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FreeBSD : sudo -- Privilege escalation with sudoedit (018a84d0-2548-11df-b4a3-00e0815b8da8)
medium Nessus Plugin ID 44952
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Synopsis
The remote FreeBSD host is missing a security-related update.Description
Todd Miller reports :When sudo performs its command matching, there is a special case for pseudo-commands in the sudoers file (currently, the only pseudo-command is sudoedit). Unlike a regular command, pseudo-commands do not begin with a slash ('/'). The flaw is that sudo's the matching code would only check against the list of pseudo-commands if the user-specified command also contained no slashes. As a result, if the user ran 'sudo ./sudoedit' the normal matching code path was followed, which uses stat(2) to verify that the user-specified command matches the one in sudoers. In this case, it would compare the './sudoedit' specified by the user with 'sudoedit' from the sudoers file, resulting in a positive match.
Solution
Update the affected package.See Also
https://www.sudo.ws/pipermail/sudo-announce/2010-February/000092.html
Plugin Details
Severity: Medium
ID: 44952
File Name: freebsd_pkg_018a84d0254811dfb4a300e0815b8da8.nasl
Version: 1.15
Type: local
Family: FreeBSD Local Security Checks
Published: 3/2/2010
Updated: 1/6/2021
Supported Sensors: Nessus
Risk Information
VPR
Risk Factor: High
Score: 7.4
CVSS v2
Risk Factor: Medium
Base Score: 6.9
Temporal Score: 5.7
Vector: CVSS2#AV:L/AC:M/Au:N/C:C/I:C/A:C
Vulnerability Information
CPE: p-cpe:/a:freebsd:freebsd:sudo, cpe:/o:freebsd:freebsd
Required KB Items: Host/local_checks_enabled, Host/FreeBSD/release, Host/FreeBSD/pkg_info
Exploit Available: true
Exploit Ease: Exploits are available
Patch Publication Date: 3/1/2010
Vulnerability Publication Date: 1/29/2010
Exploitable With
Core Impact
Reference Information
CVE: CVE-2010-0426
BID: 38362