SB2020042389 - Fedora 32 update for openssl

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Main Vulnerability Database SB2020042389

SB2020042389 - Fedora 32 update for openssl

Published: April 23, 2020 Updated: April 25, 2025

Security Bulletin ID SB2020042389
Severity
Medium
Patch available
YES
Number of vulnerabilities 2
Exploitation vector Remote access
Highest impact Denial of service

Breakdown by Severity

Medium 50% Low 50%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 2 secuirty vulnerabilities.


1) Cryptographic issues (CVE-ID: CVE-2019-1551)

The vulnerability allows a remote attacker to gain access to sensitive information.

The vulnerability exists due to an overflow issue within the rsaz_512_sqr(): the x64_64 Montgomery squaring procedure used in exponentiation with 512-bit moduli. A remote attacker can perform an attack against DH512 keys.


2) NULL pointer dereference (CVE-ID: CVE-2020-1967)

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a NULL pointer dereference error within the SSL_check_chain() function during or after a TLS 1.3 handshake. A remote attacker can send an invalid or unrecognised signature algorithm and perform a denial of service (DoS) attack.


Remediation

Install update from vendor's website.

References