gnu glibc CVE-2021-38604 vulnerability in GNU and Other Products
Published on August 12, 2021

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In librt in the GNU C Library (aka glibc) through 2.34, sysdeps/unix/sysv/linux/mq_notify.c mishandles certain NOTIFY_REMOVED data, leading to a NULL pointer dereference. NOTE: this vulnerability was introduced as a side effect of the CVE-2021-33574 fix.

Vendor Advisory Vendor Advisory NVD

Vulnerability Analysis

CVE-2021-38604 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 have no impact on confidentiality and integrity, and a high impact on availability.

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

Weakness Type

NULL Pointer Dereference

A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. NULL pointer dereference issues can occur through a number of flaws, including race conditions, and simple programming omissions.


Products Associated with CVE-2021-38604

You can be notified by email with stack.watch whenever vulnerabilities like CVE-2021-38604 are published in these products:

GNU Glibc
 
Fedora Project Fedora
 
Oracle Communications Cloud Native Core Network Function Cloud Native Environment
 
Oracle Communications Cloud Native Core Binding Support Function
 
Oracle Communications Cloud Native Core Network Repository Function
 
Oracle Communications Cloud Native Core Security Edge Protection Proxy
 
Oracle Enterprise Operations Monitor
 
Oracle Communications Cloud Native Core Unified Data Repository
 

Exploit Probability

EPSS
0.10%
Percentile
28.13%

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.