Adobe Acrobat Reader toctou

Summaryinfo

A vulnerability was found in Adobe Acrobat Reader up to 20.005.30636/24.002.20965/24.002.20964/24.001.30123 and classified as critical. This affects an unknown function. The manipulation results in toctou. This vulnerability is identified as CVE-2024-39420. The attack can be executed remotely. There is not any exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, was found in Adobe Acrobat Reader up to 20.005.30636/24.002.20965/24.002.20964/24.001.30123. Affected is an unknown code. The manipulation with an unknown input leads to a toctou vulnerability. CWE is classifying the issue as CWE-367. The product 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 product to perform invalid actions when the resource is in an unexpected state. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

Acrobat Reader versions 20.005.30636, 24.002.20965, 24.002.20964, 24.001.30123 and earlier are affected by a Time-of-check Time-of-use (TOCTOU) Race Condition vulnerability that could result in arbitrary code execution in the context of the current user. This issue occurs when the state of a resource changes between its check-time and use-time, allowing an attacker to manipulate the resource. Exploitation of this issue requires user interaction in that a victim must open a malicious file.

The advisory is shared for download at helpx.adobe.com. This vulnerability is traded as CVE-2024-39420 since 06/24/2024. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 08/16/2024).

Upgrading eliminates this vulnerability.

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Productinfo

Type

• Document Reader Software

Vendor

• Adobe

Name

• Acrobat Reader

Version

• 20.005.30636
• 24.001.30123
• 24.002.20964
• 24.002.20965

License

• free

Website

• Vendor: https://www.adobe.com/

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