Squid 2.5.STABLE7 and earlier allows remote attackers to cause a denial of service…
Priority LOW 37Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · Partial
- Fix status
- Fixed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA and Red Hat.
Summary
Squid 2.5.STABLE7 and earlier allows remote attackers to cause a denial of service (segmentation fault) by aborting the connection during a (1) PUT or (2) POST request, which causes Squid to access previously freed memory.
Why it matters now
EPSS 0.12534 96th percentileScored 2026-11-07
Fix Fixed Red Hat: 2 advisories
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 58
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:squid:squid:2.0.patch1:*:*:*:*:*:*:* | 2.0.patch1 | Vulnerable | Squid |
| cpe:2.3:a:squid:squid:2.0.patch2:*:*:*:*:*:*:* | 2.0.patch2 | Vulnerable | Squid |
| cpe:2.3:a:squid:squid:2.0.pre1:*:*:*:*:*:*:* | 2.0.pre1 | Vulnerable | Squid |
| cpe:2.3:a:squid:squid:2.0.release:*:*:*:*:*:*:* | 2.0.release | Vulnerable | Squid |
| cpe:2.3:a:squid:squid:2.0_patch2:*:*:*:*:*:*:* | 2.0_patch2 | Vulnerable | Squid |
| cpe:2.3:a:squid:squid:2.1.patch1:*:*:*:*:*:*:* | 2.1.patch1 | Vulnerable | Squid |
| cpe:2.3:a:squid:squid:2.1.patch2:*:*:*:*:*:*:* | 2.1.patch2 | Vulnerable | Squid |
| cpe:2.3:a:squid:squid:2.1.pre1:*:*:*:*:*:*:* | 2.1.pre1 | Vulnerable | Squid |
| cpe:2.3:a:squid:squid:2.1.pre3:*:*:*:*:*:*:* | 2.1.pre3 | Vulnerable | Squid |
| cpe:2.3:a:squid:squid:2.1.pre4:*:*:*:*:*:*:* | 2.1.pre4 | Vulnerable | Squid |
- cpe:2.3:a:squid:squid:2.0.patch1:*:*:*:*:*:*:* Versions 2.0.patch1 Vulnerable ·Squid
- cpe:2.3:a:squid:squid:2.0.patch2:*:*:*:*:*:*:* Versions 2.0.patch2 Vulnerable ·Squid
- cpe:2.3:a:squid:squid:2.0.pre1:*:*:*:*:*:*:* Versions 2.0.pre1 Vulnerable ·Squid
- cpe:2.3:a:squid:squid:2.0.release:*:*:*:*:*:*:* Versions 2.0.release Vulnerable ·Squid
- cpe:2.3:a:squid:squid:2.0_patch2:*:*:*:*:*:*:* Versions 2.0_patch2 Vulnerable ·Squid
- cpe:2.3:a:squid:squid:2.1.patch1:*:*:*:*:*:*:* Versions 2.1.patch1 Vulnerable ·Squid
- cpe:2.3:a:squid:squid:2.1.patch2:*:*:*:*:*:*:* Versions 2.1.patch2 Vulnerable ·Squid
- cpe:2.3:a:squid:squid:2.1.pre1:*:*:*:*:*:*:* Versions 2.1.pre1 Vulnerable ·Squid
- cpe:2.3:a:squid:squid:2.1.pre3:*:*:*:*:*:*:* Versions 2.1.pre3 Vulnerable ·Squid
- cpe:2.3:a:squid:squid:2.1.pre4:*:*:*:*:*:*:* Versions 2.1.pre4 Vulnerable ·Squid
