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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...

2.1 LowFix available

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

2.09%Down 0.1 points since Feb 4, 2022
90%50%10%1%

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 LowAV: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

Affected packages
PackageAffectedFixed
krb5
Debian:12
before 1.8+dfsg~alpha1-1
1.8+dfsg~alpha1-1
krb5
Debian:13
before 1.8+dfsg~alpha1-1
1.8+dfsg~alpha1-1
krb5
Debian:14
before 1.8+dfsg~alpha1-1
1.8+dfsg~alpha1-1
krb5
openSUSE:Tumbleweed
From an advisory covering 54 CVEs
before 1.15-1.1
1.15-1.1

History

History
RecordedChangedSources
affected, facts
aliasesEUVD
first indexedCVE 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

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