Description
An out-of-bounds read flaw was found in Samba's Kerberos Key Distribution Center's (KDC) password change (kpasswd) service. When processing malformed ASN.1-encoded Kerberos password change request, Samba server miscalculates the structure size and attempts to read up to six bytes beyond the end of the allocated buffer. While this out-of-bounds read typically results in a harmless decryption failure, if the read hits unmapped memory, it causes the KDC process to crash. An authenticated attacker can send a specially crafted kpasswd request containing malformed ASN.1 data to trigger the out-of-bounds read, which may cause the KDC process to terminate, resulting in a denial of service.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Red Hat Red Hat Enterprise Linux 10
Default version status: unknown
Red Hat Red Hat Enterprise Linux 6
Default version status: unknown
Red Hat Red Hat Enterprise Linux 6
Default version status: unknown
Red Hat Red Hat Enterprise Linux 7
Default version status: unknown
Red Hat Red Hat Enterprise Linux 8
Default version status: unknown
Red Hat Red Hat Enterprise Linux 9
Default version status: unknown
Red Hat Red Hat OpenShift Container Platform 4
Default version status: unknown