Show 48 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:squid:squid:2.1.release:*:*:*:*:*:*:* | 2.1.release | Vulnerable | Squid |
| cpe:2.3:a:squid:squid:2.1_patch2:*:*:*:*:*:*:* | 2.1_patch2 | Vulnerable | Squid |
| cpe:2.3:a:squid:squid:2.2.devel3:*:*:*:*:*:*:* | 2.2.devel3 | Vulnerable | Squid |
| cpe:2.3:a:squid:squid:2.2.devel4:*:*:*:*:*:*:* | 2.2.devel4 | Vulnerable | Squid |
| cpe:2.3:a:squid:squid:2.2.pre1:*:*:*:*:*:*:* | 2.2.pre1 | Vulnerable | Squid |
| cpe:2.3:a:squid:squid:2.2.pre2:*:*:*:*:*:*:* | 2.2.pre2 | Vulnerable | Squid |
| cpe:2.3:a:squid:squid:2.2.stable1:*:*:*:*:*:*:* | 2.2.stable1 | Vulnerable | Squid |
| cpe:2.3:a:squid:squid:2.2.stable2:*:*:*:*:*:*:* | 2.2.stable2 | Vulnerable | Squid |
| cpe:2.3:a:squid:squid:2.2.stable3:*:*:*:*:*:*:* | 2.2.stable3 | Vulnerable | Squid |
| cpe:2.3:a:squid:squid:2.2.stable4:*:*:*:*:*:*:* | 2.2.stable4 | Vulnerable | Squid |
| cpe:2.3:a:squid:squid:2.2.stable5:*:*:*:*:*:*:* | 2.2.stable5 | Vulnerable | Squid |
| cpe:2.3:a:squid:squid:2.3.devel2:*:*:*:*:*:*:* | 2.3.devel2 | Vulnerable | Squid |
| cpe:2.3:a:squid:squid:2.3.devel3:*:*:*:*:*:*:* | 2.3.devel3 | Vulnerable | Squid |
| cpe:2.3:a:squid:squid:2.3.stable1:*:*:*:*:*:*:* | 2.3.stable1 | Vulnerable | Squid |
| cpe:2.3:a:squid:squid:2.3.stable2:*:*:*:*:*:*:* | 2.3.stable2 | Vulnerable | Squid |
| cpe:2.3:a:squid:squid:2.3.stable3:*:*:*:*:*:*:* | 2.3.stable3 | Vulnerable | Squid |
| cpe:2.3:a:squid:squid:2.3.stable4:*:*:*:*:*:*:* | 2.3.stable4 | Vulnerable | Squid |
| cpe:2.3:a:squid:squid:2.3.stable5:*:*:*:*:*:*:* | 2.3.stable5 | Vulnerable | Squid |
| cpe:2.3:a:squid:squid:2.3_.stable4:*:*:*:*:*:*:* | 2.3_.stable4 | Vulnerable | Squid |
| cpe:2.3:a:squid:squid:2.3_.stable5:*:*:*:*:*:*:* | 2.3_.stable5 | Vulnerable | Squid |
| cpe:2.3:a:squid:squid:2.3_stable5:*:*:*:*:*:*:* | 2.3_stable5 | Vulnerable | Squid |
| cpe:2.3:a:squid:squid:2.4:*:*:*:*:*:*:* | 2.4 | Vulnerable | Squid |
| cpe:2.3:a:squid:squid:2.4.stable1:*:*:*:*:*:*:* | 2.4.stable1 | Vulnerable | Squid |
| cpe:2.3:a:squid:squid:2.4.stable2:*:*:*:*:*:*:* | 2.4.stable2 | Vulnerable | Squid |
| cpe:2.3:a:squid:squid:2.4.stable3:*:*:*:*:*:*:* | 2.4.stable3 | Vulnerable | Squid |
| cpe:2.3:a:squid:squid:2.4.stable4:*:*:*:*:*:*:* | 2.4.stable4 | Vulnerable | Squid |
