CVE-2017-7482 Information

Description

In the Linux kernel before version 4.12 Kerberos 5 tickets decoded when using the RXRPC keys incorrectly assumes the size of a field. This could lead to the size-remaining variable wrapping and the data pointer going over the end of the buffer. This could possibly lead to memory corruption and possible privilege escalation.

CVSS Vector

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Reference

http://seclists.org/oss-sec/2017/q2/602 http://www.securityfocus.com/bid/99299 http://www.securitytracker.com/id/1038787 https://access.redhat.com/errata/RHSA-2019:0641 https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-7482 https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=5f2f97656ada8d811d3c1bef503ced266fcd53a0 https://www.debian.org/security/2017/dsa-3927 https://www.debian.org/security/2017/dsa-3945

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

7.8