tnef up to 1.4.17 Attachment ssh/authorized_keys out-of-bounds

Summaryinfo

A vulnerability was found in tnef up to 1.4.17. It has been classified as critical. This impacts an unknown function of the file ssh/authorized_keys of the component Attachment Handler. This manipulation causes out-of-bounds. This vulnerability is tracked as CVE-2019-18849. The attack is restricted to local execution. No exploit exists. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability classified as critical was found in tnef up to 1.4.17. Affected by this vulnerability is an unknown code block of the file ssh/authorized_keys of the component Attachment Handler. The manipulation with an unknown input leads to a out-of-bounds vulnerability. The CWE definition for the vulnerability is CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

In tnef before 1.4.18, an attacker may be able to write to the victim's .ssh/authorized_keys file via an e-mail message with a crafted winmail.dat application/ms-tnef attachment, because of a heap-based buffer over-read involving strdup.

The weakness was disclosed 11/11/2019. This vulnerability is known as CVE-2019-18849 since 11/11/2019. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. Technical details are known, but no exploit is available.

Upgrading to version 1.4.18 eliminates this vulnerability.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Name

• tnef

Version

• 1.4.0
• 1.4.1
• 1.4.2
• 1.4.3
• 1.4.4
• 1.4.5
• 1.4.6
• 1.4.7
• 1.4.8
• 1.4.9
• 1.4.10
• 1.4.11
• 1.4.12
• 1.4.13
• 1.4.14
• 1.4.15
• 1.4.16
• 1.4.17

CPE 2.3info

• 🔍
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CPE 2.2info

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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