CVE-2005-4890: Red Hat shadow vulnerability

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 pr...

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.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 8, 2024, 00:01 UTC (UTC+00:00)

Security readout for executives and security teams

This is an old local terminal-control weakness affecting shadow and sudo versions listed in the source bundle. A user running through a specific su command pattern could potentially influence the parent terminal session. It is not a remote internet-facing bug by itself, and the provided sources do not show active exploitation. Exposure is most likely on legacy Unix/Linux systems with affected shadow or sudo versions and operational use of su - user -c program on an interactive tty. Modern supported distributions may have vendor backports, so package version alone should be checked against distribution advisories. Treat this as a legacy local-privilege workflow risk. It should not outrank actively exploited remote issues, but it deserves cleanup during Linux baseline hardening, especially on shared administration servers, bastion hosts, and unsupported systems. Mitigation focus: Check vendor advisories for your distribution and package branch.; Upgrade shadow to 4.1.5 or later where applicable.; Upgrade sudo to 1.7.4 or later where applicable..

Prepared: Jun 6, 2026, 12:31 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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CVE-2005-4890 mapping review

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Nov 4, 2019, 18:38 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors

0Timeline events

0ADP providers

4Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

CVE List V5 sourceCVE List V5
https://security-tracker.debian.org/tracker/CVE-2005-4890CVE reference · x_refsource_MISC
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2005-4890CVE reference · x_refsource_MISC
https://access.redhat.com/security/cve/cve-2005-4890CVE reference · x_refsource_MISC

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

Red Hatshadow4.x before 4.1.5Listed

Red Hatsudo1.x before 1.7.4Listed

Weakness

CWE details

No CWE listed

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