| cpe:2.3:a:squid:squid:2.4.stable6:*:*:*:*:*:*:* | 2.4.stable6 | Vulnerable | Squid |
| cpe:2.3:a:squid:squid:2.4.stable7:*:*:*:*:*:*:* | 2.4.stable7 | Vulnerable | Squid |
| cpe:2.3:a:squid:squid:2.4_.stable2:*:*:*:*:*:*:* | 2.4_.stable2 | Vulnerable | Squid |
| cpe:2.3:a:squid:squid:2.4_.stable6:*:*:*:*:*:*:* | 2.4_.stable6 | Vulnerable | Squid |
| cpe:2.3:a:squid:squid:2.4_.stable7:*:*:*:*:*:*:* | 2.4_.stable7 | Vulnerable | Squid |
| cpe:2.3:a:squid:squid:2.4_stable7:*:*:*:*:*:*:* | 2.4_stable7 | Vulnerable | Squid |
| cpe:2.3:a:squid:squid:2.5.6:*:*:*:*:*:*:* | 2.5.6 | Vulnerable | Squid |
| cpe:2.3:a:squid:squid:2.5.stable1:*:*:*:*:*:*:* | 2.5.stable1 | Vulnerable | Squid |
| cpe:2.3:a:squid:squid:2.5.stable2:*:*:*:*:*:*:* | 2.5.stable2 | Vulnerable | Squid |
| cpe:2.3:a:squid:squid:2.5.stable3:*:*:*:*:*:*:* | 2.5.stable3 | Vulnerable | Squid |
| cpe:2.3:a:squid:squid:2.5.stable4:*:*:*:*:*:*:* | 2.5.stable4 | Vulnerable | Squid |
| cpe:2.3:a:squid:squid:2.5.stable5:*:*:*:*:*:*:* | 2.5.stable5 | Vulnerable | Squid |
| cpe:2.3:a:squid:squid:2.5.stable6:*:*:*:*:*:*:* | 2.5.stable6 | Vulnerable | Squid |
| cpe:2.3:a:squid:squid:2.5.stable7:*:*:*:*:*:*:* | 2.5.stable7 | Vulnerable | Squid |
| cpe:2.3:a:squid:squid:2.5_.stable1:*:*:*:*:*:*:* | 2.5_.stable1 | Vulnerable | Squid |
| cpe:2.3:a:squid:squid:2.5_.stable3:*:*:*:*:*:*:* | 2.5_.stable3 | Vulnerable | Squid |
| cpe:2.3:a:squid:squid:2.5_.stable4:*:*:*:*:*:*:* | 2.5_.stable4 | Vulnerable | Squid |
| cpe:2.3:a:squid:squid:2.5_.stable5:*:*:*:*:*:*:* | 2.5_.stable5 | Vulnerable | Squid |
| cpe:2.3:a:squid:squid:2.5_.stable6:*:*:*:*:*:*:* | 2.5_.stable6 | Vulnerable | Squid |
| cpe:2.3:a:squid:squid:2.5_stable3:*:*:*:*:*:*:* | 2.5_stable3 | Vulnerable | Squid |
| cpe:2.3:a:squid:squid:2.5_stable4:*:*:*:*:*:*:* | 2.5_stable4 | Vulnerable | Squid |
| cpe:2.3:a:squid:squid:2.5_stable9:*:*:*:*:*:*:* | 2.5_stable9 | Vulnerable | Squid |
- cpe:2.3:a:squid:squid:2.1.release:*:*:*:*:*:*:* Versions 2.1.release Vulnerable ·Squid
- cpe:2.3:a:squid:squid:2.1_patch2:*:*:*:*:*:*:* Versions 2.1_patch2 Vulnerable ·Squid
- cpe:2.3:a:squid:squid:2.2.devel3:*:*:*:*:*:*:* Versions 2.2.devel3 Vulnerable ·Squid
- cpe:2.3:a:squid:squid:2.2.devel4:*:*:*:*:*:*:* Versions 2.2.devel4 Vulnerable ·Squid
- cpe:2.3:a:squid:squid:2.2.pre1:*:*:*:*:*:*:* Versions 2.2.pre1 Vulnerable ·Squid
