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Trustix Fcron "convert-fcrontab" Two Vulnerabilities
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Secunia Advisory:
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SA18719
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Release Date:
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2006-02-03
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Last Update:
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2006-07-20
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Popularity:
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7,409 views
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Critical:
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Less critical
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Impact:
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Privilege escalation
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Where:
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Local system
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Solution Status:
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Vendor Patch
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| OS: | Trustix Secure Linux 2.2
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Secunia CVSS-2 Score:
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| Advisory Content (Page 1 of 3) | [ 1 ] [ 2 ] [ 3 ] | |
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Description:
Two vulnerabilities have been reported in Fcron, which can be exploited by malicious, local users to gain escalated privileges.
1) A boundary error exists in convert-fcrontab when handling an overly long username supplied via the command line. This can be exploited to cause a heap-based buffer overflow and may allow arbitrary code execution.
2) Missing validation of the username supplied to convert-fcrontab can be exploited to cause the application to create temporary files insecurely outside of "/var/spool/fcron" via directory traversal attacks. This can be exploited via symlink attacks to create or overwrite arbitrary files with the privileges of the root user.
Successful exploitation requires that convert-fcrontab is setuid root (reportedly default setting on Trustix 2.2).
The vulnerability has been reported in Fcron version 2.9.5 included with Trustix 2.2. Other versions may also be affected.
Change Page:
[ 1 ] [ 2 ] [ 3 ]
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