#VU22620 Input validation error in python-ecdsa - CVE-2019-14859

Vulnerability identifier: #VU22620

Vulnerability risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2019-14859

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
python-ecdsa
Universal components / Libraries / Software for developers

Vendor: Brian Warner

Description

The vulnerability allows a remote attacker to bypass certain security restrictions.

The vulnerability exists due to signature malleability while processing DER-encoded data. A remote attacker can bypass certain security restrictions.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

python-ecdsa: 0.5 - 0.13.2

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External links
https://github.com/warner/python-ecdsa/releases/tag/python-ecdsa-0.13.3

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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.