FreeBSD VuXML: Documenting security issues in FreeBSD and the FreeBSD Ports Collection

squid -- multiple vulnerabilities

Affected packages
squid < 3.5.16


VuXML ID 297117ba-f92d-11e5-92ce-002590263bf5
Discovery 2016-03-28
Entry 2016-04-02

Squid security advisory 2016:3 reports:

Due to a buffer overrun Squid pinger binary is vulnerable to denial of service or information leak attack when processing ICMPv6 packets.

This bug also permits the server response to manipulate other ICMP and ICMPv6 queries processing to cause information leak.

This bug allows any remote server to perform a denial of service attack on the Squid service by crashing the pinger. This may affect Squid HTTP routing decisions. In some configurations, sub-optimal routing decisions may result in serious service degradation or even transaction failures.

If the system does not contain buffer-overrun protection leading to that crash this bug will instead allow attackers to leak arbitrary amounts of information from the heap into Squid log files. This is of higher importance than usual because the pinger process operates with root priviliges.

Squid security advisory 2016:4 reports:

Due to incorrect bounds checking Squid is vulnerable to a denial of service attack when processing HTTP responses.

This problem allows a malicious client script and remote server delivering certain unusual HTTP response syntax to trigger a denial of service for all clients accessing the Squid service.


CVE Name CVE-2016-3947
CVE Name CVE-2016-3948
FreeBSD PR ports/208463