#VU45417 Input validation error in linux-pam - CVE-2010-3431
Published: January 24, 2011 / Updated: August 11, 2020
Vulnerability identifier: #VU45417
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2010-3431
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
linux-pam
linux-pam
Software vendor:
git.kernel.org
git.kernel.org
Description
The vulnerability allows a remote non-authenticated attacker to gain access to sensitive information.
The privilege-dropping implementation in the (1) pam_env and (2) pam_mail modules in Linux-PAM (aka pam) 1.1.2 does not check the return value of the setfsuid system call, which might allow local users to obtain sensitive information by leveraging an unintended uid, as demonstrated by a symlink attack on the .pam_environment file in a user's home directory. NOTE: this vulnerability exists because of an incomplete fix for CVE-2010-3435.
Remediation
Install update from vendor's website.
External links
- http://git.altlinux.org/people/ldv/packages/?p=pam.git;a=commit;h=843807a3a90f52e7538be756616510730a24739a
- http://openwall.com/lists/oss-security/2010/09/21/10
- http://openwall.com/lists/oss-security/2010/09/21/3
- http://openwall.com/lists/oss-security/2010/09/21/8
- http://openwall.com/lists/oss-security/2010/09/21/9
- http://openwall.com/lists/oss-security/2010/09/27/10
- http://openwall.com/lists/oss-security/2010/09/27/4
- http://openwall.com/lists/oss-security/2010/09/27/5
- http://openwall.com/lists/oss-security/2010/09/27/7
- http://openwall.com/lists/oss-security/2010/10/03/1
- http://openwall.com/lists/oss-security/2010/10/25/2
- http://secunia.com/advisories/49711
- http://security.gentoo.org/glsa/glsa-201206-31.xml
- http://www.openwall.com/lists/oss-security/2010/09/21/11
- http://www.openwall.com/lists/oss-security/2010/09/24/2
- https://bugzilla.redhat.com/show_bug.cgi?id=641361