The telnet daemon (telnetd) in MIT krb5 before 1.6.1 allows remote attackers to bypass…
Priority HIGH 66CWE-306Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- Complete · Complete · Complete
- Fix status
- Fixed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-306.
Summary
The telnet daemon (telnetd) in MIT krb5 before 1.6.1 allows remote attackers to bypass authentication and gain system access via a username beginning with a '-' character, a similar issue to CVE-2007-0882.
Why it matters now
EPSS 0.30186 98th percentileScored 2026-11-07
Fix Fixed Red Hat: 1 advisory
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
CPE configurations NVD · 6
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:mit:kerberos_5:*:*:*:*:*:*:*:* | before 1.6.1 | Vulnerable | moos-ivp |
| cpe:2.3:o:debian:debian_linux:3.1:*:*:*:*:*:*:* | 3.1 | Vulnerable | Debian |
| cpe:2.3:o:debian:debian_linux:4.0:*:*:*:*:*:*:* | 4.0 | Vulnerable | Debian |
| cpe:2.3:o:canonical:ubuntu_linux:5.10:*:*:*:*:*:*:* | 5.10 | Vulnerable | Canonical |
| cpe:2.3:o:canonical:ubuntu_linux:6.06:*:*:*:*:*:*:* | 6.06 | Vulnerable | Canonical |
| cpe:2.3:o:canonical:ubuntu_linux:6.10:*:*:*:*:*:*:* | 6.10 | Vulnerable | Canonical |
- cpe:2.3:a:mit:kerberos_5:*:*:*:*:*:*:*:* Versions before 1.6.1 Vulnerable ·moos-ivp
- cpe:2.3:o:debian:debian_linux:3.1:*:*:*:*:*:*:* Versions 3.1 Vulnerable ·Debian
- cpe:2.3:o:debian:debian_linux:4.0:*:*:*:*:*:*:* Versions 4.0 Vulnerable ·Debian
- cpe:2.3:o:canonical:ubuntu_linux:5.10:*:*:*:*:*:*:* Versions 5.10 Vulnerable ·Canonical
- cpe:2.3:o:canonical:ubuntu_linux:6.06:*:*:*:*:*:*:* Versions 6.06 Vulnerable ·Canonical
- cpe:2.3:o:canonical:ubuntu_linux:6.10:*:*:*:*:*:*:* Versions 6.10 Vulnerable ·Canonical
Remediation
Red Hat 1 advisory
- RHSA-2007:0095 Released 2007-04-03 · Red Hat rating Criticalkrb5 security update
- Red Hat Desktop version 3 krb5-1.2.7-61, krb5-devel-1.2.7-61, krb5-devel-1.2.7-61.i386 +6
- Red Hat Enterprise Linux (v. 5 server) krb5-1.5-23, krb5-devel-1.5-23, krb5-devel-1.5-23.i386 +14
- Red Hat Enterprise Linux AS (Advanced Server) version 2.1 krb5-1.2.2-44, krb5-devel-1.2.2-44.i386, krb5-devel-1.2.2-44.ia64 +6
- Red Hat Enterprise Linux AS version 3 krb5-1.2.7-61, krb5-devel-1.2.7-61, krb5-devel-1.2.7-61.i386 +14
- Red Hat Enterprise Linux AS version 4 krb5-1.3.4-46, krb5-devel-1.3.4-46, krb5-devel-1.3.4-46.i386 +14
- Red Hat Enterprise Linux Desktop (v. 5 client) krb5-1.5-23, krb5-libs-1.5-23, krb5-libs-1.5-23.i386 +2
- Red Hat Enterprise Linux Desktop Workstation (v. 5 client) krb5-1.5-23, krb5-devel-1.5-23, krb5-devel-1.5-23.i386 +2
- Red Hat Enterprise Linux Desktop version 4 krb5-1.3.4-46, krb5-devel-1.3.4-46, krb5-devel-1.3.4-46.i386 +6
- Red Hat Enterprise Linux ES version 2.1 krb5-1.2.2-44, krb5-devel-1.2.2-44.i386, krb5-libs-1.2.2-44.i386 +2
- Red Hat Enterprise Linux ES version 3 krb5-1.2.7-61, krb5-devel-1.2.7-61, krb5-devel-1.2.7-61.i386 +10
- Red Hat Enterprise Linux ES version 4 krb5-1.3.4-46, krb5-devel-1.3.4-46, krb5-devel-1.3.4-46.i386 +10
- Red Hat Enterprise Linux WS version 2.1 krb5-1.2.2-44, krb5-devel-1.2.2-44.i386, krb5-libs-1.2.2-44.i386 +2
- Red Hat Enterprise Linux WS version 3 krb5-1.2.7-61, krb5-devel-1.2.7-61, krb5-devel-1.2.7-61.i386 +10
- Red Hat Enterprise Linux WS version 4 krb5-1.3.4-46, krb5-devel-1.3.4-46, krb5-devel-1.3.4-46.i386 +10
- Red Hat Linux Advanced Workstation 2.1 krb5-1.2.2-44, krb5-devel-1.2.2-44.ia64, krb5-libs-1.2.2-44.ia64 +2
Vendor assessments
Red Hat
Red Hat rating: Critical. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Desktop version 3 | Fixed | RHSA-2007:0095 |
| Red Hat Enterprise Linux (v. 5 server) | Fixed | RHSA-2007:0095 |
| Red Hat Enterprise Linux AS (Advanced Server) version 2.1 | Fixed | RHSA-2007:0095 |
| Red Hat Enterprise Linux AS version 3 | Fixed | RHSA-2007:0095 |
| Red Hat Enterprise Linux AS version 4 | Fixed | RHSA-2007:0095 |
| Red Hat Enterprise Linux Desktop (v. 5 client) | Fixed | RHSA-2007:0095 |
| Red Hat Enterprise Linux Desktop Workstation (v. 5 client) | Fixed | RHSA-2007:0095 |
| Red Hat Enterprise Linux Desktop version 4 | Fixed | RHSA-2007:0095 |
| Red Hat Enterprise Linux ES version 2.1 | Fixed | RHSA-2007:0095 |
| Red Hat Enterprise Linux ES version 3 | Fixed | RHSA-2007:0095 |
| Red Hat Enterprise Linux ES version 4 | Fixed | RHSA-2007:0095 |
| Red Hat Enterprise Linux WS version 2.1 | Fixed | RHSA-2007:0095 |
| Red Hat Enterprise Linux WS version 3 | Fixed | RHSA-2007:0095 |
| Red Hat Enterprise Linux WS version 4 | Fixed | RHSA-2007:0095 |
| Red Hat Linux Advanced Workstation 2.1 | Fixed | RHSA-2007:0095 |
Timeline
- 2026-10-02 Threatist record created from CVE-2007-0956
- 2026-10-03 Alias added: GHSA-gcgf-6qp7-hmmv
References
Sources
- CVE-2007-0956 · CVE Program
- CVE-2007-0956 · NVD
- FIRST EPSS
- GHSA-gcgf-6qp7-hmmv · GitHub Advisory Database · CC BY 4.0
- CVE-2007-0956 · Red Hat security data · CC BY 4.0
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