Krb5: kerberos rc4-hmac-md5 checksum vulnerability enabling message spoofing via md5 collisions
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 1.22
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
- Exploitation: none
- Automatable: no
- Technical impact: partial
Summary
A vulnerability in the MIT Kerberos implementation allows GSSAPI-protected messages using RC4-HMAC-MD5 to be spoofed due to weaknesses in the MD5 checksum design. If RC4 is preferred over stronger encryption types, an attacker could exploit MD5 collisions to forge message integrity codes. This may lead to unauthorized message tampering.
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: none · Automatable: no · Technical impact: partial
- Record last updated
Affected versions
- krb5
fixed in 1.22
- krb5
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- krb5
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- krb5
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- krb5
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- krb5
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- krb5
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- krb5
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- krb5
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- krb5
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- krb5
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- krb5
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- krb5
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- krb5
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- krb5
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- krb5
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- discovery/discovery-server-rhel9
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- krb5
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- krb5
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- openshift/ose-rhel-coreos-8
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- openshift/ose-rhel-coreos-9
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