Vulnerability identifier: #VU17462

Vulnerability risk: High

CVSSv3.1: 8.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2015-9262

CWE-ID: CWE-122

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
libXcursor
Universal components / Libraries / Libraries used by multiple products

Vendor: X.org

Description

The vulnerability allows a remote attacker to cause DoS condition or execute arbitrary code on the target system.

The vulnerability exists due to a boundary error in _XcursorThemeInherits in library.c. A remote attacker can trigger a one-byte heap overflow and cause the service to crash or execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation
Install update from vendor's website.

Vulnerable software versions

libXcursor: 1.1.5.2 - 1.1.14

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External links
http://access.redhat.com/errata/RHSA-2018:3059
http://access.redhat.com/errata/RHSA-2018:3505
http://bugs.freedesktop.org/show_bug.cgi?id=90857
http://cgit.freedesktop.org/xorg/lib/libXcursor/commit/?

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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.