Privilege escalation in Linux kernel - CVE-2017-1000363

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Main Vulnerability Database Vulnerabilities #VU7243

Privilege escalation in Linux kernel - CVE-2017-1000363

Published: June 29, 2017 / Updated: July 3, 2017


Vulnerability identifier: #VU7243
CSH Severity: Low
CVSS v4: 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]
CVE-ID: CVE-2017-1000363
CWE-ID: CWE-264
Exploitation vector: Local access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a local attacker to gain elevated privileges on the target system.

The weakness exists due to an integer overflow in the lp_setup() function. a local attacker can append lp=none arguments to the kernel command line and gain root privileges on the target system.

Successful exploitation results in privilege escalation.

Affected software

Linux kernel
Ubuntu
linux (Ubuntu package)
linux-lts-xenial (Ubuntu package)
linux-aws (Ubuntu package)
linux-gke (Ubuntu package)
linux-snapdragon (Ubuntu package)

How to mitigate CVE-2017-1000363

Update to version 4.11.2.

linux (Ubuntu package) - addressed in versions 3.13.0-123.172, 4.4.0-83.106
linux-lts-xenial (Ubuntu package) - update to 4.4.0-83.106~14.04.1
linux-aws (Ubuntu package) - update to 4.4.0-1022.31
linux-gke (Ubuntu package) - update to 4.4.0-1018.18
linux-snapdragon (Ubuntu package) - update to 4.4.0-1063.68

External References

Related Security Bulletins