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CVE-2010-4021
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…
- 2.1LowCVSS base score
- 2.1%Exploitation in 30 daysEPSS · top 18% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
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."
Timeline
ID reserved
By mitre
- 43 days later
· 43 days later
Published
- 14 years later
· 14 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 2.0 | Low2.1 | AV:N/AC:H/Au:S/C:N/I:P/A:N |
- EPSS (exploitation in 30 days)
- 2.1% · top 18% of all CVEs (11 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Low 2.1.
Affected products
n/a
- affected n/a
References
References17
- ADV-2010-3094 (opens in a new tab)vdb-entryx_refsource_VUPENx_transferred
- MDVSA-2010:246 (opens in a new tab)vendor-advisoryx_refsource_MANDRIVAx_transferred
- http://kb.vmware.com/kb/1035108 (opens in a new tab)x_refsource_CONFIRMx_transferred
- ADV-2010-3118 (opens in a new tab)vdb-entryx_refsource_VUPENx_transferred
- 20101130 MITKRB5-SA-2010-007 Multiple checksum handling vulnerabilities [CVE-2010-1324 CVE-2010-1323 CVE-2010-4020 CVE-2010-4021] (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
- SUSE-SR:2010:023 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- 69607 (opens in a new tab)vdb-entryx_refsource_OSVDBx_transferred
- http://www.vmware.com/security/advisories/VMSA-2011-0007.html (opens in a new tab)x_refsource_CONFIRMx_transferred
- APPLE-SA-2011-03-21-1 (opens in a new tab)vendor-advisoryx_refsource_APPLEx_transferred
- http://web.mit.edu/kerberos/advisories/MITKRB5-SA-2010-007.txt (opens in a new tab)x_refsource_CONFIRMx_transferred
- 45122 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- [security-announce] 20110428 VMSA-2011-0007 VMware ESXi and ESX Denial of Service and third party updates for Likewise components and ESX Service Console (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- 1024803 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred
- 20110428 VMSA-2011-0007 VMware ESXi and ESX Denial of Service and third party updates for Likewise components and ESX Service Console (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
- SUSE-SR:2010:024 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- USN-1030-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- http://support.apple.com/kb/HT4581 (opens in a new tab)x_refsource_CONFIRMx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2010-3997 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2010-4021)Record last updated .