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Out-of-bounds Write Affecting nettle package, versions <0:3.4.1-4.el8_3

0.0
high

Snyk CVSS

    Attack Complexity High
    Confidentiality High
    Integrity High
    Availability High

    Threat Intelligence

    EPSS 0.96% (84th percentile)
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NVD
8.1 high
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SUSE
8.1 high
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Red Hat
8.1 high

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  • Snyk ID SNYK-CENTOS8-NETTLE-2093149
  • published 26 Jul 2021
  • disclosed 16 Mar 2021
Report a new vulnerability Found a mistake?

Introduced: 16 Mar 2021

CVE-2021-20305 Open this link in a new tab
CWE-787 Open this link in a new tab

How to fix?

Upgrade Centos:8 nettle to version 0:3.4.1-4.el8_3 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream nettle package and not the nettle package as distributed by Centos. See How to fix? for Centos:8 relevant fixed versions and status.

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.