#VU28397 Information disclosure in Linux kernel
Vulnerability identifier: #VU28397
Vulnerability risk: Low
CVSSv3.1: 4.9 [CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N/E:U/RL:O/RC:C]
CVE-ID:
CWE-ID:
CWE-200
Exploitation vector: Local
Exploit availability: No
Vulnerable software:
Linux kernel
Operating systems & Components /
Operating system
Vendor: Linux Foundation
Description
The vulnerability allows a local authenticated user to gain access to sensitive information.
Microarchitectural Store Buffer Data Sampling (MSBDS): Store buffers on some microprocessors utilizing speculative execution may allow an authenticated user to potentially enable information disclosure via a side channel with local access. A list of impacted products can be found here: https://www.intel.com/content/dam/www/public/us/en/documents/corporate-information/SA00233-microcode-update-guidance_05132019.pdf
Mitigation
Install update from vendor's website.
Vulnerable software versions
Linux kernel: 4.14 - 4.14.118, 4.19 - 4.19.42, 4.9 - 4.9.175, 4.4 - 4.4.179, 5.0 - 5.0.21, 5.1 - 5.1.21
External links
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.119
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.43
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.176
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.4.180
http://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.2
Q & A
Can this vulnerability be exploited remotely?
No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
