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Red Hat Enterprise Linux 6: Critical Samba Buffer Overflow Security Alert

red hat
Calendar Grey April 10, 2012
Dist Redhat Esm H88
Important samba revision for Red Hat addresses memory overflow, boosting protection. Comprehensive advisory details enclosed.
Updated samba packages that fix one security issue are now available for Red Hat Enterprise Linux 5 and 6; Red Hat Enterprise Linux 5.3 Long Life; and Red Hat Enterprise Linux 5.6,...

Solution

Before applying this update, make sure all previously-released errata relevant to your system have been applied.

This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at https://access.redhat.com/knowledge/articles/11258

Summary

Samba is an open-source implementation of the Server Message Block (SMB) or Common Internet File System (CIFS) protocol, which allows PC-compatible machines to share files, printers, and other information.
A flaw in the Samba suite's Perl-based DCE/RPC IDL (PIDL) compiler, used to generate code to handle RPC calls, resulted in multiple buffer overflows in Samba. A remote, unauthenticated attacker could send a specially-crafted RPC request that would cause the Samba daemon (smbd) to crash or, possibly, execute arbitrary code with the privileges of the root user. (CVE-2012-1182)
Users of Samba are advised to upgrade to these updated packages, which contain a backported patch to resolve this issue. After installing this update, the smb service will be restarted automatically.

Topics%20covered

Topics Covered

security advisory security update Red Hat buffer overflow critical software patch samba

References

https://access.redhat.com/security/cve/CVE-2012-1182 https://access.redhat.com/security/updates/classification/#critical

Package List

Red Hat Enterprise Linux Desktop (v. 5 client):
Source:
i386: libsmbclient-3.0.33-3.39.el5_8.i386.rpm samba-3.0.33-3.39.el5_8.i386.rpm samba-client-3.0.33-3.39.el5_8.i386.rpm samba-common-3.0.33-3.39.el5_8.i386.rpm samba-debuginfo-3.0.33-3.39.el5_8.i386.rpm samba-swat-3.0.33-3.39.el5_8.i386.rpm
x86_64: libsmbclient-3.0.33-3.39.el5_8.i386.rpm libsmbclient-3.0.33-3.39.el5_8.x86_64.rpm samba-3.0.33-3.39.el5_8.x86_64.rpm samba-client-3.0.33-3.39.el5_8.x86_64.rpm samba-common-3.0.33-3.39.el5_8.i386.rpm samba-common-3.0.33-3.39.el5_8.x86_64.rpm samba-debuginfo-3.0.33-3.39.el5_8.i386.rpm samba-debuginfo-3.0.33-3.39.el5_8.x86_64.rpm samba-swat-3.0.33-3.39.el5_8.x86_64.rpm
RHEL Desktop Workstation (v. 5 client):
Source:
i386: libsmbclient-devel-3.0.33-3.39.el5_8.i386.rpm samba-debuginfo-3.0.33-3.39.el5_8.i386.rpm
x86_64: libsmbclient-devel-3.0.33-3.39.el5_8.i386.rpm libsmbclient-devel-3.0.33-3.39.el5_8.x86_64.rpm samba-debuginfo-3.0.33-3.39.el5_8.i386.rpm samba-debuginfo-3.0.33-3.39.el5_8.x86_64.rpm
Red Hat Enterprise Linux Long Life (v. 5.3 server):
Source: samba-3.0.33-3.7.el5_3.5.src.rpm
i386: samba-3.0.33-3.7.el5_3.5.i386.rpm samba-client-3.0.33-3.7.el5_3.5.i386.rpm samba-common-3.0.33-3.7.el5_3.5.i386.rpm samba-debuginfo-3.0.33-3.7.el5_3.5.i386.rpm

Read the Full Advisory


Severity
critical
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2012:0465-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2012:0465.html
Issue date: 2012-04-10

Topic

Updated samba packages that fix one security issue are now available forRed Hat Enterprise Linux 5 and 6; Red Hat Enterprise Linux 5.3 Long Life;and Red Hat Enterprise Linux 5.6, 6.0 and 6.1 Extended Update Support.The Red Hat Security Response Team has rated this update as having criticalsecurity impact. A Common Vulnerability Scoring System (CVSS) base score,which gives a detailed severity rating, is available from the CVE link inthe References section.

Topics%20covered

Topics Covered

security advisory security update Red Hat buffer overflow critical software patch samba

Relevant Releases Architectures

RHEL Desktop Workstation (v. 5 client) - i386, x86_64

Red Hat Enterprise Linux (v. 5 server) - i386, ia64, ppc, s390x, x86_64

Red Hat Enterprise Linux Desktop (v. 5 client) - i386, x86_64

Red Hat Enterprise Linux Desktop (v. 6) - i386, x86_64

Red Hat Enterprise Linux Desktop Optional (v. 6) - i386, x86_64

Red Hat Enterprise Linux EUS (v. 5.6 server) - i386, ia64, ppc, s390x, x86_64

Red Hat Enterprise Linux HPC Node (v. 6) - x86_64

Red Hat Enterprise Linux HPC Node Optional (v. 6) - x86_64

Red Hat Enterprise Linux Long Life (v. 5.3 server) - i386, ia64, x86_64

Red Hat Enterprise Linux Server (v. 6) - i386, ppc64, s390x, x86_64

Red Hat Enterprise Linux Server EUS (v. 6.0) - i386, ppc64, s390x, x86_64

Red Hat Enterprise Linux Server EUS (v. 6.1) - i386, ppc64, s390x, x86_64

Red Hat Enterprise Linux Server Optional (v. 6) - i386, ppc64, s390x, x86_64

Red Hat Enterprise Linux Server Optional (v. 6.0.z) - i386, ppc64, s390x, x86_64

Red Hat Enterprise Linux Workstation (v. 6) - i386, x86_64

Red Hat Enterprise Linux Workstation Optional (v. 6) - i386, x86_64

Bugs Fixed

804093 - CVE-2012-1182 samba: Multiple heap-based buffer overflows in memory management based on NDR marshalling code output

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