Vulnerability identifier: #VU45412

Vulnerability risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2010-4707

CWE-ID: CWE-399

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 gain access to sensitive information.

The check_acl function in pam_xauth.c in the pam_xauth module in Linux-PAM (aka pam) 1.1.2 and earlier does not verify that a certain ACL file is a regular file, which might allow local users to cause a denial of service (resource consumption) via a special file.

Mitigation
Install update from vendor's website.

Vulnerable software versions

linux-pam: 0.99.1.0 - 1.1.1

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External links
http://git.altlinux.org/people/ldv/packages/?p=pam.git;a=commit;h=Linux-PAM-1_1_2-2-gffe7058c70253d574b1963c7c93002bd410fddc9
http://openwall.com/lists/oss-security/2010/10/03/1
http://secunia.com/advisories/49711
http://security.gentoo.org/glsa/glsa-201206-31.xml
http://www.securityfocus.com/bid/46045
http://exchange.xforce.ibmcloud.com/vulnerabilities/65036

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Q & A

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.