Medium severity6.3NVD Advisory· Published Dec 2, 2010· Updated Jun 16, 2026
CVE-2010-4020
CVE-2010-4020
Description
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
6cpe:2.3:a:mit:kerberos_5:1.8:*:*:*:*:*:*:*+ 4 more
- cpe:2.3:a:mit:kerberos_5:1.8:*:*:*:*:*:*:*
- cpe:2.3:a:mit:kerberos_5:1.8.1:*:*:*:*:*:*:*
- cpe:2.3:a:mit:kerberos_5:1.8.2:*:*:*:*:*:*:*
- cpe:2.3:a:mit:kerberos_5:1.8.3:*:*:*:*:*:*:*
- (no CPE)range: >=1.8, <=1.8.3
Patches
Vulnerability mechanics
References
23- www.oracle.com/technetwork/topics/security/cpujul2015-2367936.htmlnvdPatchVendor Advisory
- secunia.com/advisories/42399nvdVendor Advisory
- web.mit.edu/kerberos/advisories/MITKRB5-SA-2010-007.txtnvdVendor Advisory
- kb.vmware.com/kb/1035108nvd
- lists.apple.com/archives/security-announce/2011/Mar/msg00006.htmlnvd
- lists.fedoraproject.org/pipermail/package-announce/2010-December/051976.htmlnvd
- lists.fedoraproject.org/pipermail/package-announce/2010-December/051999.htmlnvd
- lists.opensuse.org/opensuse-security-announce/2010-12/msg00000.htmlnvd
- lists.opensuse.org/opensuse-security-announce/2010-12/msg00006.htmlnvd
- lists.vmware.com/pipermail/security-announce/2011/000133.htmlnvd
- osvdb.org/69608nvd
- support.apple.com/kb/HT4581nvd
- www.mandriva.com/security/advisoriesnvd
- www.redhat.com/support/errata/RHSA-2010-0925.htmlnvd
- www.securityfocus.com/archive/1/514953/100/0/threadednvd
- www.securityfocus.com/archive/1/517739/100/0/threadednvd
- www.securityfocus.com/bid/45117nvd
- www.securitytracker.com/idnvd
- www.ubuntu.com/usn/USN-1030-1nvd
- www.vmware.com/security/advisories/VMSA-2011-0007.htmlnvd
- www.vupen.com/english/advisories/2010/3094nvd
- www.vupen.com/english/advisories/2010/3095nvd
- www.vupen.com/english/advisories/2010/3118nvd
News mentions
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