#VU40591 Permissions, Privileges, and Access Controls in Fedora - CVE-2015-7496

Vulnerability identifier: #VU40591

Vulnerability risk: High

CVSSv4.0: 6.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2015-7496

CWE-ID: CWE-264

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Fedora
Operating systems & Components / Operating system

Vendor: Fedoraproject

Description

The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.

GNOME Display Manager (gdm) before 3.18.2 allows physically proximate attackers to bypass the lock screen by holding the Escape key.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Fedora: 23

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External links
https://lists.fedoraproject.org/pipermail/package-announce/2015-November/172328.html
https://www.openwall.com/lists/oss-security/2015/11/17/10
https://www.openwall.com/lists/oss-security/2015/11/17/8
https://access.redhat.com/errata/RHSA-2017:2128
https://bugzilla.gnome.org/show_bug.cgi?id=758032
https://download.gnome.org/sources/gdm/3.18/gdm-3.18.2.news

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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.