Information disclosure in KDE Frameworks

1) Incorrect default permissions

EUVDB-ID: #VU20303

Risk: Low

CVSSv4.0: 1.1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2016-3100

CWE-ID: CWE-276 - Incorrect Default Permissions

Exploit availability: No

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to incorrect default permissions (e.g. 644) for /tmp/xauth-xxx-_y file that stores.X11 cookie. A local user can view contents of the file, obtain X11 cookies and consequently capture keystrokes of other users.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

KDE Frameworks: 5.2.0 - 5.22.0

CPE2.3

• cpe:2.3:a:kde_org:kde_frameworks:5.2.0:*:*:*:*:*:*:*
• cpe:2.3:a:kde_org:kde_frameworks:5.3.0:*:*:*:*:*:*:*
• cpe:2.3:a:kde_org:kde_frameworks:5.4.0:*:*:*:*:*:*:*

External links

https://lists.opensuse.org/opensuse-updates/2016-07/msg00001.html
https://www.kde.com/announcements/kde-frameworks-5.23.0.php
https://www.securityfocus.com/bid/91769
https://bugs.kde.org/show_bug.cgi?id=358593
https://bugs.kde.org/show_bug.cgi?id=363140
https://quickgit.kde.org/?p=kinit.git&a=commitdiff&h=72f3702dbe6cf15c06dc13da2c99c864e9022a58
https://quickgit.kde.org/?p=kinit.git&a=commitdiff&h=dece8fd89979cd1a86c03bcaceef6e9221e8d8cd
https://www.kde.org/info/security/advisory-20160621-1.txt

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.