Vulnerability identifier: #VU29196

Vulnerability risk: High

CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-13822

CWE-ID: CWE-310

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
elliptic
Other software / Other software solutions

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