squid: incorrect X509 server certificate validation (SQUID-2015:1)
Published May 18, 2015
2.6
LOWCVSS 2.0
EPSS 11.40%
Description
Squid 3.2.x before 3.2.14, 3.3.x before 3.3.14, 3.4.x before 3.4.13, and 3.5.x before 3.5.4, when configured with client-first SSL-bump, do not properly validate the domain or hostname fields of X.509 certificates, which allows man-in-the-middle attackers to spoof SSL servers via a valid certificate.
Affected products
No data.
Configuration 2
- 3.2.0.1
- 3.2.0.2
- 3.2.0.3
- 3.2.0.4
- 3.2.0.5
- 3.2.0.6
- 3.2.0.7
- 3.2.0.8
- 3.2.0.9
- 3.2.0.10
- 3.2.0.11
- 3.2.0.12
- 3.2.0.13
- 3.2.0.14
- 3.2.0.15
- 3.2.0.16
- 3.2.0.17
- 3.2.0.18
- 3.2.0.19
- 3.2.1
- 3.2.2
- 3.2.3
- 3.2.4
- 3.2.5
- 3.2.6
- 3.2.7
- 3.2.8
- 3.2.9
- 3.2.10
- 3.2.11
- 3.2.12
- 3.2.13
- 3.3.0
- 3.3.0.1
- 3.3.0.2
- 3.3.0.3
- 3.3.1
- 3.3.2
- 3.3.3
- 3.3.4
- 3.3.5
- 3.3.6
- 3.3.7
- 3.3.8
- 3.3.9
- 3.3.10
- 3.3.11
- 3.3.12
- 3.3.13
- 3.4.0.1
- 3.4.0.2
- 3.4.0.3
- 3.4.1
- 3.4.2
- 3.4.3
- 3.4.4
- 3.4.5
- 3.4.6
- 3.4.7
- 3.4.8
- 3.4.9
- 3.4.10
- 3.4.11
- 3.4.12
- 3.5.0.1
- 3.5.0.2
- 3.5.0.3
- 3.5.0.4
- 3.5.1
- 3.5.2
Configuration 3
- 22
No data.
Red Hat Enterprise Linux 7
squid-7:3.3.8-26.el7
Fixed · RHSA-2015:2378
Red Hat Enterprise Linux 5
squid
Not affected
Red Hat Enterprise Linux 6
squid
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 7 | squid-7:3.3.8-26.el7 | Fixed | RHSA-2015:2378 |
| Red Hat Enterprise Linux 5 | squid | Not affected | n/a |
| Red Hat Enterprise Linux 6 | squid | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
This issue did not affect the versions of squid as shipped with Red Hat Enterprise Linux 5 and 6.
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:H/Au:N/C:N/I:P/A:N
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 (22 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 11.40% (0.11402) | 95.88th | v5 (v2026.06.15) |
| Jun 15, 2026 | 11.40% (0.11402) | 95.43th | v5 (v2026.06.15) |
| Dec 28, 2025 | 6.47% (0.06474) | 90.75th | v4 (v2025.03.14) |
| Dec 27, 2025 | 3.19% (0.03195) | 86.64th | v4 (v2025.03.14) |
| Dec 1, 2025 | 6.47% (0.06474) | 90.76th | v4 (v2025.03.14) |
| Oct 28, 2025 | 5.01% (0.05013) | 89.21th | v4 (v2025.03.14) |
| Oct 27, 2025 | 2.11% (0.02109) | 83.53th | v4 (v2025.03.14) |
| Oct 1, 2025 | 5.01% (0.05013) | 89.31th | v4 (v2025.03.14) |
| Jul 30, 2025 | 2.11% (0.02109) | 83.39th | v4 (v2025.03.14) |
| May 11, 2025 | 5.01% (0.05013) | 89.13th | v4 (v2025.03.14) |
| Mar 30, 2025 | 6.47% (0.06474) | 90.16th | v4 (v2025.03.14) |
| Mar 29, 2025 | 9.87% (0.09874) | 88.23th | v4 (v2025.03.14) |
| Mar 21, 2025 | 6.47% (0.06474) | 90.27th | v4 (v2025.03.14) |
| Mar 17, 2025 | 7.58% (0.07581) | 91.21th | v4 (v2025.03.14) |
| Dec 12, 2024 | 1.67% (0.01672) | 88.16th | v3 (v2023.03.01) |
| Jan 23, 2024 | 1.67% (0.01672) | 86.33th | v3 (v2023.03.01) |
| May 13, 2023 | 1.57% (0.01566) | 85.31th | v3 (v2023.03.01) |
| Mar 7, 2023 | 1.11% (0.01110) | 82.24th | 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 (15)
- http://advisories.mageia.org/MGASA-2015-0191.html x_refsource_CONFIRMThird Party Advisory
- http://lists.fedoraproject.org/pipermail/package-announce/2016-May/183598.html vendor-advisoryx_refsource_FEDORAThird Party Advisory
- http://lists.opensuse.org/opensuse-updates/2015-09/msg00016.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-2015-2378.html vendor-advisoryx_refsource_REDHAT
- http://www.mandriva.com/security/advisories?name=MDVSA-2015:230 vendor-advisoryx_refsource_MANDRIVABroken Link
- http://www.oracle.com/technetwork/topics/security/bulletinjul2015-2511963.html x_refsource_CONFIRMThird Party Advisory
- http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html x_refsource_CONFIRMThird Party Advisory
- http://www.securityfocus.com/bid/74438 vdb-entryx_refsource_BID
- http://www.securitytracker.com/id/1032221 vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
- http://www.squid-cache.org/Advisories/SQUID-2015_1.txt x_refsource_CONFIRMVendor Advisory
- https://access.redhat.com/security/cve/CVE-2015-3455 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1218118 Issue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2015-3455
- https://www.cve.org/CVERecord?id=CVE-2015-3455
Change history (0)
No recorded changes yet.