Vulnerability identifier: #VU76723

Vulnerability risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-26243

CWE-ID: CWE-401

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Nanopb
Web applications / JS libraries

Vendor: Nanopb Project

Description
The vulnerability allows a remote attacker to perform DoS attack on the target system.

The vulnerability exists due memory leak. A remote attacker can force the application to leak memory and perform denial of service attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Nanopb: 0.4.0 - 0.4.3, 0.3.6 - 0.3.9.6

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External links
http://github.com/nanopb/nanopb/blob/2b48a361786dfb1f63d229840217a93aae064667/CHANGELOG.txt
http://github.com/nanopb/nanopb/commit/4fe23595732b6f1254cfc11a9b8d6da900b55b0c
http://github.com/nanopb/nanopb/issues/615
http://github.com/nanopb/nanopb/security/advisories/GHSA-85rr-4rh9-hhwh

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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.