#VU49938 Stack-based buffer overflow in gstreamer - CVE-2021-3185

Vulnerability identifier: #VU49938

Vulnerability risk: High

CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2021-3185

CWE-ID: CWE-121

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
gstreamer
Client/Desktop applications / Multimedia software

Vendor: GStreamer

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error when parsing a h264 header in the gstreamer h264 component. A remote attacker can send specially crafted data to the application, trigger stack-based buffer overflow and execute arbitrary code on the target system.

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

Mitigation
Install updates from vendor's website.

Vulnerable software versions

gstreamer: 1.0.0 - 1.18.0

---

External links
https://www.openwall.com/lists/oss-security/2021/01/20/1
https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/-/commit/11353b3f6e2f047cc37483d21e6a37ae558896bc
https://bugzilla.redhat.com/show_bug.cgi?id=1917192

---

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.