CVE-2010-4021
First published: Thu Dec 02 2010(Updated: )
The Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) 1.7 does not properly restrict the use of TGT credentials for armoring TGS requests, which might allow remote authenticated users to impersonate a client by rewriting an inner request, aka a "KrbFastReq forgery issue."
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| MIT Kerberos 5 | =1.7 |
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Reference Links
- http://web.mit.edu/kerberos/advisories/MITKRB5-SA-2010-007.txt
- http://www.mandriva.com/security/advisories?name=MDVSA-2010:246
- http://osvdb.org/69607
- http://www.securityfocus.com/bid/45122
- http://www.securitytracker.com/id?1024803
- http://www.vupen.com/english/advisories/2010/3118
- http://www.vupen.com/english/advisories/2010/3094
- http://www.ubuntu.com/usn/USN-1030-1
- http://lists.opensuse.org/opensuse-security-announce/2010-12/msg00000.html
- http://lists.opensuse.org/opensuse-security-announce/2010-12/msg00006.html
- http://support.apple.com/kb/HT4581
- http://lists.apple.com/archives/security-announce/2011/Mar/msg00006.html
- http://www.vmware.com/security/advisories/VMSA-2011-0007.html
- http://kb.vmware.com/kb/1035108
- http://lists.vmware.com/pipermail/security-announce/2011/000133.html
- http://www.securityfocus.com/archive/1/517739/100/0/threaded
- http://www.securityfocus.com/archive/1/514953/100/0/threaded
Frequently Asked Questions
What is the severity of CVE-2010-4021?
CVE-2010-4021 has a moderate severity level as it allows remote authenticated users to potentially impersonate clients.
How do I fix CVE-2010-4021?
To fix CVE-2010-4021, upgrade to a patched version of MIT Kerberos 5 that resolves the TGT credential restriction issue.
Who is affected by CVE-2010-4021?
CVE-2010-4021 affects all users of MIT Kerberos 5 version 1.7.
What type of attack does CVE-2010-4021 facilitate?
CVE-2010-4021 facilitates impersonation attacks where an attacker can rewrite an inner request to act as a legitimate client.
Is CVE-2010-4021 exploitable without authentication?
No, CVE-2010-4021 is only exploitable by remote authenticated users with access to the vulnerable MIT Kerberos 5 service.
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- collector/mitre-cve
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- agent/last-modified-date
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- vendor/mit
- canonical/mit kerberos 5
- version/mit kerberos 5/1.7