CVE-2010-4020
First published: Thu Dec 02 2010(Updated: )
MIT Kerberos 5 (aka krb5) 1.8.x through 1.8.3 does not reject RC4 key-derivation checksums, which might allow remote authenticated users to forge a (1) AD-SIGNEDPATH or (2) AD-KDC-ISSUED signature, and possibly gain privileges, by leveraging the small key space that results from certain one-byte stream-cipher operations.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| MIT Kerberos 5 Application | =1.8 | |
| MIT Kerberos 5 Application | =1.8.1 | |
| MIT Kerberos 5 Application | =1.8.2 | |
| MIT Kerberos 5 Application | =1.8.3 |
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Reference Links
- http://web.mit.edu/kerberos/advisories/MITKRB5-SA-2010-007.txt
- http://www.redhat.com/support/errata/RHSA-2010-0925.html
- http://www.mandriva.com/security/advisories?name=MDVSA-2010:246
- http://osvdb.org/69608
- http://www.securityfocus.com/bid/45117
- http://secunia.com/advisories/42399
- http://www.securitytracker.com/id?1024803
- http://www.vupen.com/english/advisories/2010/3095
- http://www.vupen.com/english/advisories/2010/3118
- http://www.vupen.com/english/advisories/2010/3094
- http://lists.fedoraproject.org/pipermail/package-announce/2010-December/051999.html
- http://lists.fedoraproject.org/pipermail/package-announce/2010-December/051976.html
- 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.oracle.com/technetwork/topics/security/cpujul2015-2367936.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-2010-4020?
CVE-2010-4020 is considered a medium severity vulnerability due to the potential for privilege escalation through forged signatures.
How do I fix CVE-2010-4020?
To fix CVE-2010-4020, upgrade MIT Kerberos 5 to a version later than 1.8.3.
What systems are affected by CVE-2010-4020?
CVE-2010-4020 affects MIT Kerberos 5 versions 1.8, 1.8.1, 1.8.2, and 1.8.3.
What types of attacks can CVE-2010-4020 be exploited for?
CVE-2010-4020 can be exploited to forge AD-SIGNEDPATH or AD-KDC-ISSUED signatures by authenticated remote users.
Is CVE-2010-4020 specific to any particular configuration?
CVE-2010-4020 can occur due to specific weak key configurations in MIT Kerberos 5.
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- collector/mitre-cve
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- agent/author
- agent/references
- agent/description
- agent/first-publish-date
- agent/event
- agent/source
- collector/nvd-index
- agent/software-canonical-lookup-request
- collector/nvd-historical
- agent/softwarecombine
- agent/tags
- vendor/mit
- canonical/mit kerberos 5 application
- version/mit kerberos 5 application/1.8
- version/mit kerberos 5 application/1.8.1
- version/mit kerberos 5 application/1.8.2
- version/mit kerberos 5 application/1.8.3