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NVD / CVE Program· CNA mitre

CVE-2014-4343: Double free vulnerability in the init_ctx_reselect function in the SPNEGO initiator in lib/gssapi/spnego/spnego_mech.c in MIT Kerberos 5 (ak

Noroxi assessment

Priority: Monitor (action score 32/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 6.4% (FIRST EPSS); higher than 93.6% of all records.
  • Special conditions such as timing or configuration are required.
  • Fixed version: krb5 (Debian:12) 1.12.1+dfsg-5; krb5 (Debian:6.0) 1.8.3+dfsg-4squeeze8; krb5 (Debian:7) 1.10.1+dfsg-5+deb7u2.

Low priority for now. Upgrade to krb5 (Debian:12) 1.12.1+dfsg-5; krb5 (Debian:6.0) 1.8.3+dfsg-4squeeze8; krb5 (Debian:7) 1.10.1+dfsg-5+deb7u2 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

Double free vulnerability in the init_ctx_reselect function in the SPNEGO initiator in lib/gssapi/spnego/spnego_mech.c in MIT Kerberos 5 (aka krb5) 1.10.x through 1.12.x before 1.12.2 allows remote attackers to cause a denial of service (memory corruption) or possibly execute arbitrary code via network traffic that appears to come from an intended acceptor, but specifies a security mechanism different from the one proposed by the initiator.

HighCVSS 7.6 · v2.0—No exploit Fix available
Published
Aug 14, 2014
Updated
Jun 16, 2026
EPSS
6.4% · 93th percentile

Report tools

JSON

Action score

32

Monitor

Low priority for now.

CVSS
30 / 40 · 7.6 / 10
CISA KEV
0 / 30 · Not listed
EPSS
2 / 30 · 6.4%

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

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When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
mitkerberos 5
debiandebian linux
redhatenterprise linux desktop
redhatenterprise linux hpc node
redhatenterprise linux server
redhatenterprise linux workstation

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • debian debian linux7.0
  • mit kerberos 51.10
  • mit kerberos 51.10.1
  • mit kerberos 51.10.2
  • mit kerberos 51.10.3
  • mit kerberos 51.10.4
  • mit kerberos 51.11
  • mit kerberos 51.11.1
  • mit kerberos 51.11.2
  • mit kerberos 51.11.3
  • mit kerberos 51.11.4
  • mit kerberos 51.11.5
  • mit kerberos 51.12
  • mit kerberos 51.12.1
  • redhat enterprise linux desktop7.0
  • redhat enterprise linux hpc node7.0
  • redhat enterprise linux server7.0
  • redhat enterprise linux workstation7.0

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12krb5before 1.12.1+dfsg-51.12.1+dfsg-5
Debian:6.0krb5before 1.8.3+dfsg-4squeeze81.8.3+dfsg-4squeeze8
Debian:7krb5before 1.10.1+dfsg-5+deb7u21.10.1+dfsg-5+deb7u2
Red Hat:enterprise_linux:6::clientkrb5before 0:1.10.3-33.el60:1.10.3-33.el6
Red Hat:enterprise_linux:6::clientkrb5-debuginfobefore 0:1.10.3-33.el60:1.10.3-33.el6
Red Hat:enterprise_linux:6::clientkrb5-develbefore 0:1.10.3-33.el60:1.10.3-33.el6
Red Hat:enterprise_linux:6::clientkrb5-libsbefore 0:1.10.3-33.el60:1.10.3-33.el6
Red Hat:enterprise_linux:6::clientkrb5-pkinit-opensslbefore 0:1.10.3-33.el60:1.10.3-33.el6
Red Hat:enterprise_linux:6::clientkrb5-serverbefore 0:1.10.3-33.el60:1.10.3-33.el6
Red Hat:enterprise_linux:6::clientkrb5-server-ldapbefore 0:1.10.3-33.el60:1.10.3-33.el6
Red Hat:enterprise_linux:6::clientkrb5-workstationbefore 0:1.10.3-33.el60:1.10.3-33.el6
Red Hat:enterprise_linux:7::clientkrb5before 0:1.12.2-14.el70:1.12.2-14.el7
Red Hat:enterprise_linux:7::clientkrb5-debuginfobefore 0:1.12.2-14.el70:1.12.2-14.el7
Red Hat:enterprise_linux:7::clientkrb5-develbefore 0:1.12.2-14.el70:1.12.2-14.el7
Red Hat:enterprise_linux:7::clientkrb5-libsbefore 0:1.12.2-14.el70:1.12.2-14.el7
Red Hat:enterprise_linux:7::clientkrb5-pkinitbefore 0:1.12.2-14.el70:1.12.2-14.el7
Red Hat:enterprise_linux:7::clientkrb5-serverbefore 0:1.12.2-14.el70:1.12.2-14.el7
Red Hat:enterprise_linux:7::clientkrb5-server-ldapbefore 0:1.12.2-14.el70:1.12.2-14.el7
Red Hat:enterprise_linux:7::clientkrb5-workstationbefore 0:1.12.2-14.el70:1.12.2-14.el7

