Linux Kernel up to 6.11.7 tpm_pm_suspend random values

Summaryinfo

A vulnerability marked as problematic has been reported in Linux Kernel up to 6.11.7. The impacted element is the function tpm_pm_suspend. Performing a manipulation results in random values. This vulnerability was named CVE-2024-53085. There is no available exploit. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, was found in Linux Kernel up to 6.11.7. This affects the function tpm_pm_suspend. The manipulation with an unknown input leads to a random values vulnerability. CWE is classifying the issue as CWE-330. The product uses insufficiently random numbers or values in a security context that depends on unpredictable numbers. This is going to have an impact on confidentiality. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: tpm: Lock TPM chip in tpm_pm_suspend() first Setting TPM_CHIP_FLAG_SUSPENDED in the end of tpm_pm_suspend() can be racy according, as this leaves window for tpm_hwrng_read() to be called while the operation is in progress. The recent bug report gives also evidence of this behaviour. Aadress this by locking the TPM chip before checking any chip->flags both in tpm_pm_suspend() and tpm_hwrng_read(). Move TPM_CHIP_FLAG_SUSPENDED check inside tpm_get_random() so that it will be always checked only when the lock is reserved.

It is possible to read the advisory at git.kernel.org. This vulnerability is uniquely identified as CVE-2024-53085 since 11/19/2024. The exploitability is told to be difficult. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1600.001 according to MITRE ATT&CK.

The vulnerability scanner Nessus provides a plugin with the ID 213130 (SUSE SLES12 Security Update : kernel (SUSE-SU-2024:4367-1)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.11.8 eliminates this vulnerability. Applying the patch bc203fe416ab/9265fed6db60 is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at Tenable (213130) and CERT Bund (WID-SEC-2024-3509). Be aware that VulDB is the high quality source for vulnerability data.

Affected

• Google Container-Optimized OS
• Debian Linux
• Amazon Linux 2
• Red Hat Enterprise Linux
• Ubuntu Linux
• SUSE Linux
• Oracle Linux
• RESF Rocky Linux
• Dell NetWorker
• Open Source Linux Kernel
• Dell Avamar
• IBM QRadar SIEM
• IBM DataPower Gateway
• Dell PowerProtect Data Domain

Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 6.11.0
• 6.11.1
• 6.11.2
• 6.11.3
• 6.11.4
• 6.11.5
• 6.11.6
• 6.11.7

License

• open-source

Website

• Vendor: https://www.kernel.org/

CPE 2.3info

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Be aware that VulDB is the high quality source for vulnerability data.

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