Double free vulnerability in the prepare_error_as function in do_as_req.c in the Key…
Priority MEDIUM 44CWE-399Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- High
- Impact type
- Code execution
- 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-399 and the CVSS impact.
Summary
Double free vulnerability in the prepare_error_as function in do_as_req.c in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) 1.7 through 1.9, when the PKINIT feature is enabled, allows remote attackers to cause a denial of service (daemon crash) or possibly execute arbitrary code via an e_data field containing typed data.
Why it matters now
EPSS 0.08267 94th 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 · 7
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:mit:kerberos_5:1.7:*:*:*:*:*:*:* | 1.7 | Vulnerable | moos-ivp |
| cpe:2.3:a:mit:kerberos_5:1.7.1:*:*:*:*:*:*:* | 1.7.1 | Vulnerable | moos-ivp |
| cpe:2.3:a:mit:kerberos_5:1.8:*:*:*:*:*:*:* | 1.8 | Vulnerable | moos-ivp |
| cpe:2.3:a:mit:kerberos_5:1.8.1:*:*:*:*:*:*:* | 1.8.1 | Vulnerable | moos-ivp |
| cpe:2.3:a:mit:kerberos_5:1.8.2:*:*:*:*:*:*:* | 1.8.2 | Vulnerable | moos-ivp |
| cpe:2.3:a:mit:kerberos_5:1.8.3:*:*:*:*:*:*:* | 1.8.3 | Vulnerable | moos-ivp |
| cpe:2.3:a:mit:kerberos_5:1.9:*:*:*:*:*:*:* | 1.9 | Vulnerable | moos-ivp |
- cpe:2.3:a:mit:kerberos_5:1.7:*:*:*:*:*:*:* Versions 1.7 Vulnerable ·moos-ivp
- cpe:2.3:a:mit:kerberos_5:1.7.1:*:*:*:*:*:*:* Versions 1.7.1 Vulnerable ·moos-ivp
- cpe:2.3:a:mit:kerberos_5:1.8:*:*:*:*:*:*:* Versions 1.8 Vulnerable ·moos-ivp
- cpe:2.3:a:mit:kerberos_5:1.8.1:*:*:*:*:*:*:* Versions 1.8.1 Vulnerable ·moos-ivp
- cpe:2.3:a:mit:kerberos_5:1.8.2:*:*:*:*:*:*:* Versions 1.8.2 Vulnerable ·moos-ivp
- cpe:2.3:a:mit:kerberos_5:1.8.3:*:*:*:*:*:*:* Versions 1.8.3 Vulnerable ·moos-ivp
- cpe:2.3:a:mit:kerberos_5:1.9:*:*:*:*:*:*:* Versions 1.9 Vulnerable ·moos-ivp
Remediation
Red Hat 1 advisory
- RHSA-2011:0356 Released 2011-03-16 · Red Hat rating Importantkrb5 security update
- Red Hat Enterprise Linux Desktop (v. 6) krb5-1.8.2-3.el6_0.6, krb5-libs-1.8.2-3.el6_0.6, krb5-pkinit-openssl-1.8.2-3.el6_0.6 +1
- Red Hat Enterprise Linux Desktop Optional (v. 6) krb5-1.8.2-3.el6_0.6, krb5-devel-1.8.2-3.el6_0.6, krb5-server-1.8.2-3.el6_0.6 +1
- Red Hat Enterprise Linux HPC Node (v. 6) krb5-1.8.2-3.el6_0.6, krb5-libs-1.8.2-3.el6_0.6
- Red Hat Enterprise Linux HPC Node Optional (v. 6) krb5-1.8.2-3.el6_0.6, krb5-devel-1.8.2-3.el6_0.6, krb5-pkinit-openssl-1.8.2-3.el6_0.6 +3
- Red Hat Enterprise Linux Server (v. 6) krb5-1.8.2-3.el6_0.6, krb5-devel-1.8.2-3.el6_0.6, krb5-devel-1.8.2-3.el6_0.6.ppc +7
- Red Hat Enterprise Linux Workstation (v. 6) krb5-1.8.2-3.el6_0.6, krb5-devel-1.8.2-3.el6_0.6, krb5-libs-1.8.2-3.el6_0.6 +4
Vendor assessments
Red Hat
Red Hat rating: Important. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux Desktop (v. 6) | Fixed | RHSA-2011:0356 |
| Red Hat Enterprise Linux Desktop Optional (v. 6) | Fixed | RHSA-2011:0356 |
| Red Hat Enterprise Linux HPC Node (v. 6) | Fixed | RHSA-2011:0356 |
| Red Hat Enterprise Linux HPC Node Optional (v. 6) | Fixed | RHSA-2011:0356 |
| Red Hat Enterprise Linux Server (v. 6) | Fixed | RHSA-2011:0356 |
| Red Hat Enterprise Linux Workstation (v. 6) | Fixed | RHSA-2011:0356 |
Not affected: 2 products
- Red Hat Enterprise Linux 4
- Red Hat Enterprise Linux 5
Timeline
- 2026-10-02 Threatist record created from CVE-2011-0284
- 2026-10-03 Alias added: GHSA-w63f-q474-3fj3
References
More moos-ivp Kerberos 5 vulnerabilities
- TI-2024-17421 Kerberos 5 (aka krb5) 1.21.2 contains a memory leak vulnerability in /krb5/src/lib/gssapi/krb5/k5sealv3.c. CVSS 3.1HIGH 7.5
- TI-2001-00539 Buffer overflow in BSD-based telnetd telnet daemon on various operating systems allows… CVSS 2.0HIGH 10.0
- TI-2026-29130 NULL pointer dereference in moos-ivp Kerberos 5 CVSS 3.1HIGH 7.5
- TI-2007-00929 The telnet daemon (telnetd) in MIT krb5 before 1.6.1 allows remote attackers to bypass… CVSS 2.0HIGH 10.0
- TI-2011-00268 The process_chpw_request function in schpw.c in the password-changing functionality in… CVSS 2.0HIGH 10.0
- TI-2001-00245 Buffer overflows in BSD-based FTP servers allows remote attackers to execute arbitrary… CVSS 2.0HIGH 10.0
Sources
- CVE-2011-0284 · CVE Program
- CVE-2011-0284 · NVD
- FIRST EPSS
- GHSA-w63f-q474-3fj3 · GitHub Advisory Database · CC BY 4.0
- CVE-2011-0284 · Red Hat security data · CC BY 4.0
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