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.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | squid | 4.1-1 | — |
| Debian 13 | squid | 4.1-1 | — |
| Debian 12 | squid | 4.1-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | squid3 | 3.5.12-1ubuntu7.2 | USN-2995-1 |
| Ubuntu 14.04 LTS | squid3 | 3.3.8-1ubuntu6.8 | USN-2995-1 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP1 | squid | 3.3.14-20.2 | SUSE-SU-2016:2008-1 |
| SLES 11 SP4 | squid3 | 3.1.23-8.16.30.1 | SUSE-SU-2016:2089-1 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP1 | squid | 3.3.14-20.2 | SUSE-SU-2016:2008-1 |
| SLES for SAP 11 SP4 | squid3 | 3.1.23-8.16.30.1 | SUSE-SU-2016:2089-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | squid | 4.16-1.5 | openSUSE-SU-2024:11403-1 |
Advisories 4
- USN-2995-1 squid3 vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- SUSE-SU-2016:2008-1 Security update for squid SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:11403-1 squid-4.16-1.5 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:2089-1 Security update for squid3 SUSE / openSUSE Security Updates · Feb 4, 2026
References
- http://www.squid-cache.org/Versions/v3/3.5/changesets/squid-3.5-14015.patch
- GLSA-201607-01 vendor-advisory
- SUSE-SU-2016:1996 vendor-advisory
- http://www.squid-cache.org/Versions/v3/3.2/changesets/squid-3.2-11839.patch
- http://www.squid-cache.org/Advisories/SQUID-2016_3.txt
- USN-2995-1 vendor-advisory
- http://www.squid-cache.org/Versions/v3/3.1/changesets/squid-3.1-10495.patch
- 1035457 vdb-entry
- openSUSE-SU-2016:2081 vendor-advisory
- SUSE-SU-2016:2089 vendor-advisory
- http://www.squid-cache.org/Versions/v3/3.4/changesets/squid-3.4-13232.patch
- http://www.squid-cache.org/Versions/v3/3.3/changesets/squid-3.3-12694.patch