Debian login symlink
| debian-login-symlink (47037) |  Medium Risk |
Description:
The Debian login package could allow a local attacker to launch a symlink attack. Temporary files are created insecurely. A local attacker in the utmp group could exploit this vulnerability by creating a symbolic link from a temporary file to various files on the system, which could allow the attacker to overwrite arbitrary files on the system with elevated privileges.
*CVSS:
| Base Score: | 3.3 |
| Access Vector: | Local |
| Access Complexity: | Medium |
| Authentication: | None |
| Confidentiality Impact: | None |
| Integrity Impact: | Partial |
| Availability Impact: | Partial |
| Temporal Score: | 2.9 |
| Exploitability: | High |
| Remediation Level: | Official-Fix |
| Report Confidence: | Confirmed |
Consequences:
File Manipulation
Remedy:
Upgrade to the latest version of login (1:4.1.1-6 or later), available from the Debian Web site. See References.
References:
- Debian Bug report logs - #505271: symlink attack in login leading to arbitrary file ownership.
- Debian Web site: Debian -- Details of package login in etch.
- BID-32552: Multiple Linux Distributions 'login' Local Privilege Escalation Vulnerability
- CVE-2008-5394: /bin/login in shadow 4.0.18.1 in Debian GNU/Linux, and probably other Linux distributions, allows local users in the utmp group to overwrite arbitrary files via a symlink attack on a temporary file referenced in a line (aka ut_line) field in a utmp entry.
- DSA-1709: shadow -- race condition
- GLSA-200903-24: Shadow: Privilege escalation
- MDVSA-2009:062: shadow-utils
- USN-695-1: shadow vulnerability
Platforms Affected:
- Canonical Ubuntu 6.06 LTS
- Canonical Ubuntu 7.10
- Canonical Ubuntu 8.04 LTS
- Canonical Ubuntu 8.10
- Debian Debian Linux 4.0
- Debian login 1:4.0.18.1-7
- Gentoo Linux
- MandrakeSoft Mandrake Linux 2008.0 X86_64
- MandrakeSoft Mandrake Linux 2008.0
- MandrakeSoft Mandrake Linux 2008.1 X86_64
- MandrakeSoft Mandrake Linux 2008.1
- MandrakeSoft Mandrake Linux Corporate Server 3.0 X86_64
- MandrakeSoft Mandrake Linux Corporate Server 3.0
- MandrakeSoft Mandrake Linux Corporate Server 4.0 X86_64
- MandrakeSoft Mandrake Linux Corporate Server 4.0
- MandrakeSoft Mandrake Multi Network Firewall 2.0
- Mandriva Linux 2009.0 X86_64
- Mandriva Linux 2009.0
Reported:
Nov 09, 2008
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The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.