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 | Current Exploit Price (≈) | CTI Interest Score |
---|---|---|
3.4 | $0-$5k | 0.00 |
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.
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.
Product
Type
Vendor
Name
Version
License
CPE 2.3
CPE 2.2
CVSSv4
VulDB CVSS-B Score: 🔍VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍
CVSSv3
VulDB Meta Base Score: 3.5VulDB Meta Temp Score: 3.4
VulDB Base Score: 3.5
VulDB Temp Score: 3.4
VulDB Vector: 🔍
VulDB Reliability: 🔍
CVSSv2
AV | AC | Au | C | I | A |
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💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
Vector | Complexity | Authentication | Confidentiality | Integrity | Availability |
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unlock | unlock | unlock | unlock | unlock | unlock |
unlock | unlock | unlock | unlock | unlock | unlock |
unlock | unlock | unlock | unlock | unlock | unlock |
VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍
Exploiting
Class: Null pointer dereferenceCWE: CWE-476 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍
Local: No
Remote: Partially
Availability: 🔍
Status: Not defined
EPSS Score: 🔍
EPSS Percentile: 🔍
Price Prediction: 🔍
Current Price Estimation: 🔍
0-Day | unlock | unlock | unlock | unlock |
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Today | unlock | unlock | unlock | unlock |
Threat Intelligence
Interest: 🔍Active Actors: 🔍
Active APT Groups: 🔍
Countermeasures
Recommended: UpgradeStatus: 🔍
0-Day Time: 🔍
Upgrade: Kerberos 5 1.18.5/1.19.3
Patch: github.com
Timeline
07/30/2021 🔍08/23/2021 🔍
08/23/2021 🔍
08/25/2021 🔍
Sources
Vendor: mit.eduAdvisory: d775c95af7606a51bf79547a94fa52ddd1cb7f49
Status: Confirmed
Confirmation: 🔍
CVE: CVE-2021-37750 (🔍)
Entry
Created: 08/23/2021 12:46Updated: 08/25/2021 19:32
Changes: 08/23/2021 12:46 (42), 08/25/2021 19:32 (3)
Complete: 🔍
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