&anuncio=000838
- http://marc.info/?l=bugtraq&m=108084935904110&w=2
- http://security.gentoo.org/glsa/glsa-200403-11.xml
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