#VU45416 Input validation error in linux-pam - CVE-2010-3430
Published: January 24, 2011 / Updated: August 11, 2020
Vulnerability identifier: #VU45416
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2010-3430
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 perform the required setfsgid and setgroups system calls, which might allow local users to obtain sensitive information by leveraging unintended group permissions, 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