Debian Apache tty privilege escalation

debian-apache-tty-privilege-escalation (32708)

High Risk

Description:

Debian Linux could allow a local attacker to gain elevated privileges caused by an error in the Apache server. The Apache server does not release the controlling tty. If the Apache server is manually started and the root shell is not closed, a local attacker could send a specially-crafted CGI script to gain root privileges on the system.

*CVSS:

Base Score:	5.6
Access Vector:	Local
Access Complexity:	High
Authentication:	Not Required
Confidentiality Impact:	Complete
Integrity Impact:	Complete
Availability Impact:	Complete
Temporal Score:	5.1
Exploitability:	Functional
Remediation Level:	Unavailable
Report Confidence:	Uncorroborated

Consequences:

Gain Privileges

Remedy:

Upgrade to the latest version of Debian Apache, available to users from the Debian Web site. See References.

References:

• Debian Web site: Debian -- The Universal Operating System.
• Full-Disclosure Mailing List, Mon Feb 26 2007 - 12:11:23 CST: Local user to root escalation in apache 1.3.34 (Debian only).
• BID-22732: Debian Apache Root Shell Local Privilege Escalation Vulnerabilities
• CVE-2006-7098: The Debian GNU/Linux 033_-F_NO_SETSID patch for the Apache HTTP Server 1.3.34-4 does not properly disassociate httpd from a controlling tty when httpd is started interactively, which allows local users to gain privileges to that tty via a CGI program that calls the TIOCSTI ioctl.
• SA24324: Debian Apache Privilege Escalation

Platforms Affected:

• Apache Debian HTTP Server 1.3.34.4
• Debian Debian Linux

Reported:

Feb 26, 2007

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