CVE-2021-37750: Null Pointer Dereference
First published: Mon Aug 23 2021(Updated: )
The Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) before 1.18.5 and 1.19.x before 1.19.3 has a NULL pointer dereference in kdc/do_tgs_req.c via a FAST inner body that lacks a server field.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| MIT Kerberos 5 | <1.18.5 | |
| MIT Kerberos 5 | >=1.19.0<1.19.3 | |
| Fedoraproject Fedora | =33 | |
| Debian Debian Linux | =9.0 | |
| Starwindsoftware Starwind Virtual San | =v8r13-14338 | |
| Oracle Communications Cloud Native Core Network Slice Selection Function | =22.1.0 |
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Reference Links
- https://github.com/krb5/krb5/commit/d775c95af7606a51bf79547a94fa52ddd1cb7f49
- https://github.com/krb5/krb5/releases
- https://lists.debian.org/debian-lts-announce/2021/09/msg00019.html
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MFCLW7D46E4VCREKKH453T5DA4XOLHU2/
- https://security.netapp.com/advisory/ntap-20210923-0002/
- https://web.mit.edu/kerberos/advisories/
- https://www.oracle.com/security-alerts/cpujul2022.html
- https://www.starwindsoftware.com/security/sw-20220817-0004/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MFCLW7D46E4VCREKKH453T5DA4XOLHU2/
Frequently Asked Questions
What is CVE-2021-37750?
CVE-2021-37750 is a vulnerability in the Key Distribution Center (KDC) in MIT Kerberos 5 that allows for a NULL pointer dereference via a FAST inner body that lacks a server field.
How does CVE-2021-37750 impact MIT Kerberos 5?
CVE-2021-37750 affects MIT Kerberos 5 versions before 1.18.5 and 1.19.x before 1.19.3, leading to a NULL pointer dereference in kdc/do_tgs_req.c.
What is the severity of CVE-2021-37750?
CVE-2021-37750 has a severity rating of 6.5, which is classified as medium.
How can I fix CVE-2021-37750?
To fix CVE-2021-37750, it is recommended to upgrade to MIT Kerberos 5 version 1.18.5 or apply the necessary patches provided by the vendor.
Are there any references for CVE-2021-37750?
Yes, you can find more information about CVE-2021-37750 at the following references: [Link 1](https://github.com/krb5/krb5/commit/d775c95af7606a51bf79547a94fa52ddd1cb7f49), [Link 2](https://github.com/krb5/krb5/releases), [Link 3](https://lists.debian.org/debian-lts-announce/2021/09/msg00019.html).
- agent/remedy
- agent/type
- agent/softwarecombine
- collector/nvd-index
- agent/software-canonical-lookup-request
- agent/weakness
- agent/severity
- agent/author
- agent/description
- collector/mitre-cve
- source/MITRE
- agent/last-modified-date
- agent/references
- agent/tags
- agent/first-publish-date
- agent/event
- agent/source
- vendor/mit
- canonical/mit kerberos 5
- version/mit kerberos 5/1.19.0
- vendor/fedoraproject
- canonical/fedoraproject fedora
- version/fedoraproject fedora/33
- vendor/debian
- canonical/debian debian linux
- version/debian debian linux/9.0
- vendor/starwindsoftware
- canonical/starwindsoftware starwind virtual san
- version/starwindsoftware starwind virtual san/v8r13-14338
- vendor/oracle
- canonical/oracle communications cloud native core network slice selection function
- version/oracle communications cloud native core network slice selection function/22.1.0