CVE-2016-3947 Memory corruption in n/a

What is CVE-2016-3947?

CVE-2016-3947 is a high-severity memory corruption vulnerability in Canonical Ubuntu Linux, published on 7 Apr 2016. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official 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.

Weakness: CWE-119

Which versions are affected by CVE-2016-3947?

It affects 2 products.

Products include Canonical Ubuntu Linux, Squid-Cache Squid.

How do I fix CVE-2016-3947?

Upgrade to a fixed version.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2016-3947 being exploited?

There is no known exploitation of CVE-2016-3947 in the wild and no public exploit code.

Other vulnerabilities in Canonical Ubuntu Linux

• CVE-2020-11651 SaltStack Salt Authentication Bypass Exploited Critical 9.8
• CVE-2020-7247 OpenSMTPD Remote Code Execution Exploited Critical 9.8
• CVE-2019-16928 Exim Out-of-bounds Write Exploited Critical 9.8
• CVE-2018-6789 Exim Buffer Overflow Exploited Critical 9.8
• CVE-2015-2590 Oracle Java SE and Java SE Embedded Remote Code Execution Exploited Critical 9.8

All Canonical Ubuntu Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2016-3947, GHSA-59fp-mgp3-qph8, UBUNTU-CVE-2016-3947.