- cpe:2.3:a:squid:squid:2.2.pre2:*:*:*:*:*:*:* Versions 2.2.pre2 Vulnerable ·Squid
- cpe:2.3:a:squid:squid:2.2.stable1:*:*:*:*:*:*:* Versions 2.2.stable1 Vulnerable ·Squid
- cpe:2.3:a:squid:squid:2.2.stable2:*:*:*:*:*:*:* Versions 2.2.stable2 Vulnerable ·Squid
- cpe:2.3:a:squid:squid:2.2.stable3:*:*:*:*:*:*:* Versions 2.2.stable3 Vulnerable ·Squid
- cpe:2.3:a:squid:squid:2.2.stable4:*:*:*:*:*:*:* Versions 2.2.stable4 Vulnerable ·Squid
- cpe:2.3:a:squid:squid:2.2.stable5:*:*:*:*:*:*:* Versions 2.2.stable5 Vulnerable ·Squid
- cpe:2.3:a:squid:squid:2.3.devel2:*:*:*:*:*:*:* Versions 2.3.devel2 Vulnerable ·Squid
- cpe:2.3:a:squid:squid:2.3.devel3:*:*:*:*:*:*:* Versions 2.3.devel3 Vulnerable ·Squid
- cpe:2.3:a:squid:squid:2.3.stable1:*:*:*:*:*:*:* Versions 2.3.stable1 Vulnerable ·Squid
- cpe:2.3:a:squid:squid:2.3.stable2:*:*:*:*:*:*:* Versions 2.3.stable2 Vulnerable ·Squid
- cpe:2.3:a:squid:squid:2.3.stable3:*:*:*:*:*:*:* Versions 2.3.stable3 Vulnerable ·Squid
- cpe:2.3:a:squid:squid:2.3.stable4:*:*:*:*:*:*:* Versions 2.3.stable4 Vulnerable ·Squid
- cpe:2.3:a:squid:squid:2.3.stable5:*:*:*:*:*:*:* Versions 2.3.stable5 Vulnerable ·Squid
- cpe:2.3:a:squid:squid:2.3_.stable4:*:*:*:*:*:*:* Versions 2.3_.stable4 Vulnerable ·Squid
- cpe:2.3:a:squid:squid:2.3_.stable5:*:*:*:*:*:*:* Versions 2.3_.stable5 Vulnerable ·Squid
- cpe:2.3:a:squid:squid:2.3_stable5:*:*:*:*:*:*:* Versions 2.3_stable5 Vulnerable ·Squid
- cpe:2.3:a:squid:squid:2.4:*:*:*:*:*:*:* Versions 2.4 Vulnerable ·Squid
- cpe:2.3:a:squid:squid:2.4.stable1:*:*:*:*:*:*:* Versions 2.4.stable1 Vulnerable ·Squid
- cpe:2.3:a:squid:squid:2.4.stable2:*:*:*:*:*:*:* Versions 2.4.stable2 Vulnerable ·Squid
- cpe:2.3:a:squid:squid:2.4.stable3:*:*:*:*:*:*:* Versions 2.4.stable3 Vulnerable ·Squid
- cpe:2.3:a:squid:squid:2.4.stable4:*:*:*:*:*:*:* Versions 2.4.stable4 Vulnerable ·Squid
- cpe:2.3:a:squid:squid:2.4.stable6:*:*:*:*:*:*:* Versions 2.4.stable6 Vulnerable ·Squid
- cpe:2.3:a:squid:squid:2.4.stable7:*:*:*:*:*:*:* Versions 2.4.stable7 Vulnerable ·Squid
- cpe:2.3:a:squid:squid:2.4_.stable2:*:*:*:*:*:*:* Versions 2.4_.stable2 Vulnerable ·Squid
- cpe:2.3:a:squid:squid:2.4_.stable6:*:*:*:*:*:*:* Versions 2.4_.stable6 Vulnerable ·Squid
- cpe:2.3:a:squid:squid:2.4_.stable7:*:*:*:*:*:*:* Versions 2.4_.stable7 Vulnerable ·Squid
- cpe:2.3:a:squid:squid:2.4_stable7:*:*:*:*:*:*:* Versions 2.4_stable7 Vulnerable ·Squid
