MIT Kerberos 5-1.11/5-1.11.1/5-1.11.2/5-1.11.3 Request do_tgs_req.c input validation

CVSS Meta Temp Score
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CTI Interest Score
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7.2$0-$5k0.00

Summaryinfo

A vulnerability was found in MIT Kerberos 5-1.11/5-1.11.1/5-1.11.2/5-1.11.3. It has been rated as problematic. The impacted element is an unknown function of the file do_tgs_req.c of the component Request Handler. The manipulation leads to input validation. This vulnerability is traded as CVE-2013-1417. There is no exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in MIT Kerberos 5-1.11/5-1.11.1/5-1.11.2/5-1.11.3 (Network Authentication Software). It has been rated as critical. This issue affects an unknown function of the file do_tgs_req.c of the component Request Handler. The manipulation with an unknown input leads to a input validation vulnerability. Using CWE to declare the problem leads to CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. Impacted is availability. The summary by CVE is:

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 used, allows remote authenticated users to cause a denial of service (daemon crash) via a TGS-REQ request that triggers an attempted cross-realm referral for a host-based service principal.

The weakness was shared 06/21/2013 by Jerome Sol as KDC null deref due to referrals as not defined bug report (Bugtraq). The advisory is shared at bugzilla.redhat.com. The identification of this vulnerability is CVE-2013-1417 since 01/24/2013. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 70958 (Fedora 20 : krb5-1.11.3-32.fc20 (2013-21456)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Fedora Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 123426 (Fedora Security Update for krb5 (FEDORA-2015-2382)).

Upgrading to version 1.11.4 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version. A possible mitigation has been published immediately after the disclosure of the vulnerability. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 16307.

The vulnerability is also documented in the databases at X-Force (89107), Tenable (70958), SecurityFocus (BID 63555†), OSVDB (100077†) and Vulnerability Center (SBV-42375†). The entry VDB-11106 is related to this item. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.2

VulDB Base Score: 7.5
VulDB Temp Score: 7.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

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Exploitinginfo

Class: Input validation
CWE: CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 70958
Nessus Name: Fedora 20 : krb5-1.11.3-32.fc20 (2013-21456)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 867099
OpenVAS Name: Fedora Update for krb5 FEDORA-2013-21786
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: Kerberos 1.11.4
Patch: github.com
TippingPoint: 🔍

McAfee IPS: 🔍
McAfee IPS Version: 🔍

ISS Proventia IPS: 🔍
Fortigate IPS: 🔍

Timelineinfo

01/24/2013 🔍
06/21/2013 +148 days 🔍
06/21/2013 +0 days 🔍
11/04/2013 +135 days 🔍
11/14/2013 +10 days 🔍
11/19/2013 +5 days 🔍
11/20/2013 +1 days 🔍
11/26/2013 +6 days 🔍
11/26/2013 +0 days 🔍
06/02/2021 +2745 days 🔍

Sourcesinfo

Vendor: mit.edu

Advisory: KDC null deref due to referrals
Researcher: Jerome Sol
Status: Not defined
Confirmation: 🔍

CVE: CVE-2013-1417 (🔍)
GCVE (CVE): GCVE-0-2013-1417
GCVE (VulDB): GCVE-100-11249
X-Force: 89107
SecurityFocus: 63555
OSVDB: 100077
Vulnerability Center: 42375 - MIT Kerberos 5 1.11 Before 1.11.4 Remote Authenticated Denial of Service via a TGS-REQ Request, Medium

See also: 🔍

Entryinfo

Created: 11/26/2013 13:11
Updated: 06/02/2021 13:36
Changes: 11/26/2013 13:11 (83), 05/15/2017 12:03 (2), 06/02/2021 13:31 (4), 06/02/2021 13:36 (1)
Complete: 🔍
Committer: olku
Cache ID: 216:671:103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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