squid: buffer overrun in Squid proxy pinger
Published Apr 7, 2016
8.2
HIGHCVSS 3.0
EPSS 14.62%
Description
Heap-based buffer overflow in the Icmp6::Recv function in icmp/Icmp6.cc in the pinger utility in Squid before 3.5.16 and 4.x before 4.0.8 allows remote servers to cause a denial of service (performance degradation or transition failures) or write sensitive information to log files via an ICMPv6 packet.
Affected products
No data.
Configuration 1
- ≤ 3.5.15
- 4.0.1
- 4.0.2
- 4.0.3
- 4.0.4
- 4.0.5
- 4.0.6
- 4.0.7
Configuration 2
- 12.04
- 14.04
- 15.10
- 16.04
No data.
Red Hat Enterprise Linux 5
squid
Not affected
Red Hat Enterprise Linux 6
squid
Not affected
Red Hat Enterprise Linux 7
squid
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | squid | Not affected | n/a |
| Red Hat Enterprise Linux 6 | squid | Not affected | n/a |
| Red Hat Enterprise Linux 7 | 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, 6 and 7 as they did not include support for ICMP pinging and the 'pinger' binary.
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:L/A:H
AV:N/AC:L/Au:N/C:P/I:P/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 (30 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 14.62% (0.14620) | 96.55th | v5 (v2026.06.15) |
| Sep 22, 2026 | 14.62% (0.14620) | 96.50th | v5 (v2026.06.15) |
| Sep 21, 2026 | 30.62% (0.30621) | 98.20th | v5 (v2026.06.15) |
| Sep 6, 2026 | 14.62% (0.14620) | 96.42th | v5 (v2026.06.15) |
| Sep 5, 2026 | 30.62% (0.30621) | 98.16th | v5 (v2026.06.15) |
| Aug 30, 2026 | 14.62% (0.14620) | 96.40th | v5 (v2026.06.15) |
| Aug 28, 2026 | 30.62% (0.30621) | 98.15th | v5 (v2026.06.15) |
| Aug 24, 2026 | 14.62% (0.14620) | 96.38th | v5 (v2026.06.15) |
| Aug 23, 2026 | 30.62% (0.30621) | 98.15th | v5 (v2026.06.15) |
| Jun 15, 2026 | 14.35% (0.14353) | 96.15th | v5 (v2026.06.15) |
| Feb 18, 2026 | 75.37% (0.75366) | 98.85th | v4 (v2025.03.14) |
| Dec 28, 2025 | 78.81% (0.78810) | 99.00th | v4 (v2025.03.14) |
| Dec 27, 2025 | 53.87% (0.53872) | 97.90th | v4 (v2025.03.14) |
| Oct 28, 2025 | 78.81% (0.78810) | 99.00th | v4 (v2025.03.14) |
| Oct 27, 2025 | 53.87% (0.53872) | 97.87th | v4 (v2025.03.14) |
| Oct 1, 2025 | 78.81% (0.78810) | 99.02th | v4 (v2025.03.14) |
| Jul 30, 2025 | 53.87% (0.53872) | 97.89th | v4 (v2025.03.14) |
| Jul 13, 2025 | 78.81% (0.78810) | 98.99th | v4 (v2025.03.14) |
| Mar 30, 2025 | 76.65% (0.76647) | 98.89th | v4 (v2025.03.14) |
| Mar 29, 2025 | 80.19% (0.80191) | 98.86th | v4 (v2025.03.14) |
| Mar 17, 2025 | 76.65% (0.76647) | 98.89th | v4 (v2025.03.14) |
| Dec 12, 2024 | 1.69% (0.01687) | 88.21th | v3 (v2023.03.01) |
| Jun 5, 2024 | 1.69% (0.01687) | 87.38th | v3 (v2023.03.01) |
| May 7, 2024 | 2.37% (0.02373) | 89.77th | v3 (v2023.03.01) |
| May 31, 2023 | 2.07% (0.02074) | 87.44th | v3 (v2023.03.01) |
| Mar 7, 2023 | 1.84% (0.01841) | 86.41th | 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 (16)
- 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://www.securitytracker.com/id/1035457 vdb-entryx_refsource_SECTRACK
- http://www.squid-cache.org/Advisories/SQUID-2016_3.txt x_refsource_CONFIRMVendor Advisory
- http://www.squid-cache.org/Versions/v3/3.1/changesets/squid-3.1-10495.patch x_refsource_CONFIRMPatch
- http://www.squid-cache.org/Versions/v3/3.2/changesets/squid-3.2-11839.patch x_refsource_CONFIRMPatchThird Party AdvisoryUS Government Resource
- http://www.squid-cache.org/Versions/v3/3.3/changesets/squid-3.3-12694.patch x_refsource_CONFIRMPatch
- http://www.squid-cache.org/Versions/v3/3.4/changesets/squid-3.4-13232.patch x_refsource_CONFIRMPatch
- http://www.squid-cache.org/Versions/v3/3.5/changesets/squid-3.5-14015.patch x_refsource_CONFIRMPatch
- http://www.ubuntu.com/usn/USN-2995-1 vendor-advisoryx_refsource_UBUNTU
- https://access.redhat.com/security/cve/CVE-2016-3947 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1323590 Issue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2016-3947
- https://security.gentoo.org/glsa/201607-01 vendor-advisoryx_refsource_GENTOO
- https://www.cve.org/CVERecord?id=CVE-2016-3947
Change history (0)
No recorded changes yet.