Synopsis
The remote Scientific Linux host is missing a security update.
Description
A flaw was found in the way Squid processed certain external ACL helper HTTP header fields that contained a delimiter that was not a comma. A remote attacker could issue a crafted request to the Squid server, causing excessive CPU use (up to 100%). (CVE-2009-2855)
Note: The CVE-2009-2855 issue only affected non-default configurations that use an external ACL helper script.
A flaw was found in the way Squid handled truncated DNS replies. A remote attacker able to send specially crafted UDP packets to Squid's DNS client port could trigger an assertion failure in Squid's child process, causing that child process to exit. (CVE-2010-0308)
This update also fixes the following bugs :
- Squid's init script returns a non-zero value when trying to stop a stopped service. This is not LSB compliant and can generate difficulties in cluster environments. This update makes stopping LSB compliant. (BZ#521926)
- Squid is not currently built to support MAC address filtering in ACLs. This update includes support for MAC address filtering. (BZ#496170)
- Squid is not currently built to support Kerberos negotiate authentication. This update enables Kerberos authentication. (BZ#516245)
- Squid does not include the port number as part of URIs it constructs when configured as an accelerator. This results in a 403 error. This update corrects this behavior. (BZ#538738)
- the error_map feature does not work if the same handling is set also on the HTTP server that operates in deflate mode. This update fixes this issue. (BZ#470843)
After installing this update, the squid service will be restarted automatically.
Solution
Update the affected squid package.
Plugin Details
File Name: sl_20100330_squid_on_SL5_x.nasl
Agent: unix
Supported Sensors: Nessus Agent, Nessus
Risk Information
Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P
Vulnerability Information
CPE: x-cpe:/o:fermilab:scientific_linux
Required KB Items: Host/local_checks_enabled, Host/cpu, Host/RedHat/release, Host/RedHat/rpm-list
Patch Publication Date: 3/30/2010