Описание
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.
Пакеты
| Пакет | Статус | Версия исправления | Релиз | Тип |
|---|---|---|---|---|
| krb5 | fixed | 1.21.2-1 | package | |
| krb5 | fixed | 1.20.1-2+deb12u4 | bookworm | package |
Примечания
https://bugzilla.redhat.com/show_bug.cgi?id=2359465
CVE relates to issues covered in:
https://i.blackhat.com/EU-22/Thursday-Briefings/EU-22-Tervoort-Breaking-Kerberos-RC4-Cipher-and-Spoofing-Windows-PACs-wp.pdf
Since upstream 1.21 (cf. https://web.mit.edu/kerberos/krb5-1.21/) the KDC
will no longer issue tickets with RC4 or triple-DES session keys unless
explicitly configured with the new allow_rc4 or allow_des3 variables respectively.
https://github.com/krb5/krb5/commit/1b57a4d134bbd0e7c52d5885a92eccc815726463
https://github.com/krb5/krb5/commit/2cbd847e0e92bc4e219b65c770ae33f851b22afc
Связанные уязвимости
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.
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.
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.
Krb5: kerberos rc4-hmac-md5 checksum vulnerability enabling message spoofing via md5 collisions
