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F5 Networks: K33101555: Nettle cryptography library vulnerability CVE-2021-20305

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F5 Networks: K33101555: Nettle cryptography library vulnerability CVE-2021-20305

Severity
7
CVSS
(AV:N/AC:M/Au:N/C:P/I:P/A:P)
Published
04/05/2021
Created
02/19/2022
Added
02/18/2022
Modified
02/18/2022

Description

A flaw was found in Nettle in versions before 3.7.2, where several Nettle signature verification functions (GOST DSA, EDDSA & ECDSA) result in the Elliptic Curve Cryptography point (ECC) multiply function being called with out-of-range scalers, possibly resulting in incorrect results. This flaw allows an attacker to force an invalid signature, causing an assertion failure or possible validation. The highest threat to this vulnerability is to confidentiality, integrity, as well as system availability.

Solution(s)

  • f5-big-ip-upgrade-latest

References

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