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FreeBSD : cups-lpr -- lppasswd multiple vulnerabilities (7850a238-680a-11d9-a9e7-0001020eed82)
medium Nessus Plugin ID 18990
Synopsis
The remote FreeBSD host is missing one or more security-related updates.Description
D. J. Bernstein reports that Bartlomiej Sieka has discovered several security vulnerabilities in lppasswd, which is part of CUPS. In the following excerpt from Bernstein's email, CVE names have been added for each issue :First, lppasswd blithely ignores write errors in fputs(line,outfile) at lines 311 and 315 of lppasswd.c, and in fprintf(...) at line 346.
An attacker who fills up the disk at the right moment can arrange for /usr/local/etc/cups/passwd to be truncated. (CAN-2004-1268)
Second, if lppasswd bumps into a file-size resource limit while writing passwd.new, it leaves passwd.new in place, disabling all subsequent invocations of lppasswd. Any local user can thus disable lppasswd... (CAN-2004-1269)
Third, line 306 of lppasswd.c prints an error message to stderr but does not exit. This is not a problem on systems that ensure that file descriptors 0, 1, and 2 are open for setuid programs, but it is a problem on other systems; lppasswd does not check that passwd.new is different from stderr, so it ends up writing a user-controlled error message to passwd if the user closes file descriptor 2.
(CAN-2004-1270)
Note: The third issue, CVE-2004-1270, does not affect FreeBSD 4.6-RELEASE or later systems, as these systems ensure that the file descriptors 0, 1, and 2 are always open for set-user-ID and set-group-ID programs.
Solution
Update the affected packages.See Also
https://github.com/apple/cups/issues/1023
Plugin Details
Severity: Medium
ID: 18990
File Name: freebsd_pkg_7850a238680a11d9a9e70001020eed82.nasl
Version: 1.24
Type: local
Family: FreeBSD Local Security Checks
Published: 7/13/2005
Updated: 1/6/2021
Supported Sensors: Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 4.4
CVSS v2
Risk Factor: Medium
Base Score: 5
Temporal Score: 4.4
Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P
Vulnerability Information
CPE: p-cpe:/a:freebsd:freebsd:cups-lpr, p-cpe:/a:freebsd:freebsd:fr-cups-lpr, 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: 1/17/2005
Vulnerability Publication Date: 12/11/2004