SuSE Linux shadow filesize limits could be used to destroy data in the etc/passwd and etc/shadow files or gain elevated privileges

suse-shadow-filesize-limits (9102) The risk level is classified as MediumMedium Risk

Description:

The shadow package in SuSE Linux could allow a local attacker to destroy data in the etc/passwd and etc/shadow files or use these files to gain elevated privileges. A local attacker could set improper filesize limits prior to invoking one of the programs that modifies these files, to corrupt the files, which could lead to a denial of service, or allow the attacker to gain elevated privileges.


Consequences:

Gain Privileges

Remedy:

Upgrade to the latest version of shadow (4.0.2-88 or later) and pam-modules (2002.3.9-31 or later), as listed in SuSE Security Announcement SuSE-SA:2002:017. See References.

References:

  • BID-4757: SuSE Shadow File Truncation Vulnerability
  • CVE-2002-0762: shadow package in SuSE 8.0 allows local users to destroy the /etc/passwd and /etc/shadow files or assign extra group privileges to some users by changing filesize limits before calling programs that modify the files.
  • OSVDB ID: 5087: SuSE shadow Package File Overwrite

Platforms Affected:

  • SUSE SuSE Linux 8.0

Reported:

May 16, 2002

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