Vulnerability Monitor

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CVE-2005-4890

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.

Security Impact Summary

This vulnerability carries a HIGH severity rating with a CVSS v3.1 score of 7.8, requiring local system access to exploit with relatively low complexity without requiring user interaction requiring only low-level privileges . The vulnerability impacts confidentiality (data exposure), integrity (unauthorized modifications), and availability (service disruption) for affected systems. Impacting 4 products from debian, from sudo_project, from debian and 1 other, organizations running these solutions should prioritize assessment and patching.

Historical Context

First disclosed in 2019, this vulnerability was reported during a period defined by widespread IoT adoption challenges, mobile security concerns, and the emergence of advanced persistent threat (APT) techniques. Contemporary mitigation strategies focused on secure development practices and third-party component vetting.

Published

2019-11-04T19:15:10.130

Last Modified

2024-11-21T00:05:25.703

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 7.8 (HIGH)

CVSSv2 Vector

AV:L/AC:L/Au:N/C:C/I:C/A:C

Access Vector: LOCAL
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: COMPLETE
Integrity Impact: COMPLETE
Availability Impact: COMPLETE

Exploitability Score

3.9

Impact Score

10.0

Weaknesses

Type: Primary
CWE-20

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	debian	shadow	≤ 4.1.5	Yes
Application	sudo_project	sudo	≤ 1.7.4	Yes
Operating System	debian	debian_linux	8.0	Yes
Operating System	debian	debian_linux	9.0	Yes
Operating System	debian	debian_linux	10.0	Yes
Operating System	redhat	enterprise_linux	4	Yes
Operating System	redhat	enterprise_linux	5	Yes
Operating System	redhat	enterprise_linux	6.0	Yes

References

http://www.openwall.com/lists/oss-security/2012/11/06/8 Mailing List, Third Party Advisory ([email protected])
http://www.openwall.com/lists/oss-security/2013/05/20/3 Mailing List, Third Party Advisory ([email protected])
http://www.openwall.com/lists/oss-security/2013/11/28/10 Mailing List, Third Party Advisory ([email protected])
http://www.openwall.com/lists/oss-security/2013/11/29/5 Mailing List, Third Party Advisory ([email protected])
http://www.openwall.com/lists/oss-security/2014/10/20/9 Mailing List, Third Party Advisory ([email protected])
http://www.openwall.com/lists/oss-security/2014/10/21/1 Mailing List, Third Party Advisory ([email protected])
http://www.openwall.com/lists/oss-security/2014/12/15/5 Mailing List, Third Party Advisory ([email protected])
http://www.openwall.com/lists/oss-security/2016/02/25/6 Exploit, Mailing List, Third Party Advisory ([email protected])
https://access.redhat.com/security/cve/cve-2005-4890 Third Party Advisory ([email protected])
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2005-4890 Issue Tracking, Third Party Advisory ([email protected])
https://security-tracker.debian.org/tracker/CVE-2005-4890 Third Party Advisory ([email protected])
http://www.openwall.com/lists/oss-security/2012/11/06/8 Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.openwall.com/lists/oss-security/2013/05/20/3 Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.openwall.com/lists/oss-security/2013/11/28/10 Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.openwall.com/lists/oss-security/2013/11/29/5 Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.openwall.com/lists/oss-security/2014/10/20/9 Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.openwall.com/lists/oss-security/2014/10/21/1 Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.openwall.com/lists/oss-security/2014/12/15/5 Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.openwall.com/lists/oss-security/2016/02/25/6 Exploit, Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://access.redhat.com/security/cve/cve-2005-4890 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2005-4890 Issue Tracking, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://security-tracker.debian.org/tracker/CVE-2005-4890 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For debian's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.