Sudo CVE-2017-1000368 Incomplete Fix Local Privilege Escalation Vulnerability

by CIRT Team

Description:  Todd Miller’s sudo version 1.8.20p1 and earlier is vulnerable to an input validation (embedded newlines) in the get_process_ttyname() function resulting in information disclosure and command execution.

Impact: Local attackers could exploit this issue to run arbitrary commands with root privileges.

This issue is fixed in sudo 1.8.20p2.

NOTE: This issue is the result of an incomplete fix for the issue described in BID 98745 (Sudo ‘/src/ttyname.c’ Local Privilege Escalation Vulnerability).

Mitigation: Updates are available. Please check specific vendor advisory for more information.

Reference URL’s:

• http://www.securityfocus.com/bid/98838/info
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-1000368
• https://www.sudo.ws/alerts/linux_tty.html

CIRT Team

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