squid: HTCP packet temporary DoS (SQUID-2010:2)
Published Feb 15, 2010
5.0
MEDIUMCVSS 2.0
EPSS 31.07%
Description
The htcpHandleTstRequest function in htcp.c in Squid 2.x before 2.6.STABLE24 and 2.7 before 2.7.STABLE8, and htcp.cc in 3.0 before 3.0.STABLE24, allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via crafted packets to the HTCP port.
Affected products
No data.
- 2.0
- 2.1
- 2.2
- 2.3
- 2.4
- 2.5
- 2.6
- 2.7
- 2.7
- 2.7
- 3.0
- 3.0.stable1
- 3.0.stable2
- 3.0.stable3
- 3.0.stable4
- 3.0.stable5
- 3.0.stable6
- 3.0.stable7
- 3.0.stable8
- 3.0.stable9
- 3.0.stable11
- 3.0.stable12
- 3.0.stable13
- 3.0.stable14
- 3.0.stable15
- 3.0.stable16
- 3.0.stable17
- 3.0.stable18
- 3.0.stable19
- 3.0.stable20
- 3.0.stable21
- 3.0.stable22
- 3.0.stable23
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
Red Hat statement
Not vulnerable. This issue did not affect the versions of squid as shipped with Red Hat Enterprise Linux 3, 4, or 5. Those versions are not compiled with the support for HTCP protocol.
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:N/I:N/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 (13 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 31.07% (0.31074) | 98.22th | v5 (v2026.06.15) |
| Jun 15, 2026 | 30.34% (0.30339) | 97.98th | v5 (v2026.06.15) |
| Jul 30, 2025 | 49.37% (0.49372) | 97.69th | v4 (v2025.03.14) |
| Mar 30, 2025 | 56.16% (0.56162) | 97.91th | v4 (v2025.03.14) |
| Mar 29, 2025 | 58.66% (0.58662) | 97.42th | v4 (v2025.03.14) |
| Mar 17, 2025 | 56.16% (0.56162) | 97.88th | v4 (v2025.03.14) |
| Jan 22, 2025 | 91.50% (0.91500) | 99.16th | v3 (v2023.03.01) |
| Dec 17, 2024 | 92.78% (0.92783) | 99.25th | v3 (v2023.03.01) |
| Apr 18, 2023 | 94.29% (0.94290) | 98.71th | v3 (v2023.03.01) |
| Mar 7, 2023 | 93.97% (0.93971) | 98.59th | v3 (v2023.03.01) |
| Mar 6, 2023 | 2.17% (0.02172) | 80.77th | v2 (v2022.01.01) |
| Apr 1, 2022 | 2.17% (0.02172) | 78.91th | v2 (v2022.01.01) |
| Feb 4, 2022 | 2.17% (0.02172) | 57.73th | v2 (v2022.01.01) |
No CWE recorded.
References (16)
- http://bugs.squid-cache.org/show_bug.cgi?id=2858 x_refsource_MISC
- http://lists.fedoraproject.org/pipermail/package-announce/2010-February/035961.html vendor-advisoryx_refsource_FEDORA
- http://lists.fedoraproject.org/pipermail/package-announce/2010-March/037159.html vendor-advisoryx_refsource_FEDORA
- http://osvdb.org/62297 vdb-entryx_refsource_OSVDB
- http://secunia.com/advisories/38812 third-party-advisoryx_refsource_SECUNIAVendor Advisory
- http://www.securityfocus.com/bid/38212 vdb-entryx_refsource_BID
- http://www.securitytracker.com/id?1023587 vdb-entryx_refsource_SECTRACK
- http://www.squid-cache.org/Advisories/SQUID-2010_2.txt x_refsource_CONFIRMVendor Advisory
- http://www.squid-cache.org/Versions/v2/2.7/changesets/12600.patch x_refsource_MISCPatch
- http://www.squid-cache.org/Versions/v3/3.0/changesets/3.0-ADV-2010_2.patch x_refsource_MISCPatch
- http://www.vupen.com/english/advisories/2010/0371 vdb-entryx_refsource_VUPENVendor Advisory
- http://www.vupen.com/english/advisories/2010/0603 vdb-entryx_refsource_VUPENVendor Advisory
- https://access.redhat.com/security/cve/CVE-2010-0639 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=565426 Issue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2010-0639
- https://www.cve.org/CVERecord?id=CVE-2010-0639
Change history (0)
No recorded changes yet.