Branch p9 update bulletin.

Package gnutls30 updated to version 3.6.16-alt1 for branch p9 in task 273087.

Published: 2021-04-18

BDU:2021-02748

Уязвимость функций проверки подписи (ГОСТ DSA, EDDSA и ECDSA) библиотеки Nettle, связанная с недостатками используемых криптографических алгоритмов, позволяющая нарушителю, не прошедшему проверку подлинности, выполнить произвольный код

Severity: HIGH (8.1) Vector: AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

References:

CVE-2021-20305

Published: 2021-04-06
Modified: 2024-11-21

CVE-2021-20305

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.

Severity: HIGH (8.1) Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

References:

Version: 2.1.0

Branch p9 update on 2021-06-11

ALT-BU-2021-3967-1

ALT-PU-2021-1960-1

Closed vulnerabilities

BDU:2021-02748

CVE-2021-20305