#VU29196 Cryptographic issues in elliptic - CVE-2020-13822

Vulnerability identifier: #VU29196

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-2020-13822

CWE-ID: CWE-310

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
elliptic
Web applications / JS libraries

Vendor: indutny

Description

The vulnerability allows a remote attacker to comrpomise the target system.

The vulnerability exists due to the affected software allows ECDSA signature malleability via variations in encoding, leading "\0" bytes, or integer overflows. A remote attacker can cause a security-relevant impact if an application relied on a single canonical signature.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

elliptic: 6.5.2

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External links
https://github.com/indutny/elliptic/issues/226
https://medium.com/@herman_10687/malleability-attack-why-it-matters-7b5f59fb99a4
https://www.npmjs.com/package/elliptic
https://yondon.blog/2019/01/01/how-not-to-use-ecdsa/
https://www.npmjs.com/advisories/1547

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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.