- cpe:2.3:a:squid:squid:2.5.6:*:*:*:*:*:*:* Versions 2.5.6 Vulnerable ·Squid
- cpe:2.3:a:squid:squid:2.5.stable1:*:*:*:*:*:*:* Versions 2.5.stable1 Vulnerable ·Squid
- cpe:2.3:a:squid:squid:2.5.stable2:*:*:*:*:*:*:* Versions 2.5.stable2 Vulnerable ·Squid
- cpe:2.3:a:squid:squid:2.5.stable3:*:*:*:*:*:*:* Versions 2.5.stable3 Vulnerable ·Squid
- cpe:2.3:a:squid:squid:2.5.stable4:*:*:*:*:*:*:* Versions 2.5.stable4 Vulnerable ·Squid
- cpe:2.3:a:squid:squid:2.5.stable5:*:*:*:*:*:*:* Versions 2.5.stable5 Vulnerable ·Squid
- cpe:2.3:a:squid:squid:2.5.stable6:*:*:*:*:*:*:* Versions 2.5.stable6 Vulnerable ·Squid
- cpe:2.3:a:squid:squid:2.5.stable7:*:*:*:*:*:*:* Versions 2.5.stable7 Vulnerable ·Squid
- cpe:2.3:a:squid:squid:2.5_.stable1:*:*:*:*:*:*:* Versions 2.5_.stable1 Vulnerable ·Squid
- cpe:2.3:a:squid:squid:2.5_.stable3:*:*:*:*:*:*:* Versions 2.5_.stable3 Vulnerable ·Squid
- cpe:2.3:a:squid:squid:2.5_.stable4:*:*:*:*:*:*:* Versions 2.5_.stable4 Vulnerable ·Squid
- cpe:2.3:a:squid:squid:2.5_.stable5:*:*:*:*:*:*:* Versions 2.5_.stable5 Vulnerable ·Squid
- cpe:2.3:a:squid:squid:2.5_.stable6:*:*:*:*:*:*:* Versions 2.5_.stable6 Vulnerable ·Squid
- cpe:2.3:a:squid:squid:2.5_stable3:*:*:*:*:*:*:* Versions 2.5_stable3 Vulnerable ·Squid
- cpe:2.3:a:squid:squid:2.5_stable4:*:*:*:*:*:*:* Versions 2.5_stable4 Vulnerable ·Squid
- cpe:2.3:a:squid:squid:2.5_stable9:*:*:*:*:*:*:* Versions 2.5_stable9 Vulnerable ·Squid
Remediation
Red Hat 2 advisories
- RHSA-2005:415 Released 2005-06-14 · Red Hat rating Lowsquid security update
- Red Hat Desktop version 3 squid-7:2.5.STABLE3-6.3E.13, squid-7:2.5.STABLE3-6.3E.13.i386
- Red Hat Enterprise Linux AS version 3 squid-7:2.5.STABLE3-6.3E.13, squid-7:2.5.STABLE3-6.3E.13.i386, squid-7:2.5.STABLE3-6.3E.13.ia64 +1
- Red Hat Enterprise Linux AS version 4 squid-7:2.5.STABLE6-3.4E.9, squid-7:2.5.STABLE6-3.4E.9.i386, squid-7:2.5.STABLE6-3.4E.9.ia64 +1
- Red Hat Enterprise Linux Desktop version 4 squid-7:2.5.STABLE6-3.4E.9, squid-7:2.5.STABLE6-3.4E.9.i386
- Red Hat Enterprise Linux ES version 3 squid-7:2.5.STABLE3-6.3E.13, squid-7:2.5.STABLE3-6.3E.13.i386, squid-7:2.5.STABLE3-6.3E.13.ia64
- Red Hat Enterprise Linux ES version 4 squid-7:2.5.STABLE6-3.4E.9, squid-7:2.5.STABLE6-3.4E.9.i386, squid-7:2.5.STABLE6-3.4E.9.ia64
- Red Hat Enterprise Linux WS version 3 squid-7:2.5.STABLE3-6.3E.13, squid-7:2.5.STABLE3-6.3E.13.i386, squid-7:2.5.STABLE3-6.3E.13.ia64
