Permissions, Privileges, and Access Controls in Sudo

1) Permissions, Privileges, and Access Controls

EUVDB-ID: #VU32397

Risk: Low

CVSSv3.1: 7.3 [CVSS:3.1/CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2015-5602

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: No

Description

The vulnerability allows a local non-authenticated attacker to execute arbitrary code.

sudoedit in Sudo before 1.8.15 allows local users to gain privileges via a symlink attack on a file whose full path is defined using multiple wildcards in /etc/sudoers, as demonstrated by "/home/*/*/file.txt."

Mitigation

Install update from vendor's website.

Vulnerable software versions

Sudo: 1.8.0 - 1.8.14p3

External links

http://bugzilla.sudo.ws/show_bug.cgi?id=707
http://lists.fedoraproject.org/pipermail/package-announce/2015-November/171024.html
http://lists.fedoraproject.org/pipermail/package-announce/2015-November/171054.html
http://www.debian.org/security/2016/dsa-3440
http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html
http://www.securitytracker.com/id/1034392
http://www.sudo.ws/stable.html#1.8.15
http://security.gentoo.org/glsa/201606-13
http://www.exploit-db.com/exploits/37710/

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.