SB2017061922 - Security restrictions bypass in Linux Kernel
Published: June 19, 2017
Security Bulletin ID
SB2017061922
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
3
Exploitation vector
Local access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 3 vulnerabilities.
1) Security restrictions bypass (CVE-ID: CVE-2017-1000370)
CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls
CVSSv4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a local attacker to bypass security restrictions on the target system.
The weakness exists due to a flaw in offset2lib patch. A local attacker can send a specially-crafted request, bypass security restrictions and gain full access to the system.
2) Security restrictions bypass (CVE-ID: CVE-2017-1000371)
CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls
CVSSv4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a local attacker to bypass security restrictions on the target system.
The weakness exists due to a flaw in offset2lib patch. A local attacker can send a specially-crafted request, bypass security restrictions and gain full access to the system.
3) Security restrictions bypass (CVE-ID: CVE-2017-7482)
CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls
CVSSv4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N]
The vulnerability allows a local attacker to bypass security restrictions on the target system.
The weakness exists due to the failure to take the argument and environment strings passed through RLIMIT_STACK/RLIM_INFINITY (1/4 of the size) into account when imposing a size restriction. A local attacker can bypass security limitation and perform unauthorized actions.
Successful exploitation of the vulnerability results in access to the system.
Remediation
Install update from vendor's website.