squid: wrong error handling for malformed HTTP responses
Published Feb 27, 2016
7.5
HIGHCVSS 3.0
EPSS 10.15%
Description
http.cc in Squid 4.x before 4.0.7 relies on the HTTP status code after a response-parsing failure, which allows remote HTTP servers to cause a denial of service (assertion failure and daemon exit) via a malformed response.
Affected products
No data.
- 4.0.1
- 4.0.2
- 4.0.3
- 4.0.4
- 4.0.5
- 4.0.6
No data.
Red Hat Enterprise Linux 7
squid-7:3.5.20-2.el7
Fixed · RHSA-2016:2600
Red Hat Enterprise Linux 5
squid
Will not fix
Red Hat Enterprise Linux 6
squid
Will not fix
Red Hat Enterprise Linux 6
squid34
Will not fix
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 7 | squid-7:3.5.20-2.el7 | Fixed | RHSA-2016:2600 |
| Red Hat Enterprise Linux 5 | squid | Will not fix | n/a |
| Red Hat Enterprise Linux 6 | squid | Will not fix | n/a |
| Red Hat Enterprise Linux 6 | squid34 | Will not fix | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
Red Hat Product Security has rated this issue as having Moderate security impact. This issue is not currently planned to be addressed in future updates. For additional information, refer to the Issue Severity Classification: https://access.redhat.com/security/updates/classification/.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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 (28 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 10.15% (0.10154) | 95.52th | v5 (v2026.06.15) |
| Sep 22, 2026 | 10.15% (0.10154) | 95.44th | v5 (v2026.06.15) |
| Sep 21, 2026 | 15.10% (0.15101) | 96.64th | v5 (v2026.06.15) |
| Sep 6, 2026 | 10.15% (0.10154) | 95.34th | v5 (v2026.06.15) |
| Sep 5, 2026 | 15.10% (0.15101) | 96.56th | v5 (v2026.06.15) |
| Aug 30, 2026 | 10.15% (0.10154) | 95.31th | v5 (v2026.06.15) |
| Aug 28, 2026 | 15.10% (0.15101) | 96.54th | v5 (v2026.06.15) |
| Aug 24, 2026 | 10.15% (0.10154) | 95.29th | v5 (v2026.06.15) |
| Aug 23, 2026 | 15.10% (0.15101) | 96.53th | v5 (v2026.06.15) |
| Jun 15, 2026 | 9.97% (0.09966) | 94.98th | v5 (v2026.06.15) |
| Feb 18, 2026 | 10.20% (0.10204) | 92.97th | v4 (v2025.03.14) |
| Jul 9, 2025 | 14.82% (0.14823) | 94.19th | v4 (v2025.03.14) |
| Jun 19, 2025 | 23.51% (0.23510) | 95.68th | v4 (v2025.03.14) |
| Jun 12, 2025 | 10.94% (0.10935) | 93.04th | v4 (v2025.03.14) |
| Mar 30, 2025 | 6.03% (0.06030) | 89.77th | v4 (v2025.03.14) |
| Mar 29, 2025 | 11.67% (0.11667) | 89.41th | v4 (v2025.03.14) |
| Mar 17, 2025 | 6.03% (0.06030) | 90.02th | v4 (v2025.03.14) |
| Dec 17, 2024 | 64.55% (0.64552) | 98.04th | v3 (v2023.03.01) |
| Feb 22, 2024 | 67.46% (0.67464) | 97.85th | v3 (v2023.03.01) |
| Nov 16, 2023 | 60.76% (0.60759) | 97.47th | v3 (v2023.03.01) |
| Aug 8, 2023 | 53.39% (0.53389) | 97.13th | v3 (v2023.03.01) |
| Jul 5, 2023 | 37.98% (0.37979) | 96.68th | v3 (v2023.03.01) |
| May 29, 2023 | 14.08% (0.14080) | 94.85th | v3 (v2023.03.01) |
| Mar 7, 2023 | 4.00% (0.04004) | 90.69th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.54% (0.01537) | 74.52th | v2 (v2022.01.01) |
| Feb 23, 2023 | 1.54% (0.01537) | 74.48th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.54% (0.01537) | 72.41th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.54% (0.01537) | 51.33th | v2 (v2022.01.01) |
References (13)
- http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00010.html vendor-advisoryx_refsource_SUSE
- http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00040.html vendor-advisoryx_refsource_SUSE
- http://lists.opensuse.org/opensuse-updates/2016-08/msg00069.html vendor-advisoryx_refsource_SUSE
- http://rhn.redhat.com/errata/RHSA-2016-2600.html vendor-advisoryx_refsource_REDHAT
- http://www.openwall.com/lists/oss-security/2016/02/26/2 mailing-listx_refsource_MLIST
- http://www.securitytracker.com/id/1035101 vdb-entryx_refsource_SECTRACK
- http://www.squid-cache.org/Advisories/SQUID-2016_2.txt x_refsource_CONFIRMVendor Advisory
- http://www.squid-cache.org/Versions/v4/changesets/squid-4-14548.patch x_refsource_CONFIRMVendor Advisory
- https://access.redhat.com/security/cve/CVE-2016-2572 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1312262 Issue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2016-2572
- https://security.gentoo.org/glsa/201607-01 vendor-advisoryx_refsource_GENTOO
- https://www.cve.org/CVERecord?id=CVE-2016-2572
Change history (0)
No recorded changes yet.