RSyslog AllowedSender security bypass

rsyslog-allowedsender-security-bypass (47080)

Medium Risk

Description:

RSyslog could allow a remote attacker to bypass security restrictions, caused by the improper handling of ACL by the "AllowedSender" configuration device. A remote attacker could exploit this vulnerability to bypass security restrictions and gain unauthorized access to the application.

*CVSS:

Base Score:	7.5
Access Vector:	Network
Access Complexity:	Low
Authentication:	None
Confidentiality Impact:	Partial
Integrity Impact:	Partial
Availability Impact:	Partial
Temporal Score:	5.5
Exploitability:	Unproven
Remediation Level:	Official-Fix
Report Confidence:	Confirmed

Consequences:

Bypass Security

Remedy:

Upgrade to the latest version of RSyslog (3.21.9 or later), available from the RSyslog Web site. See References.

References:

• RSyslog Security Advisory 322: $AllowedSender not honored.
• RSyslog Web site: RSyslog.
• BID-32630: RSyslog '$AllowedSender' Configuration Directive Security Bypass Vulnerability
• CVE-2008-5617: The ACL handling in rsyslog 3.12.1 to 3.20.0, 4.1.0, and 4.1.1 does not follow $AllowedSender directive, which allows remote attackers to bypass intended access restrictions and spoof log messages or create a large number of spurious messages.
• SA32857: RSyslog "AllowedSender" Security Bypass Vulnerability
• SUSE-SR:2009:001: SUSE Security Summary Report

Platforms Affected:

• RSyslog RSyslog 3.12.1
• RSyslog RSyslog 3.20
• RSyslog RSyslog 4.1
• RSyslog RSyslog 4.1.1

Reported:

Dec 04, 2008

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The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.

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