Summaryinfo

A vulnerability was found in systemd 242. It has been classified as problematic. Affected is an unknown function of the component VT1 Mode. The manipulation leads to credentials management (Password). This vulnerability is traded as CVE-2018-20839. It is possible to launch the attack remotely. There is no exploit available. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Detailsinfo

A vulnerability was found in systemd 242 and classified as problematic. This issue affects an unknown code of the component VT1 Mode. The manipulation with an unknown input leads to a credentials management vulnerability (Password). Using CWE to declare the problem leads to CWE-255. Impacted is confidentiality. The summary by CVE is:

systemd 242 changes the VT1 mode upon a logout, which allows attackers to read cleartext passwords in certain circumstances, such as watching a shutdown, or using Ctrl-Alt-F1 and Ctrl-Alt-F2. This occurs because the KDGKBMODE (aka current keyboard mode) check is mishandled.

The weakness was disclosed 05/17/2019 (Website). It is possible to read the advisory at securityfocus.com. The identification of this vulnerability is CVE-2018-20839 since 05/16/2019. The attack may be initiated remotely. A simple authentication is needed for exploitation. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1552 according to MITRE ATT&CK.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Name

• systemd

Version

• 242

License

• open-source

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