Vulnerability identifier: #VU45435

Vulnerability risk: Medium

CVSSv3.1: 5.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2011-0010

CWE-ID: CWE-264

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Sudo
Client/Desktop applications / Software for system administration

Vendor: Sudo

Description

The vulnerability allows a remote non-authenticated attacker to read and manipulate data.

check.c in sudo 1.7.x before 1.7.4p5, when a Runas group is configured, does not require a password for command execution that involves a gid change but no uid change, which allows local users to bypass an intended authentication requirement via the -g option to a sudo command.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Sudo: 1.7.0 - 1.7.4p4

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External links
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=609641
http://lists.fedoraproject.org/pipermail/package-announce/2011-January/053263.html
http://lists.fedoraproject.org/pipermail/package-announce/2011-January/053341.html
http://lists.opensuse.org/opensuse-security-announce/2011-01/msg00006.html
http://openwall.com/lists/oss-security/2011/01/11/3
http://openwall.com/lists/oss-security/2011/01/12/1
http://openwall.com/lists/oss-security/2011/01/12/3
http://secunia.com/advisories/42886
http://secunia.com/advisories/42949
http://secunia.com/advisories/42968
http://secunia.com/advisories/43068
http://secunia.com/advisories/43282
http://security.gentoo.org/glsa/glsa-201203-06.xml
http://slackware.com/security/viewer.php?l=slackware-security&y=2011&m=slackware-security.593654
http://www.mandriva.com/security/advisories?name=MDVSA-2011:018
http://www.osvdb.org/70400
http://www.redhat.com/support/errata/RHSA-2011-0599.html
http://www.securityfocus.com/bid/45774
http://www.sudo.ws/repos/sudo/rev/07d1b0ce530e
http://www.sudo.ws/repos/sudo/rev/fe8a94f96542
http://www.sudo.ws/sudo/alerts/runas_group_pw.html
http://www.ubuntu.com/usn/USN-1046-1
http://www.vupen.com/english/advisories/2011/0089
http://www.vupen.com/english/advisories/2011/0182
http://www.vupen.com/english/advisories/2011/0195
http://www.vupen.com/english/advisories/2011/0199
http://www.vupen.com/english/advisories/2011/0212
http://www.vupen.com/english/advisories/2011/0362
http://bugzilla.redhat.com/show_bug.cgi?id=668879
http://exchange.xforce.ibmcloud.com/vulnerabilities/64636

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

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