Adobe Acrobat Reader PDF Parser TOCTOU Race Condition v20-24.*
CVE-2024-39420 Published on August 14, 2024

Acrobat Reader | Time-of-check Time-of-use (TOCTOU) Race Condition (CWE-367)
Acrobat Reader versions 20.005.30636, 24.002.21005, 24.001.30159, 20.005.30655, 24.002.20965, 24.002.20964, 24.001.30123, 24.003.20054 and earlier are affected by a Time-of-check Time-of-use (TOCTOU) Race Condition vulnerability that could lead to arbitrary code execution. This vulnerability arises when the timing of actions changes the state of a resource between the checking of a condition and the use of the resource, allowing an attacker to manipulate the resource in a harmful way. Exploitation of this issue requires user interaction in that a victim must open a malicious file.

Vendor Advisory NVD

Vulnerability Analysis

CVE-2024-39420 is exploitable with local system access, requires user interaction. This vulnerability is consided to have a high level of attack complexity. The potential impact of an exploit of this vulnerability is considered to be very high.

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

Weakness Type

What is a TOCTTOU Vulnerability?

The software checks the state of a resource before using that resource, but the resource's state can change between the check and the use in a way that invalidates the results of the check. This can cause the software to perform invalid actions when the resource is in an unexpected state. This weakness can be security-relevant when an attacker can influence the state of the resource between check and use. This can happen with shared resources such as files, memory, or even variables in multithreaded programs.

CVE-2024-39420 has been classified to as a TOCTTOU vulnerability or weakness.


Products Associated with CVE-2024-39420

Want to know whenever a new CVE is published for Adobe Acrobat? stack.watch will email you.

Adobe Acrobat
 

Affected Versions

Adobe Acrobat Reader: adobe acrobat_dc: adobe acrobat_dc: adobe acrobat: adobe acrobat: adobe acrobat: adobe acrobat_reader: adobe acrobat_reader: adobe acrobat_reader_dc: adobe acrobat_reader_dc:

Exploit Probability

EPSS
1.15%
Percentile
78.35%

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.