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CVE-2013-1416· NVD / CVE Program· CNA mitre

The prep_reprocess_req function in do_tgs_req.c in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) before 1.10.5 does not pro

Noroxi assessment

Priority: Monitor (action score 17/100)

  • 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: 2.9% (FIRST EPSS); higher than 86.8% of all records.
  • No special conditions are required; it is repeatable.
  • Fixed version: krb5 (Debian:12) 1.10.1+dfsg-5; krb5 (Red Hat:enterprise_linux:6::client) 0:1.10.3-10.el6_4.2; krb5-debuginfo (Red Hat:enterprise_linux:6::client) 0:1.10.3-10.el6_4.2.

Low priority for now. Upgrade to krb5 (Debian:12) 1.10.1+dfsg-5; krb5 (Red Hat:enterprise_linux:6::client) 0:1.10.3-10.el6_4.2; krb5-debuginfo (Red Hat:enterprise_linux:6::client) 0:1.10.3-10.el6_4.2 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

The prep_reprocess_req function in do_tgs_req.c in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) before 1.10.5 does not properly perform service-principal realm referral, which allows remote authenticated users to cause a denial of service (NULL pointer dereference and daemon crash) via a crafted TGS-REQ request.

MediumCVSS 4.0 · v2.0—No exploit Fix available
Published
Apr 19, 2013
Updated
Jun 16, 2026
EPSS
2.9% · 86th percentile

Report tools

JSON

Action score

17

Monitor

Low priority for now.

CVSS
16 / 40 · 4.0 / 10
CISA KEV
0 / 30 · Not listed
EPSS
1 / 30 · 2.9%

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
opensuseopensuse
fedoraprojectfedora
redhatenterprise linux desktop
redhatenterprise linux eus
redhatenterprise linux server
redhatenterprise linux server aus
redhatenterprise linux workstation

Affected versions

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

  • fedoraproject fedora17
  • fedoraproject fedora18
  • mit kerberos 5before 1.10.5
  • opensuse opensuse11.4
  • opensuse opensuse12.1
  • opensuse opensuse12.2
  • opensuse opensuse12.3
  • redhat enterprise linux desktop6.0
  • redhat enterprise linux eus6.4
  • redhat enterprise linux server6.0
  • redhat enterprise linux server aus6.4
  • redhat enterprise linux workstation6.0

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12krb5before 1.10.1+dfsg-51.10.1+dfsg-5
Red Hat:enterprise_linux:6::clientkrb5before 0:1.10.3-10.el6_4.20:1.10.3-10.el6_4.2
Red Hat:enterprise_linux:6::clientkrb5-debuginfobefore 0:1.10.3-10.el6_4.20:1.10.3-10.el6_4.2
Red Hat:enterprise_linux:6::clientkrb5-develbefore 0:1.10.3-10.el6_4.20:1.10.3-10.el6_4.2
Red Hat:enterprise_linux:6::clientkrb5-libsbefore 0:1.10.3-10.el6_4.20:1.10.3-10.el6_4.2
Red Hat:enterprise_linux:6::clientkrb5-pkinit-opensslbefore 0:1.10.3-10.el6_4.20:1.10.3-10.el6_4.2
Red Hat:enterprise_linux:6::clientkrb5-serverbefore 0:1.10.3-10.el6_4.20:1.10.3-10.el6_4.2
Red Hat:enterprise_linux:6::clientkrb5-server-ldapbefore 0:1.10.3-10.el6_4.20:1.10.3-10.el6_4.2
Red Hat:enterprise_linux:6::clientkrb5-workstationbefore 0:1.10.3-10.el6_4.20:1.10.3-10.el6_4.2

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-2012-1016Mar 5, 2013 · The pkinit_server_return_padata function in plugins/preauth/pkinit/pkinit_srv.c in the PKINIT implementation in the Key Distribution Center
    21Monitor
  • ← EarlierCVE-2013-1415Mar 5, 2013 · The pkinit_check_kdc_pkid function in plugins/preauth/pkinit/pkinit_crypto_openssl.c in the PKINIT implementation in the Key Distribution Ce
    21Monitor
  • Later →CVE-2002-2443May 29, 2013 · schpw.c in the kpasswd service in kadmind in MIT Kerberos 5 (aka krb5) before 1.11.3 does not properly validate UDP packets before sending r
    22Monitor

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:krb51.10.1+dfsg-5 · Debian:12Package registry (OSV)
red hat:krb50:1.10.3-10.el6_4.2 · Red Hat:enterprise_linux:6::clientPackage registry (OSV)
red hat:krb5-debuginfo0:1.10.3-10.el6_4.2 · Red Hat:enterprise_linux:6::clientPackage registry (OSV)
red hat:krb5-devel0:1.10.3-10.el6_4.2 · Red Hat:enterprise_linux:6::clientPackage registry (OSV)
red hat:krb5-libs0:1.10.3-10.el6_4.2 · Red Hat:enterprise_linux:6::clientPackage registry (OSV)
red hat:krb5-pkinit-openssl0:1.10.3-10.el6_4.2 · Red Hat:enterprise_linux:6::clientPackage registry (OSV)
red hat:krb5-server0:1.10.3-10.el6_4.2 · Red Hat:enterprise_linux:6::clientPackage registry (OSV)
red hat:krb5-server-ldap0:1.10.3-10.el6_4.2 · Red Hat:enterprise_linux:6::clientPackage registry (OSV)
red hat:krb5-workstation0:1.10.3-10.el6_4.2 · 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.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

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

  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
P · the service can be disrupted
Attack complexity
Low
Confidentiality impact
None
Integrity impact
None
Availability impact
P

Weakness class (CWE)

CWE-476 · NULL Pointer Dereference

CVSS vector

AV:N/AC:L/Au:S/C:N/I:N/A:P

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 (9 more)

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

All records