SB2021052024 - Red Hat Enterprise Linux 8 update for python-cryptography 

CSH
CYBERSECURITY HELP
Sign In REGISTER

Main Vulnerability Database SB2021052024

SB2021052024 - Red Hat Enterprise Linux 8 update for python-cryptography

Published: May 20, 2021

Security Bulletin ID SB2021052024
Severity
High
Patch available
YES
Number of vulnerabilities 2
Exploitation vector Remote access
Highest impact Code execution

Breakdown by Severity

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

Description

This security bulletin contains information about 2 secuirty vulnerabilities.


1) Covert Timing Channel (CVE-ID: CVE-2020-25659)

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

python-cryptography 3.2 is vulnerable to Bleichenbacher timing attacks in the RSA decryption API, via timed processing of valid PKCS#1 v1.5 ciphertext.


2) Integer overflow (CVE-ID: CVE-2020-36242)

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to integer overflow when processing certain sequences of update calls to symmetrically encrypt multi-GB values. A remote attacker can pass specially crafted data to the application, trigger integer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.


Remediation

Install update from vendor's website.

References