Multiple CRLF injection vulnerabilities in (1) chfn and (2) chsh in shadow 1:4.1.4 allow…
Priority LOW 33CWE-20Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · Partial · Partial
- Fix status
- No fix listed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA.
Summary
Multiple CRLF injection vulnerabilities in (1) chfn and (2) chsh in shadow 1:4.1.4 allow local users to add new users or groups to /etc/passwd via the GECOS field.
Why it matters now
EPSS 0.02309 83rd percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
Not affected: 2 products
- Red Hat Enterprise Linux 5
- Red Hat Enterprise Linux 6
Timeline
- 2026-10-02 Threatist record created from CVE-2011-0721
- 2026-10-03 Alias added: GHSA-6wqp-749m-jfw7
References
More Debian Shadow vulnerabilities
- TI-2005-04620 Improper input validation in Red Hat shadow CVSS 3.1HIGH 7.8
- TI-2017-14076 The Debian shadow package before 1:4.5-1 for Shadow incorrectly lists pts/0 and pts/1 as… CVSS 3.1HIGH 7.8
- TI-2008-05134 /bin/login in shadow 4.0.18.1 in Debian GNU/Linux, and probably other Linux… CVSS 2.0HIGH 7.2
- TI-2013-03706 shadow: TOCTOU (time-of-check time-of-use) race condition when copying and removing directory trees CVSS 3.1MEDIUM 4.7
- TI-2004-00907 Unknown vulnerability in the passwd_check function in Shadow 4.0.4.1, and possibly other… CVSS 2.0MEDIUM 4.6
- TI-2006-01138 useradd in shadow-utils before 4.0.3, and possibly other versions before 4.0.8, does not… CVSS 2.0LOW 3.7
Sources
- CVE-2011-0721 · CVE Program
- CVE-2011-0721 · NVD
- FIRST EPSS
- GHSA-6wqp-749m-jfw7 · GitHub Advisory Database · CC BY 4.0
- CVE-2011-0721 · Red Hat security data · CC BY 4.0
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