(RHSA-2005:061) squid security update

2005-02-11T05:00:00
ID RHSA-2005:061
Type redhat
Reporter RedHat
Modified 2019-03-22T23:43:19

Description

Squid is a full-featured Web proxy cache.

A buffer overflow flaw was found in the Gopher relay parser. This bug could allow a remote Gopher server to crash the Squid proxy that reads data from it. Although Gopher servers are now quite rare, a malicious web page (for example) could redirect or contain a frame pointing to an attacker's malicious gopher server. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CAN-2005-0094 to this issue.

An integer overflow flaw was found in the WCCP message parser. It is possible to crash the Squid server if an attacker is able to send a malformed WCCP message with a spoofed source address matching Squid's "home router". The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CAN-2005-0095 to this issue.

A memory leak was found in the NTLM fakeauth_auth helper. It is possible that an attacker could place the Squid server under high load, causing the NTML fakeauth_auth helper to consume a large amount of memory, resulting in a denial of service. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CAN-2005-0096 to this issue.

A NULL pointer de-reference bug was found in the NTLM fakeauth_auth helper. It is possible for an attacker to send a malformed NTLM type 3 message, causing the Squid server to crash. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CAN-2005-0097 to this issue.

A username validation bug was found in squid_ldap_auth. It is possible for a username to be padded with spaces, which could allow a user to bypass explicit access control rules or confuse accounting. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CAN-2005-0173 to this issue.

The way Squid handles HTTP responses was found to need strengthening. It is possible that a malicious web server could send a series of HTTP responses in such a way that the Squid cache could be poisoned, presenting users with incorrect webpages. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the names CAN-2005-0174 and CAN-2005-0175 to these issues.

A bug was found in the way Squid handled oversized HTTP response headers. It is possible that a malicious web server could send a specially crafted HTTP header which could cause the Squid cache to be poisoned, presenting users with incorrect webpages. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CAN-2005-0241 to this issue.

A buffer overflow bug was found in the WCCP message parser. It is possible that an attacker could send a malformed WCCP message which could crash the Squid server or execute arbitrary code. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CAN-2005-0211 to this issue.

Users of Squid should upgrade to this updated package, which contains backported patches, and is not vulnerable to these issues.