MIT Kerberos 5 up to 1.18.4/1.19.2 Key Distribution Center kdc/do_tgs_req.c null pointer dereference

CVSS Meta Temp Score
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CTI Interest Score
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3.4$0-$5k0.00

Summaryinfo

A vulnerability marked as problematic has been reported in MIT Kerberos 5 up to 1.18.4/1.19.2. This vulnerability affects unknown code of the file kdc/do_tgs_req.c of the component Key Distribution Center Handler. The manipulation leads to null pointer dereference. This vulnerability is listed as CVE-2021-37750. There is no available exploit. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in MIT Kerberos 5 up to 1.18.4/1.19.2 (Network Authentication Software) and classified as problematic. This issue affects an unknown code of the file kdc/do_tgs_req.c of the component Key Distribution Center Handler. The manipulation with an unknown input leads to a null pointer dereference vulnerability. Using CWE to declare the problem leads to CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. Impacted is availability.

The weakness was presented 08/23/2021 as d775c95af7606a51bf79547a94fa52ddd1cb7f49. It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2021-37750. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 207970 (Oracle Linux 7 : krb5 (ELSA-2024-5076)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 1.18.5 or 1.19.3 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.

The vulnerability is also documented in the vulnerability database at Tenable (207970). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

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Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 3.5
VulDB Meta Temp Score: 3.4

VulDB Base Score: 3.5
VulDB Temp Score: 3.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 207970
Nessus Name: Oracle Linux 7 : krb5 (ELSA-2024-5076)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Kerberos 5 1.18.5/1.19.3
Patch: github.com

Timelineinfo

07/30/2021 🔍
08/23/2021 +24 days 🔍
08/23/2021 +0 days 🔍
10/02/2024 +1136 days 🔍

Sourcesinfo

Vendor: mit.edu

Advisory: d775c95af7606a51bf79547a94fa52ddd1cb7f49
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2021-37750 (🔍)
GCVE (CVE): GCVE-0-2021-37750
GCVE (VulDB): GCVE-100-181283

Entryinfo

Created: 08/23/2021 12:46
Updated: 10/02/2024 09:47
Changes: 08/23/2021 12:46 (42), 08/25/2021 19:32 (3), 10/02/2024 09:47 (16)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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