SB2018082039 - Input validation error in Linux kernel kernel cpu
Published: August 20, 2018
Security Bulletin ID
SB2018082039
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Input validation error (CVE-ID: CVE-2018-15572)
CWE-ID: CWE-20 - Improper input validation
CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a local user to gain access to sensitive information.
The vulnerability exists due to improper input validation within the spectre_v2_parse_cmdline() and pr_info() functions in arch/x86/kernel/cpu/bugs.c. A local user can gain access to sensitive information.
Remediation
Install update from vendor's website.
References
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=fdf82a7856b32d905c39afc85e34364491e46346
- https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.18.1
- https://github.com/torvalds/linux/commit/fdf82a7856b32d905c39afc85e34364491e46346
- https://lists.debian.org/debian-lts-announce/2018/10/msg00003.html
- https://usn.ubuntu.com/3775-1/
- https://usn.ubuntu.com/3775-2/
- https://usn.ubuntu.com/3776-1/
- https://usn.ubuntu.com/3776-2/
- https://usn.ubuntu.com/3777-1/
- https://usn.ubuntu.com/3777-2/
- https://usn.ubuntu.com/3777-3/
- https://www.debian.org/security/2018/dsa-4308