Scientific Linux Security Update : squid on SL5.x i386/x86_64

Medium Nessus Plugin ID 60775

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VPR Score: 4.4


The remote Scientific Linux host is missing a security update.


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.


Update the affected squid package.

See Also

Plugin Details

Severity: Medium

ID: 60775

File Name: sl_20100330_squid_on_SL5_x.nasl

Version: 1.6

Type: local

Agent: unix

Published: 2012/08/01

Updated: 2021/01/14

Dependencies: 12634

Risk Information

Risk Factor: Medium

VPR Score: 4.4

CVSS v2.0

Base Score: 5

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: 2010/03/30

Reference Information

CVE: CVE-2009-2855, CVE-2010-0308

CWE: 20