In Heimdal through 7.4, remote unauthenticated attackers are able to crash the KDC by sending a crafted UDP packet containing empty data fields for client name or realm. The parser would unconditionally dereference NULL pointers in that case, leading to a segmentation fault. This is related to the _kdc_as_rep function in kdc/kerberos5.c and the der_length_visible_string function in lib/asn1/der_length.c.
Metrics
Affected Vendors & Products
Advisories
Source | ID | Title |
---|---|---|
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DSA-4055-1 | heimdal security update |
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EUVD-2017-8603 | In Heimdal through 7.4, remote unauthenticated attackers are able to crash the KDC by sending a crafted UDP packet containing empty data fields for client name or realm. The parser would unconditionally dereference NULL pointers in that case, leading to a segmentation fault. This is related to the _kdc_as_rep function in kdc/kerberos5.c and the der_length_visible_string function in lib/asn1/der_length.c. |
Fixes
Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
References
History
No history.

Status: PUBLISHED
Assigner: mitre
Published:
Updated: 2024-08-05T20:51:31.511Z
Reserved: 2017-12-06T00:00:00
Link: CVE-2017-17439

No data.

Status : Deferred
Published: 2017-12-06T15:29:00.250
Modified: 2025-04-20T01:37:25.860
Link: CVE-2017-17439

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