util-linux "login" using pam_limits could allow a local attacker to gain elevated privileges
| utillinux-pamlimits-gain-privileges (7266) |  Medium Risk |
Description:
The util-linux package included with some Linux distributions could allow a local attacker to gain elevated privileges on the system. If pam_limits is used to regulate the number of users that access the system using the 'login' program, some users may gain the privileges of console or pts/o upon logging into the system.
Consequences:
Gain Privileges
Remedy:
For Red Hat Linux 7.1:
Upgrade to the latest version of util-linux (2.11f-11.7.1 or later), as listed in RHSA-2001:132-04. See References.
For Red Hat Linux 7.2:
Upgrade to the latest version of util-linux (2.11f-12 or later), as listed in RHSA-2001:132-04. See References.
For Trustix Secure Linux 1.5:
Upgrade to the latest version of util-linux (2.11f-6tr or later), as listed in Trustix Secure Linux Security Advisory #2001-0025. See References.
For SuSE Linux 6.3 and 6.4 (i386 Intel):
Upgrade to the latest version of shadow (19990827-145 or later), as listed in SuSE Security Announcement SuSE-SA:2001:034. See References.
For SuSE Linux 7.0 (i386 Intel):
Upgrade to the latest version of shadow (19990827-170 or later), as listed in SuSE Security Announcement SuSE-SA:2001:034. See References.
For SuSE Linux 7.1 and 7.2 (i386 Intel):
Upgrade to the latest version of shadow (20000902-145 or later), as listed in SuSE Security Announcement SuSE-SA:2001:034. See References.
For SuSE Linux 7.3 (i386 Intel):
Upgrade to the latest version of shadow (19990827-144 or later), as listed in SuSE Security Announcement SuSE-SA:2001:034. See References.
For SuSE Linux 7.0 (Sparc):
Upgrade to the latest version of shadow (19990827-2 or later), as listed in SuSE Security Announcement SuSE-SA:2001:034. See References.
For SuSE Linux 7.1 (Sparc):
Upgrade to the latest version of shadow (20000902-92 or later), as listed in SuSE Security Announcement SuSE-SA:2001:034. See References.
For SuSE Linux 6.3, 6.4, 7.0 (AXP Alpha):
Upgrade to the latest version of shadow (19990827-74 or later), as listed in SuSE Security Announcement SuSE-SA:2001:034. See References.
For SuSE Linux 7.1 (AXP Alpha):
Upgrade to the latest version of shadow (20000902-88 or later), as listed in SuSE Security Announcement SuSE-SA:2001:034. See References.
For SuSE Linux 6.4 and 7.0 (PPC Power PC):
Upgrade to the latest version of shadow (19990827-182 or later), as listed in SuSE Security Announcement SuSE-SA:2001:034. See References.
For SuSE Linux 7.1 (PPC Power PC):
Upgrade to the latest version of shadow (20000902-61 or later), as listed in SuSE Security Announcement SuSE-SA:2001:034. See References.
For Mandrake Linux 8.0:
Upgrade to the latest version of util-linux (2.10s-3.1mdk or later), as listed in MandrakeSoft Security Advisory MDKSA-2001:084 : util-linux. See References.
For Mandrake Linux 8.0 (PPC):
Upgrade to the latest version of util-linux (2.11h-3.2mdk or later), as listed in MandrakeSoft Security Advisory MDKSA-2001:084 : util-linux. See References.
For Mandrake Linux 8.1:
Upgrade to the latest version of util-linux (2.11h-3.1mdk or later), as listed in MandrakeSoft Security Advisory MDKSA-2001:084 : util-linux. See References.
For other distributions:
Contact your vendor for patch or upgrade information.
References:
- BugTraq Mailing List, Mon Oct 08 2001 - 08:52:57 CDT: pam_limits.so Bug!!.
- BugTraq Mailing List, Tue Oct 09 2001 - 00:10:27 CDT: Re: pam_limits.so Bug!!.
- CIAC Information Bulletin M-009: Red Hat Linux PAM Vulnerability.
- SuSE Security Announcement SuSE-SA:2001:034: shadow/login.
- Trustix Secure Linux Security Advisory #2001-0025: Util-linux.
- BID-3415: Util-Linux Login Pam Privilege Elevation Vulnerability
- CVE-2001-1147: The PAM implementation in /bin/login of the util-linux package before 2.11 causes a password entry to be rewritten across multiple PAM calls, which could provide the credentials of one user to a different user, when used in certain PAM modules such as pam_limits.
- RHSA-2001-132: New util-linux packages available to fix /bin/login pam problem
Platforms Affected:
- Kernel util-linux 2.11h
- Kernel util-linux 2.11i
- Kernel util-linux 2.11k
- Kernel util-linux 2.11l
- MandrakeSoft Mandrake Linux 8.0
- MandrakeSoft Mandrake Linux 8.1
- RedHat Linux 6.2
- RedHat Linux 7
- RedHat Linux 7.1
- RedHat Linux 7.2
- RedHat Linux 7.3
- SUSE SuSE Linux 6.3
- SUSE SuSE Linux 6.4
- SUSE SuSE Linux 7.0
- SUSE SuSE Linux 7.1
- SUSE SuSE Linux 7.2
- SUSE SuSE Linux 7.3
- Trustix Secure Linux 1.5
Reported:
Oct 08, 2001
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