CVE-2005-4890

Name: CVE-2005-4890
Creator: NVD / NIST
Published: 2019-11-04T19:15:10.13+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 0.64%

Last modified Jun 16, 2026

CVE-2005-4890 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. There is a possible tty hijacking in shadow 4.x before 4.1.5 and sudo 1.x before 1.7.4 via "su - user -c program". The user session can be escaped to the parent session by using the TIOCSTI ioctl to push characters into the input buffer to be read by the next process.. EPSS estimates a 0.64% chance of exploitation in the next 30 days.

Description

There is a possible tty hijacking in shadow 4.x before 4.1.5 and sudo 1.x before 1.7.4 via "su - user -c program". The user session can be escaped to the parent session by using the TIOCSTI ioctl to push characters into the input buffer to be read by the next process.

Metrics

CVSS 3.1

7.8/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

0.64%

45.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-20

Affected Software

Vendor	Product	Versions
Debian	Shadow	>= 4.0.0, <= 4.1.5
Sudo Project	Sudo	>= 1.3.0, <= 1.7.4
Debian	Debian Linux	8.0
Debian	Debian Linux	9.0
Debian	Debian Linux	10.0
Redhat	Enterprise Linux	4
Redhat	Enterprise Linux	5
Redhat	Enterprise Linux	6.0

References

http://www.openwall.com/lists/oss-security/2012/11/06/8Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2013/05/20/3Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2013/11/28/10Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2013/11/29/5Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2014/10/20/9Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2014/10/21/1Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2014/12/15/5Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2016/02/25/6Exploit, Mailing List, Third Party Advisory
https://access.redhat.com/security/cve/cve-2005-4890Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2005-4890Issue Tracking, Third Party Advisory
https://security-tracker.debian.org/tracker/CVE-2005-4890Third Party Advisory
http://www.openwall.com/lists/oss-security/2012/11/06/8Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2013/05/20/3Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2013/11/28/10Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2013/11/29/5Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2014/10/20/9Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2014/10/21/1Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2014/12/15/5Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2016/02/25/6Exploit, Mailing List, Third Party Advisory
https://access.redhat.com/security/cve/cve-2005-4890Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2005-4890Issue Tracking, Third Party Advisory
https://security-tracker.debian.org/tracker/CVE-2005-4890Third Party Advisory

Timeline

Published: Nov 4, 2019
Last Modified: Jun 16, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2005-4890?

How severe is CVE-2005-4890?

CVE-2005-4890 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.64% probability of exploitation in the next 30 days.

How do I fix CVE-2005-4890?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2005-4890?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST