Medium
dnss — security advisory
DNSS Domain Name Search Software 2.1.8 contains a buffer overflow vulnerability in the registration code input field that allows local attackers to crash the application by submitting an excessively long string. Attackers can trigger a denial of service by pasting a malicious registration code containing 300 repeated characters into the Name/Key field via the Register menu option.
- Products
- dnss
- Affected versions
- 0.0~git20170810.0.860d2af1-1, 0.0~git20180721.0.2de63ab0-1, 0.0~git20200927.0.6aad832e-2, 0.0~git20200927.0.6aad832e-2build1, 0.0~git20200927.0.6aad832e-2ubuntu0.1, 0.0~git20200927.0.6aad832e-2ubuntu0.2, 0.0~git20200927.0.6aad832e-2ubuntu0.3, 0.0~git20200927.0.6aad832e-2ubuntu0.3+esm1, 0.0~git20200927.0.6aad832e-2ubuntu0.3+esm2, 0.0~git20230806.0.38ca607c-1build1, 0.0~git20230806.0.38ca607c-1ubuntu0.24.04.1, 0.0~git20230806.0.38ca607c-1ubuntu0.24.04.2, 0.0~git20230806.0.38ca607c-1ubuntu0.24.04.2+esm1, 0.0~git20230806.0.38ca607c-1ubuntu0.24.04.3, 0.0~git20230806.0.38ca607c-1ubuntu0.24.04.3+esm1, 0.0~git20230806.0.38ca607c-1ubuntu0.24.04.3+esm2, 0.1.0-1, 0.1.0-1build1
- Fixed versions
- Not specified
- CVEs
- CVE-2019-25591
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 00:50 UTC · Revision 1
Source evidence
DNSS Domain Name Search Software 2.1.8 contains a buffer overflow vulnerability in the registration code input field that allows local attackers to crash the application by submitting an excessively long string. Attackers can trigger a denial of service by pasting a malicious registration code containing 300 repeated characters into the Name/Key field via the Register menu option.
osv:UBUNTU-CVE-2019-25591
dnss
Fixed versions: Not specified
dnss
Fixed versions: Not specified
dnss
Fixed versions: Not specified
dnss
Fixed versions: Not specified
dnss
Fixed versions: Not specified
dnss
Fixed versions: Not specified
dnss
Fixed versions: Not specified
Complete source record
{
"id": "ecd129eb6fa60723f88acdae4f90f5da9b51c200d8bb7f5dd34be45cf938cadb",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2019-25591",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2019-25591",
"summary": "DNSS Domain Name Search Software 2.1.8 contains a buffer overflow vulnerability in the registration code input field that allows local attackers to crash the application by submitting an excessively long string. Attackers can trigger a denial of service by pasting a malicious registration code containing 300 repeated characters into the Name/Key field via the Register menu option.",
"evidence": "osv:UBUNTU-CVE-2019-25591",
"products": [
{
"name": {
"value": "dnss",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "0.0~git20170810.0.860d2af1-1",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
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"evidence": "/affected/1/package/name"
},
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"affected_versions": [
{
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"evidence": "/affected/1/versions"
}
]
},
{
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{
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"evidence": "/affected/2/versions"
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{
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"evidence": "/affected/2/versions"
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{
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"evidence": "/affected/2/versions"
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{
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"evidence": "/affected/2/versions"
},
{
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"evidence": "/affected/2/versions"
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{
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{
"name": {
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{
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"evidence": "/affected/3/versions"
},
{
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"evidence": "/affected/3/versions"
},
{
