CVE-2016-3947

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.

Category

8.2
CVSS
Severity: High
CVSS 3.0 •
CVSS 2.0 •
EPSS 76.65% Top 5%
Vendor Advisory gentoo.org Vendor Advisory opensuse.org Vendor Advisory ubuntu.com Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory squid-cache.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
http://www.squid-cache.org/Versions/v3/3.5/changesets/squid-3.5-14015.patch patch
https://security.gentoo.org/glsa/201607-01 vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00010.html vendor advisory
http://www.squid-cache.org/Versions/v3/3.2/changesets/squid-3.2-11839.patch patch third party advisory us government resource
http://www.squid-cache.org/Advisories/SQUID-2016_3.txt vendor advisory
http://www.ubuntu.com/usn/USN-2995-1 vendor advisory
http://www.squid-cache.org/Versions/v3/3.1/changesets/squid-3.1-10495.patch patch
http://www.securitytracker.com/id/1035457 vdb entry
http://lists.opensuse.org/opensuse-updates/2016-08/msg00069.html vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00040.html vendor advisory
http://www.squid-cache.org/Versions/v3/3.4/changesets/squid-3.4-13232.patch patch
http://www.squid-cache.org/Versions/v3/3.3/changesets/squid-3.3-12694.patch patch

Frequently Asked Questions

What is the severity of CVE-2016-3947?
CVE-2016-3947 has been scored as a high severity vulnerability.
How to fix CVE-2016-3947?
To fix CVE-2016-3947, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2016-3947 being actively exploited in the wild?
It is possible that CVE-2016-3947 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~77% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.