UBUNTU-CVE-2017-17439
- Source
- https://ubuntu.com/security/CVE-2017-17439
- Import Source
- https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2017/UBUNTU-CVE-2017-17439.json
- JSON Data
- https://api.osv.dev/v1/vulns/UBUNTU-CVE-2017-17439
- Upstream
- Withdrawn
- 2025-07-18T16:44:16Z
- Published
- 2017-12-06T15:29:00Z
- Modified
- 2025-07-16T06:30:46.209935Z
- 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
- Ubuntu - medium
- 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 kdcasrep function in kdc/kerberos5.c and the derlengthvisiblestring function in lib/asn1/der_length.c.
- References
Affected packages
Ubuntu:18.04:LTS / heimdal
Package
- Name
- heimdal
- Purl
- pkg:deb/ubuntu/heimdal@7.5.0+dfsg-1?arch=source&distro=bionic
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0Unknown introduced version / All previous versions are affectedFixed7.5.0+dfsg-1
Ecosystem specific
{
"binaries": [
{
"binary_name": "heimdal-clients",
"binary_version": "7.5.0+dfsg-1"
},
{
"binary_name": "heimdal-clients-dbgsym",
"binary_version": "7.5.0+dfsg-1"
},
{
"binary_name": "heimdal-dev",
"binary_version": "7.5.0+dfsg-1"
},
{
"binary_name": "heimdal-docs",
"binary_version": "7.5.0+dfsg-1"
},
{
"binary_name": "heimdal-kcm",
"binary_version": "7.5.0+dfsg-1"
},
{
"binary_name": "heimdal-kcm-dbgsym",
"binary_version": "7.5.0+dfsg-1"
},
{
"binary_name": "heimdal-kdc",
"binary_version": "7.5.0+dfsg-1"
},
{
"binary_name": "heimdal-kdc-dbgsym",
"binary_version": "7.5.0+dfsg-1"
},
{
"binary_name": "heimdal-multidev",
"binary_version": "7.5.0+dfsg-1"
},
{
"binary_name": "heimdal-multidev-dbgsym",
"binary_version": "7.5.0+dfsg-1"
},
{
"binary_name": "heimdal-servers",
"binary_version": "7.5.0+dfsg-1"
},
{
"binary_name": "heimdal-servers-dbgsym",
"binary_version": "7.5.0+dfsg-1"
},
{
"binary_name": "libasn1-8-heimdal",
"binary_version": "7.5.0+dfsg-1"
},
{
"binary_name": "libasn1-8-heimdal-dbgsym",
"binary_version": "7.5.0+dfsg-1"
},
{
"binary_name": "libgssapi3-heimdal",
"binary_version": "7.5.0+dfsg-1"
},
{
"binary_name": "libgssapi3-heimdal-dbgsym",
"binary_version": "7.5.0+dfsg-1"
},
{
"binary_name": "libhcrypto4-heimdal",
"binary_version": "7.5.0+dfsg-1"
},
{
"binary_name": "libhcrypto4-heimdal-dbgsym",
"binary_version": "7.5.0+dfsg-1"
},
{
"binary_name": "libhdb9-heimdal",
"binary_version": "7.5.0+dfsg-1"
},
{
"binary_name": "libhdb9-heimdal-dbgsym",
"binary_version": "7.5.0+dfsg-1"
},
{
"binary_name": "libheimbase1-heimdal",
"binary_version": "7.5.0+dfsg-1"
},
{
"binary_name": "libheimbase1-heimdal-dbgsym",
"binary_version": "7.5.0+dfsg-1"
},
{
"binary_name": "libheimntlm0-heimdal",
"binary_version": "7.5.0+dfsg-1"
},
{
"binary_name": "libheimntlm0-heimdal-dbgsym",
"binary_version": "7.5.0+dfsg-1"
},
{
"binary_name": "libhx509-5-heimdal",
"binary_version": "7.5.0+dfsg-1"
},
{
"binary_name": "libhx509-5-heimdal-dbgsym",
"binary_version": "7.5.0+dfsg-1"
},
{
"binary_name": "libkadm5clnt7-heimdal",
"binary_version": "7.5.0+dfsg-1"
},
{
"binary_name": "libkadm5clnt7-heimdal-dbgsym",
"binary_version": "7.5.0+dfsg-1"
},
{
"binary_name": "libkadm5srv8-heimdal",
"binary_version": "7.5.0+dfsg-1"
},
{
"binary_name": "libkadm5srv8-heimdal-dbgsym",
"binary_version": "7.5.0+dfsg-1"
},
{
"binary_name": "libkafs0-heimdal",
"binary_version": "7.5.0+dfsg-1"
},
{
"binary_name": "libkafs0-heimdal-dbgsym",
"binary_version": "7.5.0+dfsg-1"
},
{
"binary_name": "libkdc2-heimdal",
"binary_version": "7.5.0+dfsg-1"
},
{
"binary_name": "libkdc2-heimdal-dbgsym",
"binary_version": "7.5.0+dfsg-1"
},
{
"binary_name": "libkrb5-26-heimdal",
"binary_version": "7.5.0+dfsg-1"
},
{
"binary_name": "libkrb5-26-heimdal-dbgsym",
"binary_version": "7.5.0+dfsg-1"
},
{
"binary_name": "libotp0-heimdal",
"binary_version": "7.5.0+dfsg-1"
},
{
"binary_name": "libotp0-heimdal-dbgsym",
"binary_version": "7.5.0+dfsg-1"
},
{
"binary_name": "libroken18-heimdal",
"binary_version": "7.5.0+dfsg-1"
},
{
"binary_name": "libroken18-heimdal-dbgsym",
"binary_version": "7.5.0+dfsg-1"
},
{
"binary_name": "libsl0-heimdal",
"binary_version": "7.5.0+dfsg-1"
},
{
"binary_name": "libsl0-heimdal-dbgsym",
"binary_version": "7.5.0+dfsg-1"
},
{
"binary_name": "libwind0-heimdal",
"binary_version": "7.5.0+dfsg-1"
},
{
"binary_name": "libwind0-heimdal-dbgsym",
"binary_version": "7.5.0+dfsg-1"
}
],
"availability": "No subscription required"
}