CVE-2017-1000367: Race Condition
First published: Mon May 22 2017(Updated: )
A flaw was found in the way sudo read the device number of the tty from field 7 (tty_nr) from "/proc/[pid]/stat". A local attacker could use this flaw to escalate his privilege to root.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Sudo | <=1.8.20 |
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Reference Links
- http://lists.opensuse.org/opensuse-security-announce/2017-05/msg00077.html
- http://lists.opensuse.org/opensuse-security-announce/2017-05/msg00078.html
- http://lists.opensuse.org/opensuse-security-announce/2017-05/msg00079.html
- http://packetstormsecurity.com/files/142783/Sudo-get_process_ttyname-Race-Condition.html
- http://seclists.org/fulldisclosure/2017/Jun/3
- http://www.debian.org/security/2017/dsa-3867
- http://www.openwall.com/lists/oss-security/2017/05/30/16
- http://www.openwall.com/lists/oss-security/2022/12/22/5
- http://www.openwall.com/lists/oss-security/2022/12/22/6
- http://www.securityfocus.com/bid/98745
- http://www.securitytracker.com/id/1038582
- http://www.ubuntu.com/usn/USN-3304-1
- https://access.redhat.com/errata/RHSA-2017:1381
- https://access.redhat.com/errata/RHSA-2017:1382
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VXEXC4NNIG2QOZY6N2YUK246KI3D3UQO/
- https://security.gentoo.org/glsa/201705-15
- https://www.exploit-db.com/exploits/42183/
- https://www.sudo.ws/alerts/linux_tty.html
- https://bugzilla.redhat.com/show_bug.cgi/attachment.cgi?id=1282109&action=diff
- https://bugzilla.redhat.com/show_bug.cgi/attachment.cgi?id=1282109&action=edit
- https://bugzilla.redhat.com/show_bug.cgi/attachment.cgi?id=1282148
- https://bugzilla.redhat.com/show_bug.cgi/attachment.cgi?id=1282148&action=edit
- https://bugzilla.redhat.com/show_bug.cgi/attachment.cgi?id=1282158
- https://bugzilla.redhat.com/show_bug.cgi/attachment.cgi?id=1282158&action=edit
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1456884
- https://access.redhat.com/security/vulnerabilities/3059071
- http://seclists.org/oss-sec/2017/q2/358
- https://bugzilla.redhat.com/show_bug.cgi?id=1453074
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VXEXC4NNIG2QOZY6N2YUK246KI3D3UQO/
Frequently Asked Questions
What is the severity of CVE-2017-1000367?
CVE-2017-1000367 has a high severity rating due to the potential for local privilege escalation to root.
How do I fix CVE-2017-1000367?
To fix CVE-2017-1000367, upgrade to Sudo version 1.8.21 or later.
Who is affected by CVE-2017-1000367?
CVE-2017-1000367 affects systems running Sudo version 1.8.20 and earlier.
What is the attack vector for CVE-2017-1000367?
The attack vector for CVE-2017-1000367 is local, requiring an attacker to have access to the system.
What impact does CVE-2017-1000367 have on a system?
CVE-2017-1000367 can allow unprivileged users to escalate privileges to root, compromising the system's integrity.
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