7.5

CVE-2004-0189: squid

CVSS: 7.5v2.0HighModified
AliasesRHSA-2004:133DEBIAN-CVE-2004-0189DSA-474
Published 01-09-2004Last modified 08-08-2024
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Vulnerability summary

CVE-2004-0189 is a high (CVSS 7.5) vulnerability in squid. EPSS estimates a 13.81% chance of exploitation in the next 30 days, higher than 96.4% of scored vulnerabilities. 3 public exploits are recorded.

Overall risk
43/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v2.0 (NVD)
EPSS score
13.81%
0%100%
Medium · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits3reference, exploit-database

Timeline

  1. 01-09-2004
    PublishedVulnerability first disclosed.
  2. 08-08-2024
    Last modifiedVulnerability information updated.

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.

CVSS metrics

1 score · 1 source · 1 version

EPSS trend

Probability

13.81%

Chance of exploitation in the next 30 days

Percentile

96%

Versus all other CVEs

30-day change

0.00 pp

From 13.81% on 20-09-2026

20-09-202620-10-2026
EPSS score
13.81%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

3 found
  • referenceUnverified

    Exploit Reference (squid-cache.org)

    Maturity: unknown

  • referenceUnverified

    Exploit Reference (securityfocus.com)

    Maturity: unknown

  • exploit-databaseremotelinuxVerified

    Squid Proxy 2.4/2.5 - NULL URL Character Unauthorized Access

    Maturity: weaponized

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Redhat2 products
  • squid< 7:2.5.STABLE3-5.3E
  • squid-debuginfo< 7:2.5.STABLE3-5.3E
Debian1 product
  • squid< 2.5.5-1 | < 2.4.6-2woody2
Squid1 product
  • squid2.0_patch2 | 2.1_patch2 | 2.3_stable5 | 2.4 | 2.4_stable7 | 2.5_stable3 | 2.5_stable4

3 vendors · 4 products

References

23 links
Show all 23 references