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CVE-2017-17439

CVE-2017-17439

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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.

CVSS 7.5 · High · EPSS 3.4% · Fix available

Published
Updated

Stack: system

Affected products and versions

  • n/a

    Versions
    • n/a: Affected

    No fix published

  • heimdal Debian:12

    Affected ranges
    • ECOSYSTEM: < 7.5.0+dfsg-1

    Update to 7.5.0+dfsg-1

  • heimdal Debian:13

    Affected ranges
    • ECOSYSTEM: < 7.5.0+dfsg-1

    Update to 7.5.0+dfsg-1

  • heimdal Debian:14

    Affected ranges
    • ECOSYSTEM: < 7.5.0+dfsg-1

    Update to 7.5.0+dfsg-1

Original sources

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