Fcron convert-fcrontab syslog() buffer overflow

fcron-syslog-bo (24444)

High Risk

Description:

Fcron is vulnerable to a heap-based buffer overflow, caused by improper bounds checking by the syslog() function of convert-fcrontab. By calling a program with an overly long argument, a local attacker could overflow a buffer and cause the system to crash or possibly execute arbitrary code on the system.

*CVSS:

Base Score:	4.9
Access Vector:	Local
Access Complexity:	Low
Authentication:	Not Required
Confidentiality Impact:	Partial
Integrity Impact:	Partial
Availability Impact:	Partial
Temporal Score:	4
Exploitability:	Unproven
Remediation Level:	Unavailable
Report Confidence:	Uncorroborated

Consequences:

Gain Privileges

Remedy:

Upgrade to the latest version of Fcron (2.9.5.1-4tr or later), available from the Fcron Web site. See References.

References:

• Fcron Web site: Welcome to Fcron's home page !.
• Full-Disclosure Mailing List, Wed Feb 01 2006 - 08:28:50 CST : Fcrontab - memory corruption on heap.
• BID-16467: Fcron Convert-FCronTab Local Buffer Overflow Vulnerability
• CVE-2006-0539: The convert-fcrontab program in fcron 3.0.0 might allow local users to gain privileges via a long command-line argument, which causes Linux glibc to report heap memory corruption, possibly because a strcpy in the strdup2 function can overwrite some data.
• SA18719: Trustix Fcron "convert-fcrontab" Two Vulnerabilities

Platforms Affected:

• Thibault Godouet Fcron

Reported:

Feb 01, 2006

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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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