#VU26335 NULL pointer dereference in gst-rtsp-server - CVE-2020-6095

Vulnerability identifier: #VU26335

Vulnerability risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-6095

CWE-ID: CWE-476

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
gst-rtsp-server
Server applications / Other server solutions

Vendor: GStreamer

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a NULL pointer dereference error in the GstRTSPAuth functionality in gst/rtsp-server/rtsp-auth.c. A remote attacker can send a specially crafted RTSP setup request and perform a denial of service (DoS) attack.

Mitigation
Install update from vendor's website.

Vulnerable software versions

gst-rtsp-server: 1.14.2 - 1.16.2

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External links
https://www.talosintelligence.com/vulnerability_reports/TALOS-2020-1018
https://github.com/GStreamer/gst-rtsp-server/blob/master/ChangeLog

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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.