- Red Hat Enterprise Linux WS version 4 squid-7:2.5.STABLE6-3.4E.9, squid-7:2.5.STABLE6-3.4E.9.i386, squid-7:2.5.STABLE6-3.4E.9.ia64
- RHSA-2005:489 Released 2005-06-13 · Red Hat rating Lowsquid security update
- Red Hat Enterprise Linux AS (Advanced Server) version 2.1
- Red Hat Enterprise Linux ES version 2.1
- Red Hat Linux Advanced Workstation 2.1
Vendor assessments
Red Hat
Red Hat rating: Low. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Desktop version 3 | Fixed | RHSA-2005:415 |
| Red Hat Enterprise Linux AS (Advanced Server) version 2.1 | Fixed | RHSA-2005:489 |
| Red Hat Enterprise Linux AS version 3 | Fixed | RHSA-2005:415 |
| Red Hat Enterprise Linux AS version 4 | Fixed | RHSA-2005:415 |
| Red Hat Enterprise Linux Desktop version 4 | Fixed | RHSA-2005:415 |
| Red Hat Enterprise Linux ES version 2.1 | Fixed | RHSA-2005:489 |
| Red Hat Enterprise Linux ES version 3 | Fixed | RHSA-2005:415 |
| Red Hat Enterprise Linux ES version 4 | Fixed | RHSA-2005:415 |
| Red Hat Enterprise Linux WS version 3 | Fixed | RHSA-2005:415 |
| Red Hat Enterprise Linux WS version 4 | Fixed | RHSA-2005:415 |
| Red Hat Linux Advanced Workstation 2.1 | Fixed | RHSA-2005:489 |
Timeline
- 2026-10-02 Threatist record created from CVE-2005-0718
- 2026-10-03 Alias added: GHSA-9wrw-hg5g-h4gx
References
More Squid vulnerabilities
- TI-2009-00458 Squid 2.7 to 2.7.STABLE5, 3.0 to 3.0.STABLE12, and 3.1 to 3.1.0.4 allows remote attackers… CVSS 2.0MEDIUM 5.0
- TI-2005-00207 The httpProcessReplyHeader function in http.c for Squid 2.5-STABLE7 and earlier does not… CVSS 2.0MEDIUM 5.0
- TI-2005-00080 The WCCP message parsing code in Squid 2.5.STABLE7 and earlier allows remote attackers to… CVSS 2.0MEDIUM 5.0
- TI-2005-00142 squid_ldap_auth in Squid 2.5 and earlier allows remote authenticated users to bypass… CVSS 2.0HIGH 7.5
- TI-2005-00143 Squid 2.5 up to 2.5.STABLE7 allows remote attackers to poison the cache or conduct… CVSS 2.0MEDIUM 5.0
- TI-2005-00404 Squid 2.5.STABLE8 and earlier allows remote attackers to cause a denial of service… CVSS 2.0MEDIUM 5.0
Sources
- CVE-2005-0718 · CVE Program
- CVE-2005-0718 · NVD
- FIRST EPSS
- GHSA-9wrw-hg5g-h4gx · GitHub Advisory Database · CC BY 4.0
- CVE-2005-0718 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences