Advisories ยป MGASA-2021-0300

Updated nettle packages fix security vulnerabilities

Publication date: 29 Jun 2021
Type: security
Affected Mageia releases : 7 , 8
CVE: CVE-2021-3580 , CVE-2021-20305


Remote crash in RSA decryption via manipulated ciphertext (CVE-2021-3580).

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 (CVE-2021-20305).

The Mageia 8 nettle package has been updated to version 3.7.3 and the Mageia 7
nettle package has been patched to fix these issues.