CVE-2021-36222: Null Pointer Dereference
First published: Wed Jul 21 2021(Updated: )
ec_verify in kdc/kdc_preauth_ec.c in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) before 1.18.4 and 1.19.x before 1.19.2 allows remote attackers to cause a NULL pointer dereference and daemon crash. This occurs because a return value is not properly managed in a certain situation.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| debian/krb5 | <=1.17-3+deb10u1<=1.17-3<=1.18.3-5 | 1.18.3-6 1.17-3+deb10u2 |
| debian/krb5 | 1.17-3+deb10u4 1.17-3+deb10u5 1.18.3-6+deb11u4 1.18.3-6+deb11u3 1.20.1-2+deb12u1 1.20.1-4 | |
| MIT Kerberos 5 | <1.18.4 | |
| MIT Kerberos 5 | >=1.19.0<1.19.2 | |
| Debian Debian Linux | =10.0 | |
| Netapp Active Iq Unified Manager Vmware Vsphere | ||
| Netapp Active Iq Unified Manager Windows | ||
| NetApp OnCommand Insight | ||
| NetApp OnCommand Workflow Automation | ||
| Netapp Snapcenter | ||
| Oracle Mysql Server | >=8.0.0<=8.0.26 |
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Reference Links
- https://security-tracker.debian.org/tracker/CVE-2021-36222
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-36222
- https://github.com/krb5/krb5/commit/fc98f520caefff2e5ee9a0026fdf5109944b3562
- https://security-tracker.debian.org/tracker/CVE-2021-32761
- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=991365
- http://krbdev.mit.edu/rt/Ticket/Display.html?id=9007
- https://github.com/krb5/krb5/releases
- https://security.netapp.com/advisory/ntap-20211022-0003/
- https://security.netapp.com/advisory/ntap-20211104-0007/
- https://web.mit.edu/kerberos/advisories/
- https://www.debian.org/security/2021/dsa-4944
- https://www.oracle.com/security-alerts/cpuoct2021.html
Frequently Asked Questions
What is the vulnerability ID for this vulnerability?
The vulnerability ID is CVE-2021-36222.
What is the severity of CVE-2021-36222?
The severity of CVE-2021-36222 is high with a severity value of 7.5.
Which software is affected by CVE-2021-36222?
MIT Kerberos 5 before 1.18.4 and 1.19.x before 1.19.2 are affected by CVE-2021-36222.
How can remote attackers exploit CVE-2021-36222?
Remote attackers can exploit CVE-2021-36222 to cause a NULL pointer dereference and daemon crash.
Where can I find more information about CVE-2021-36222?
You can find more information about CVE-2021-36222 on the MIT Kerberos 5 GitHub page and the NetApp security advisory page.
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