CVE-2021-20305: nettle before 3.7.2 (exclusive), nettle 3.7.2; +8 more affected products

Affected technology

nettle · before 3.7.2 (exclusive)
nettle project

fedora · 33
fedoraproject

enterprise linux · 7.0
redhat

enterprise linux · 8.0
redhat

active iq unified manager · Version not applicable in the source CPE
netapp

ontap select deploy administration utility · Version not applicable in the source CPE
netapp

debian linux · 9.0
debian

debian linux · 10.0
debian

nettle · nettle 3.7.2
Vendor not specified by the source

SIMATIC S7-1500 CPU 1518-4 PN/DP MFP · V3.1.0 to before V3.1.5
Siemens

SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP · V3.1.0 to before V3.1.5
Siemens

SIPLUS S7-1500 CPU 1518-4 PN/DP MFP · V3.1.0 to before V3.1.5
Siemens

Description’s affected range: versions before 3.7.2, where several Nettle signature verification functions (GOST DSA, EDDSA & ECDSA) result in the Elliptic Curve Cryptography point (ECC) multiply func

Component: Not specified by the source
Function: being

Attack conditions (NVD, CVSS 3.1): Network (remote) · No privileges required · No user interaction required

What an attacker can do

An attacker can force an invalid signature, causing an assertion failure or possible validation. NVD’s CVSS 3.1 assessment (base score 8.1/10) rates confidentiality, integrity and availability impact as high.