CVE-2017-17439

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Source
https://cve.org/CVERecord?id=CVE-2017-17439
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2017-17439.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2017-17439
Downstream
Related
Published
2017-12-06T15:29:00Z
Modified
2026-05-18T05:49:53Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
[none]
Details

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.

Database specific 
{
    "unresolved_ranges": [
        {
            "cpes": [
                "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*"
            ],
            "extracted_events": [
                {
                    "last_affected": "9.0"
                }
            ],
            "source": "CPE_FIELD",
            "vendor_product": "debian:debian_linux"
        }
    ]
}
References

Affected packages

Git / github.com/heimdal/heimdal

Affected ranges

Type
GIT
Repo
https://github.com/heimdal/heimdal
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Last Affected
a3d72c604378e0bff787cc426f2b17f75b112dce
Database specific
Show details 
{
    "cpe": "cpe:2.3:a:heimdal_project:heimdal:*:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "last_affected": "7.4.0"
        }
    ],
    "source": "CPE_FIELD"
}

Affected versions

Other
git2svn-syncpoint-master
switch-from-svn-to-git
heimdal-1.*
heimdal-1.3.0pre1
heimdal-1.3.0pre10
heimdal-1.3.0pre11
heimdal-1.3.0pre3
heimdal-1.3.0pre4
heimdal-1.3.0pre5
heimdal-1.3.0pre6
heimdal-1.3.0pre7
heimdal-1.3.0pre8
heimdal-1.3.0pre9
heimdal-1.3.0rc1
heimdal-1.5pre1
heimdal-1.5pre2
heimdal-7.*
heimdal-7.0.1
heimdal-7.0.2
heimdal-7.0.3
heimdal-7.1.0
heimdal-7.1rc1
heimdal-7.2.0
heimdal-7.3.0
heimdal-7.4.0
upstream-1.*
upstream-1.4.0+git20101228.dfsg.1
upstream-1.4.0+git20110220.dfsg.1

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2017-17439.json"