CVE-2010-4021
The Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) 1.7 does not properly restrict the...
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."
Exploit likelihood
What each source reports
NVD Score used
2.1
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."
- Record
CVE-2010-4021- CVSS 2.0
- 2.1 Low
AV:N/AC:H/Au:S/C:N/I:P/A:N - Weakness
- CWE-16, CWE-264
- Updated
- 2026-11-02
CVE List No score
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."
- Record
CVE-2010-4021- Updated
- 2026-11-02
EUVDEUVD-2010-3997 No score
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."
- Record
EUVD-2010-3997- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-w2r7-v523-8fwv No score
The Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) 1.7 does not properly restrict the...
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."
- Record
GHSA-w2r7-v523-8fwv- Updated
- 2026-11-02
OSV No score
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."
- Record
CVE-2010-4021- Updated
- 2026-11-02
OSVDEBIAN-CVE-2010-4021 No score
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."
- Record
DEBIAN-CVE-2010-4021- Updated
- 2026-11-02
OSVopenSUSE-SU-2024:10004-1 No score
krb5-1.15-1.1 on GA media
These are all security issues fixed in the krb5-1.15-1.1 package on the GA media of openSUSE Tumbleweed.
- Record
openSUSE-SU-2024:10004-1- Updated
- 2026-11-02
Affected products
Affected packages
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, facts | ||
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2010-4021 is a low vulnerability (CVSS 2.1) in Mit Kerberos 5, published December 2, 2010. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.09%, the 81st percentile. Fixed in krb5 1.8+dfsg~alpha1-1.
References
vupen.com/english/advisories/2010/3094
mandriva.com/security/advisories?name=MDVSA-2010:246
kb.vmware.com/kb/1035108
vupen.com/english/advisories/2010/3118
securityfocus.com/archive/1/514953/100/0/threaded
lists.opensuse.org/opensuse-security-announce/2010-12/msg00000.html
Show 68 moreShow less
osvdb.org/69607
vmware.com/security/advisories/VMSA-2011-0007.html
lists.apple.com/archives/security-announce/2011/Mar/msg00006.html
web.mit.edu/kerberos/advisories/MITKRB5-SA-2010-007.txt
securityfocus.com/bid/45122
lists.vmware.com/pipermail/security-announce/2011/000133.html
securitytracker.com/id?1024803
securityfocus.com/archive/1/517739/100/0/threaded
lists.opensuse.org/opensuse-security-announce/2010-12/msg00006.html
ubuntu.com/usn/USN-1030-1
support.apple.com/kb/HT4581
nvd.nist.gov/vuln/detail/CVE-2010-4021
github.com/advisories/GHSA-w2r7-v523-8fwv
security-tracker.debian.org/tracker/CVE-2010-4021
suse.com/security/cve/CVE-2002-2443
suse.com/security/cve/CVE-2009-0844
suse.com/security/cve/CVE-2009-0845
suse.com/security/cve/CVE-2009-0846
suse.com/security/cve/CVE-2009-0847
suse.com/security/cve/CVE-2009-3295
suse.com/security/cve/CVE-2009-4212
suse.com/security/cve/CVE-2010-0283
suse.com/security/cve/CVE-2010-0628
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suse.com/security/cve/CVE-2010-1324
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suse.com/security/cve/CVE-2010-4021
suse.com/security/cve/CVE-2010-4022
suse.com/security/cve/CVE-2011-0281
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suse.com/security/cve/CVE-2011-0284
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suse.com/security/cve/CVE-2011-1527
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