#VU95686 Use of insufficiently random values in Linux kernel - CVE-2020-16166
Vulnerability identifier: #VU95686
Vulnerability risk: Low
CVSSv4.0: 1.7 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]
CVE-ID:
CWE-ID:
CWE-330
Exploitation vector: Network
Exploit availability: No
Vulnerable software:
Linux kernel
Operating systems & Components /
Operating system
Vendor: Linux Foundation
Description
The vulnerability allows a remote non-authenticated attacker to gain access to sensitive information.
The vulnerability exists due to use of insufficiently random values error within the prandom_state_selftest() function in lib/random32.c, within the update_process_times() function in kernel/time/timer.c, within the add_interrupt_randomness() function in drivers/char/random.c. A remote non-authenticated attacker can gain access to sensitive information.
Mitigation
Install update from vendor's repository.
Vulnerable software versions
Linux kernel: All versions
External links
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=f227e3ec3b5cad859ad15666874405e8c1bbc1d4
https://github.com/torvalds/linux/commit/f227e3ec3b5cad859ad15666874405e8c1bbc1d4
https://lists.opensuse.org/opensuse-security-announce/2020-08/msg00009.html
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MFBCLQWJI5I4G25TVJNLXLAXJ4MERQNW/
https://security.netapp.com/advisory/ntap-20200814-0004/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/AAPTLPAEKVAJYJ4LHN7VH4CN2W75R2YW/
https://lists.opensuse.org/opensuse-security-announce/2020-08/msg00047.html
https://usn.ubuntu.com/4526-1/
https://usn.ubuntu.com/4525-1/
https://lists.debian.org/debian-lts-announce/2020/09/msg00025.html
https://lists.debian.org/debian-lts-announce/2020/10/msg00034.html
https://lists.debian.org/debian-lts-announce/2020/10/msg00032.html
https://arxiv.org/pdf/2012.07432.pdf
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c51f8f88d705e06bd696d7510aff22b33eb8e638
https://www.oracle.com/security-alerts/cpuApr2021.html
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