"value": "0.0~git20230806.0.38ca607c-1ubuntu0.24.04.2",
"evidence": "/affected/3/versions"
},
{
"value": "0.0~git20230806.0.38ca607c-1ubuntu0.24.04.2+esm1",
"evidence": "/affected/3/versions"
},
{
"value": "0.0~git20230806.0.38ca607c-1ubuntu0.24.04.3",
"evidence": "/affected/3/versions"
},
{
"value": "0.0~git20230806.0.38ca607c-1ubuntu0.24.04.3+esm1",
"evidence": "/affected/3/versions"
},
{
"value": "0.0~git20230806.0.38ca607c-1ubuntu0.24.04.3+esm2",
"evidence": "/affected/3/versions"
}
]
},
{
"name": {
"value": "dnss",
"evidence": "/affected/4/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "0.1.0-1",
"evidence": "/affected/4/versions"
}
]
},
{
"name": {
"value": "dnss",
"evidence": "/affected/5/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "0.1.0-1build1",
"evidence": "/affected/5/versions"
}
]
},
{
"name": {
"value": "dnss",
"evidence": "/affected/6/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "0.1.0-1",
"evidence": "/affected/6/versions"
},
{
"value": "0.1.0-1build1",
"evidence": "/affected/6/versions"
}
]
}
],
"severity": "medium",
"structured": {
"id": "UBUNTU-CVE-2019-25591",
"aliases": [
"UBUNTU-CVE-2019-25591"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
},
{
"type": "CVSS_V4",
"score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"
},
{
"type": "Ubuntu",
"score": "medium"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "dnss",
"purl": "pkg:deb/ubuntu/dnss?arch=source&distro=bionic",
"ecosystem": "Ubuntu:18.04:LTS"
},
"versions": [
"0.0~git20170810.0.860d2af1-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2019/UBUNTU-CVE-2019-25591.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "dnss",
"binary_version": "0.0~git20170810.0.860d2af1-1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
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}
]
}
],
"package": {
"name": "dnss",
"purl": "pkg:deb/ubuntu/dnss?arch=source&distro=focal",
"ecosystem": "Ubuntu:20.04:LTS"
},
"versions": [
"0.0~git20180721.0.2de63ab0-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2019/UBUNTU-CVE-2019-25591.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "dnss",
"binary_version": "0.0~git20180721.0.2de63ab0-1"
}
]
}
},
{
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],
"package": {
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"purl": "pkg:deb/ubuntu/dnss?arch=source&distro=esm-apps%2Fjammy",
"ecosystem": "Ubuntu:Pro:22.04:LTS"
},
"versions": [
"0.0~git20200927.0.6aad832e-2",
"0.0~git20200927.0.6aad832e-2build1",
"0.0~git20200927.0.6aad832e-2ubuntu0.1",
"0.0~git20200927.0.6aad832e-2ubuntu0.2",
"0.0~git20200927.0.6aad832e-2ubuntu0.3",
"0.0~git20200927.0.6aad832e-2ubuntu0.3+esm1",
"0.0~git20200927.0.6aad832e-2ubuntu0.3+esm2"
],
"database_specific": {
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"package": {
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"0.0~git20230806.0.38ca607c-1ubuntu0.24.04.1",
"0.0~git20230806.0.38ca607c-1ubuntu0.24.04.2",
"0.0~git20230806.0.38ca607c-1ubuntu0.24.04.2+esm1",
"0.0~git20230806.0.38ca607c-1ubuntu0.24.04.3",
"0.0~git20230806.0.38ca607c-1ubuntu0.24.04.3+esm1",
"0.0~git20230806.0.38ca607c-1ubuntu0.24.04.3+esm2"
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},
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"versions": [
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"ecosystem": "Ubuntu:26.04:LTS"
},
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],
"database_specific": {
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},
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}
],
"modified": "2026-10-17T12:56:08.495800390Z",
"provider": "osv",
"upstream": [
"CVE-2019-25591"
],
"references": [
"https://ubuntu.com/security/CVE-2019-25591",
"https://www.cve.org/CVERecord?id=CVE-2019-25591",
"https://www.exploit-db.com/exploits/46831",
"https://www.vulncheck.com/advisories/dnss-domain-name-search-software-denial-of-service"
]
},
"related_cves": [
{
"value": "CVE-2019-25591",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/1/score"
},
"source_id": "core-osv",
"document_id": 354873,
"published_at": "2026-03-22T14:16:00+00:00"
}