SB2016021605 - Red Hat update for kernel
Published: February 16, 2016
Security Bulletin ID
SB2016021605
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
2
Exploitation vector
Remote access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 2 vulnerabilities.
1) Privilege escalation (CVE-ID: CVE-2015-5157)
CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local attacker to gain elevated privileges on the target system.
The weakness exists in arch/x86/entry/entry_64.S on the x86_64 platform due to mishandling of IRET faults in processing NMIs that occurred during userspace execution. A local attacker can trigger NMI and bypass security restrictions.
2) Improper input validation (CVE-ID: CVE-2015-7872)
CWE-ID: CWE-20 - Improper input validation
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local attacker to cause DoS condition on the target system.
The weakness exists in the key_gc_unused_keys function in security/keys/gc.c due to improper input validation. A local attacker can submit specially crafted keyctl commands and cause the service to crash.
Remediation
Install update from vendor's website.