Missing Authentication for Critical Function in Debian Linux

1) Missing Authentication for Critical Function

EUVDB-ID: #VU35026

Risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2011-2187

CWE-ID: CWE-306 - Missing Authentication for Critical Function

Exploit availability: No

Description

The vulnerability allows a local authenticated user to execute arbitrary code.

xscreensaver before 5.14 crashes during activation and leaves the screen unlocked when in Blank Only Mode and when DPMS is disabled, which allows local attackers to access resources without authentication.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Debian Linux: 8.0 - 9.0

CPE2.3

• cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
• cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*

External links

https://access.redhat.com/security/cve/cve-2011-2187
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=627382
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2011-2187
https://security-tracker.debian.org/tracker/CVE-2011-2187
https://www.jwz.org/xscreensaver/changelog.html
https://www.openwall.com/lists/oss-security/2011/06/06/17

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.