Vulnerability identifier: #VU41841
Vulnerability risk: Medium
CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]
CVE-ID:
CWE-ID:
CWE-22
Exploitation vector: Network
Exploit availability: No
Vulnerable software:
linux-pam
Other software /
Other software solutions
Vendor: git.kernel.org
Description
The vulnerability allows a remote non-authenticated attacker to read and manipulate data.
Multiple directory traversal vulnerabilities in pam_timestamp.c in the pam_timestamp module for Linux-PAM (aka pam) 1.1.8 allow local users to create arbitrary files or possibly bypass authentication via a .. (dot dot) in the (1) PAM_RUSER value to the get_ruser function or (2) PAM_TTY value to the check_tty function, which is used by the format_timestamp_name function.
Mitigation
Install update from vendor's website.
Vulnerable software versions
linux-pam: 1.1.8
External links
http://secunia.com/advisories/57317
http://www.openwall.com/lists/oss-security/2014/03/24/5
http://www.openwall.com/lists/oss-security/2014/03/26/10
http://www.openwall.com/lists/oss-security/2014/03/31/6
http://www.securityfocus.com/bid/66493
http://www.ubuntu.com/usn/USN-2935-1
http://www.ubuntu.com/usn/USN-2935-2
http://www.ubuntu.com/usn/USN-2935-3
http://git.fedorahosted.org/cgit/linux-pam.git/commit/?id=Linux-PAM-1_1_8-32-g9dcead8
http://security.gentoo.org/glsa/201605-05
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.