security flaw
Published Sep 1, 2004
7.5
HIGHCVSS 2.0
EPSS 13.81%
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.
Affected products
No data.
No data.
Red Hat Enterprise Linux 3
squid-7:2.5.STABLE3-5.3E
Fixed · RHSA-2004:133
Red Hat Linux 9
n/a
Fixed · RHSA-2004:134
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 3 | squid-7:2.5.STABLE3-5.3E | Fixed | RHSA-2004:133 |
| Red Hat Linux 9 | n/a | Fixed | RHSA-2004:134 |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
AV:N/AC:L/Au:N/C:P/I:P/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (12 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 13.81% (0.13807) | 96.41th | v5 (v2026.06.15) |
| Jun 15, 2026 | 13.81% (0.13809) | 96.03th | v5 (v2026.06.15) |
| Feb 9, 2026 | 2.49% (0.02494) | 84.98th | v4 (v2025.03.14) |
| Mar 30, 2025 | 4.42% (0.04424) | 87.98th | v4 (v2025.03.14) |
| Mar 29, 2025 | 6.33% (0.06325) | 84.51th | v4 (v2025.03.14) |
| Mar 17, 2025 | 4.42% (0.04424) | 88.28th | v4 (v2025.03.14) |
| Dec 12, 2024 | 2.71% (0.02708) | 90.86th | v3 (v2023.03.01) |
| Aug 9, 2023 | 2.71% (0.02708) | 89.12th | v3 (v2023.03.01) |
| Mar 7, 2023 | 2.98% (0.02980) | 89.33th | v3 (v2023.03.01) |
| Mar 6, 2023 | 12.57% (0.12567) | 95.52th | v2 (v2022.01.01) |
| Apr 1, 2022 | 12.57% (0.12567) | 95.18th | v2 (v2022.01.01) |
| Feb 4, 2022 | 12.57% (0.12567) | 90.03th | v2 (v2022.01.01) |
No CWE recorded.
References (19)
- ftp://ftp.sco.com/pub/updates/UnixWare/SCOSA-2005.16/SCOSA-2005.16.txt vendor-advisoryx_refsource_SCO
- ftp://patches.sgi.com/support/free/security/advisories/20040404-01-U.asc vendor-advisoryx_refsource_SGI
- http://distro.conectiva.com.br/atualizacoes/?id=a&anuncio=000838 vendor-advisoryx_refsource_CONECTIVA
- http://marc.info/?l=bugtraq&m=108084935904110&w=2 mailing-listx_refsource_BUGTRAQ
- http://security.gentoo.org/glsa/glsa-200403-11.xml vendor-advisoryx_refsource_GENTOO
- http://www.debian.org/security/2004/dsa-474 vendor-advisoryx_refsource_DEBIAN
- http://www.mandrakesoft.com/security/advisories?name=MDKSA-2004:025 vendor-advisoryx_refsource_MANDRAKE
- http://www.osvdb.org/5916 vdb-entryx_refsource_OSVDB
- http://www.redhat.com/support/errata/RHSA-2004-133.html vendor-advisoryx_refsource_REDHAT
- http://www.redhat.com/support/errata/RHSA-2004-134.html vendor-advisoryx_refsource_REDHAT
- http://www.securityfocus.com/bid/9778 vdb-entryx_refsource_BIDExploitPatchVendor Advisory
- http://www.squid-cache.org/Advisories/SQUID-2004_1.txt x_refsource_CONFIRMExploitPatchVendor Advisory
- https://access.redhat.com/security/cve/CVE-2004-0189 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1617177 Issue Tracking
- https://exchange.xforce.ibmcloud.com/vulnerabilities/15366 vdb-entryx_refsource_XF
- https://nvd.nist.gov/vuln/detail/CVE-2004-0189
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A877 vdb-entrysignaturex_refsource_OVAL
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A941 vdb-entrysignaturex_refsource_OVAL
- https://www.cve.org/CVERecord?id=CVE-2004-0189
Change history (0)
No recorded changes yet.