CVE-2021-24042 is a vulnerability in WhatsApp
Published on January 4, 2022
The calling logic for WhatsApp for Android prior to v2.21.23, WhatsApp Business for Android prior to v2.21.23, WhatsApp for iOS prior to v2.21.230, WhatsApp Business for iOS prior to v2.21.230, WhatsApp for KaiOS prior to v2.2143, WhatsApp Desktop prior to v2.2146 could have allowed an out-of-bounds write if a user makes a 1:1 call to a malicious actor.
Vulnerability Analysis
CVE-2021-24042 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.
Weakness Types
Heap-based Buffer Overflow
A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().
What is a Memory Corruption Vulnerability?
The software writes data past the end, or before the beginning, of the intended buffer. Typically, this can result in corruption of data, a crash, or code execution. The software may modify an index or perform pointer arithmetic that references a memory location that is outside of the boundaries of the buffer. A subsequent write operation then produces undefined or unexpected results.
CVE-2021-24042 has been classified to as a Memory Corruption vulnerability or weakness.
Products Associated with CVE-2021-24042
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Affected Versions
Facebook WhatsApp Desktop:- Version unspecified and below v2.2146 is affected.
- Version v2.2146 and below unspecified is unaffected.
- Version unspecified and below v2.2143 is affected.
- Version v2.2143 and below unspecified is unaffected.
- Version unspecified and below v2.21.230 is affected.
- Version v2.21.230 and below unspecified is unaffected.
- Version unspecified and below v2.21.230 is affected.
- Version v2.21.230 and below unspecified is unaffected.
- Version unspecified and below v2.21.23 is affected.
- Version v2.21.23 and below unspecified is unaffected.
- Version unspecified and below v2.21.23 is affected.
- Version v2.21.23 and below unspecified is unaffected.
Exploit Probability
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.