gnu gnutls CVE-2021-20232 vulnerability in GNU and Other Products
Published on March 12, 2021

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A flaw was found in gnutls. A use after free issue in client_send_params in lib/ext/pre_shared_key.c may lead to memory corruption and other potential consequences.

Vendor Advisory NVD

Vulnerability Analysis

CVE-2021-20232 is exploitable with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to be critical as this vulnerability has a high impact to the confidentiality, integrity and availability of this component.

Attack Vector:
NETWORK
Attack Complexity:
LOW
Privileges Required:
NONE
User Interaction:
NONE
Scope:
UNCHANGED
Confidentiality Impact:
HIGH
Integrity Impact:
HIGH
Availability Impact:
HIGH

Weakness Type

What is a Dangling pointer Vulnerability?

Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code.

CVE-2021-20232 has been classified to as a Dangling pointer vulnerability or weakness.


Products Associated with CVE-2021-20232

You can be notified by email with stack.watch whenever vulnerabilities like CVE-2021-20232 are published in these products:

Gnutls
 
Red Hat Enterprise Linux (RHEL)
 
Fedora Project Fedora
 

Exploit Probability

EPSS
0.84%
Percentile
74.45%

EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.