CVE-2010-4020
MEDIUM · CVSS 6.3EPSS 1.9%EU EUVD
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.
Key facts
- CVSS score
- 6.3 (v3.0)
- Severity
- MEDIUM
- CVSS vector
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L- Weakness (CWE)
- CWE-310
- EPSS score
- 1.9% (80th percentile)
- In CISA KEV
- No
- In EU EUVD
- Yes (EUVD-2010-3996)
- Published
- December 2, 2010
- NVD last modified
- June 16, 2026
- Status
- Modified
EU Vulnerability Database (EUVD)
This vulnerability is also tracked by ENISA as EUVD-2010-3996 in the EU Vulnerability Database. Last updated in EUVD on August 7, 2024.
View on the EU Vulnerability DatabaseAffected products
- mit / kerberos 5
- mit / kerberos 5
- mit / kerberos 5
- mit / kerberos 5
References
- http://kb.vmware.com/kb/1035108
- http://lists.apple.com/archives/security-announce/2011/Mar/msg00006.html
- http://lists.fedoraproject.org/pipermail/package-announce/2010-December/051976.html
- http://lists.fedoraproject.org/pipermail/package-announce/2010-December/051999.html
- http://lists.opensuse.org/opensuse-security-announce/2010-12/msg00000.html
- http://lists.opensuse.org/opensuse-security-announce/2010-12/msg00006.html
- http://lists.vmware.com/pipermail/security-announce/2011/000133.html
- http://osvdb.org/69608
- http://secunia.com/advisories/42399(Vendor Advisory)
- http://support.apple.com/kb/HT4581
- http://web.mit.edu/kerberos/advisories/MITKRB5-SA-2010-007.txt(Vendor Advisory)
- http://www.mandriva.com/security/advisories?name=MDVSA-2010:246
- http://www.oracle.com/technetwork/topics/security/cpujul2015-2367936.html(Patch, Vendor Advisory)
- http://www.redhat.com/support/errata/RHSA-2010-0925.html
- http://www.securityfocus.com/archive/1/514953/100/0/threaded
- http://www.securityfocus.com/archive/1/517739/100/0/threaded
- http://www.securityfocus.com/bid/45117
- http://www.securitytracker.com/id?1024803
- http://www.ubuntu.com/usn/USN-1030-1
- http://www.vmware.com/security/advisories/VMSA-2011-0007.html
- http://www.vupen.com/english/advisories/2010/3094
- http://www.vupen.com/english/advisories/2010/3095
- http://www.vupen.com/english/advisories/2010/3118
Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS
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