7.5 - RHSA-2005:415

Problem Description:

An updated squid package that fixes several security issues is now available.

This update has been rated as having low security impact by the Red Hat Security Response Team.

2. Relevant releases/architectures:

Red Hat Enterprise Linux AS version 3 - i386, ia64, ppc, s390, s390x, x86_64 Red Hat Desktop version 3 - i386, x86_64 Red Hat Enterprise Linux ES version 3 - i386, ia64, x86_64 Red Hat Enterprise Linux WS version 3 - i386, ia64, x86_64 Red Hat Enterprise Linux AS version 4 - i386, ia64, ppc, s390, s390x, x86_64 Red Hat Enterprise Linux Desktop version 4 - i386, x86_64 Red Hat Enterprise Linux ES version 4 - i386, ia64, x86_64 Red Hat Enterprise Linux WS version 4 - i386, ia64, x86_64

3. Problem description:

Squid is a full-featured Web proxy cache.
A race condition bug was found in the way Squid handles the now obsolete Set-Cookie header. It is possible that Squid can leak Set-Cookie header information to other clients connecting to Squid. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CAN-2005-0626 to this issue. Please note that this issue only affected Red Hat Enterprise Linux 4.
A bug was found in the way Squid handles PUT and POST requests. It is possible for an authorised remote user to cause a failed PUT or POST request which can cause Squid to crash. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CAN-2005-0718 to this issue.
A bug was found in the way Squid processes errors in the access control list. It is possible that an error in the access control list could give users more access than intended. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CAN-2005-1345 to this issue.
A bug was found in the way Squid handles access to the cachemgr.cgi script. It is possible for an authorised remote user to bypass access control lists with this flaw. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CVE-1999-0710 to this issue.
A bug was found in the way Squid handles DNS replies. If the port Squid uses for DNS requests is not protected by a firewall it is possible for a remote attacker to spoof DNS replies, possibly redirecting a user to spoofed or malicious content. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CAN-2005-1519 to this issue.
Additionally this update fixes the following bugs:
- LDAP Authentication fails with an assertion error when using Red Hat Enterprise Linux 4
Users of Squid should upgrade to this updated package, which contains backported patches to correct these issues.

4. Solution:

Before applying this update, make sure that all previously-released errata relevant to your system have been applied. Use Red Hat Network to download and update your packages. To launch the Red Hat Update Agent, use the following command:

up2date

For information on how to install packages manually, refer to the following Web page for the System Administration or Customization guide specific to your system:

http://www.redhat.com/docs/manuals/enterprise/

5. Bug IDs fixed (http://bugzilla.redhat.com/):

125007 - insecure permissions for squid.conf 150232 - CAN-2005-0626 Cookie leak in squid 150907 - LDAP Authentication fails with an assertion error. 151412 - CAN-2005-1345 Unexpected access control results on configuration errors 151423 - CAN-2005-0718 Segmentation fault on failed PUT/POST request 156161 - CVE-1999-0710 cachemgr.cgi access control bypass 157455 - CAN-2005-1519 DNS lookups unreliable on untrusted networks