CVE-2010-4020: n/a vulnerability

CVE-2010-4020: MIT Kerberos 5 (aka krb5) 1.8.x through 1.8.3 does not reject RC4 key-derivation checksums, which might all...

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.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 7, 2024, 03:26 UTC (UTC+00:00)

Security readout for executives and security teams

This flaw affects old MIT Kerberos 5 1.8.x through 1.8.3 deployments. An authenticated remote user may be able to forge certain Kerberos signatures and potentially gain privileges. The source bundle does not show active exploitation, CVSS scoring, or a KEV listing. Exposure is most likely in legacy systems still running MIT krb5 1.8.x through 1.8.3, or products that embedded vulnerable Kerberos components. Modern supported Linux, macOS, VMware, and Oracle stacks should be checked against their vendor advisories. Medium priority unless the organization relies on legacy Kerberos infrastructure or unsupported platforms. The business concern is privilege escalation inside an authenticated environment, not mass unauthenticated compromise based on the provided evidence. Mitigation focus: Identify MIT krb5 versions and embedded Kerberos packages across managed systems.; Apply relevant vendor security updates from MIT, Red Hat, Ubuntu, Fedora, SUSE, Apple, VMware, or Oracle.; Prioritize systems that provide Kerberos authentication or KDC-related services..

Prepared: Jun 28, 2026, 01:17 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Dec 2, 2010, 16:00 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors

0Timeline events

0ADP providers

1Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

CVE List V5 sourceCVE List V5

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

n/an/an/aListed

Weakness

CWE details

No CWE listed

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