Same product

mit: all records

Other highest-scoring records for the same primary product.

  • CVE-2007-0956The telnet daemon (telnetd) in MIT krb5 before 1.6.1 allows remote attackers to bypass authentication and gain system access via a username
    49Plan
  • CVE-2011-0285The process_chpw_request function in schpw.c in the password-changing functionality in kadmind in MIT Kerberos 5 (aka krb5) 1.7 through 1.9
    46Plan
  • CVE-2001-0247Buffer overflows in BSD-based FTP servers allows remote attackers to execute arbitrary commands via a long pattern string containing a {} se
    46Plan

Published before and after this one in the same product

  • ← EarlierCVE-2013-1417Nov 20, 2013 · do_tgs_req.c in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) 1.11 before 1.11.4, when a single-component realm name is use
    15Monitor
  • ← EarlierCVE-2014-4341Jul 20, 2014 · MIT Kerberos 5 (aka krb5) before 1.12.2 allows remote attackers to cause a denial of service (buffer over-read and application crash) by inj
    22Monitor
  • Later →CVE-2014-4344Aug 14, 2014 · The acc_ctx_cont function in the SPNEGO acceptor in lib/gssapi/spnego/spnego_mech.c in MIT Kerberos 5 (aka krb5) 1.5.x through 1.12.x before
    33Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
debian:krb51.12.1+dfsg-5 · Debian:12Package registry (OSV)
red hat:krb50:1.10.3-33.el6 · Red Hat:enterprise_linux:6::clientPackage registry (OSV)
red hat:krb5-debuginfo0:1.10.3-33.el6 · Red Hat:enterprise_linux:6::clientPackage registry (OSV)
red hat:krb5-devel0:1.10.3-33.el6 · Red Hat:enterprise_linux:6::clientPackage registry (OSV)
red hat:krb5-libs0:1.10.3-33.el6 · Red Hat:enterprise_linux:6::clientPackage registry (OSV)
red hat:krb5-pkinit0:1.12.2-14.el7 · Red Hat:enterprise_linux:7::clientPackage registry (OSV)
red hat:krb5-pkinit-openssl0:1.10.3-33.el6 · Red Hat:enterprise_linux:6::clientPackage registry (OSV)
red hat:krb5-server0:1.10.3-33.el6 · Red Hat:enterprise_linux:6::clientPackage registry (OSV)
red hat:krb5-server-ldap0:1.10.3-33.el6 · Red Hat:enterprise_linux:6::clientPackage registry (OSV)
red hat:krb5-workstation0:1.10.3-33.el6 · Red Hat:enterprise_linux:6::clientPackage registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Special conditions such as timing or configuration are required.

If successful

Confidentiality
C · data can be read
Integrity
C · data or configuration can be modified
Availability
C · the service can be disrupted
Attack complexity
High
Confidentiality impact
C
Integrity impact
C
Availability impact
C

Weakness class (CWE)

CWE-415 · Double Free

CVSS vector

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

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (17 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records