HighFix available
nss — security advisory
A flaw was found in the way NSS handled CCS (ChangeCipherSpec) messages in TLS 1.3. This flaw allows a remote attacker to send multiple CCS messages, causing a denial of service for servers compiled with the NSS library. The highest threat from this vulnerability is to system availability. This flaw affects NSS versions before 3.58.
- Products
- nss
- Affected versions
- Not specified
- Fixed versions
- 3.58-r0
- CVEs
- CVE-2020-25648
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 12:08 UTC · Revision 1
Source evidence
A flaw was found in the way NSS handled CCS (ChangeCipherSpec) messages in TLS 1.3. This flaw allows a remote attacker to send multiple CCS messages, causing a denial of service for servers compiled with the NSS library. The highest threat from this vulnerability is to system availability. This flaw affects NSS versions before 3.58.
osv:ALPINE-CVE-2020-25648
nss
Fixed versions: 3.58-r0
nss
Fixed versions: 3.58-r0
nss
Fixed versions: 3.58-r0
nss
Fixed versions: 3.58-r0
nss
Fixed versions: 3.58-r0
nss
Fixed versions: 3.58-r0
nss
Fixed versions: 3.58-r0
Complete source record
{
"id": "90e550c8d778b70465f202faa340783ba5c7725f04cb08ec33dfda54b34348d9",
"url": "https://osv.dev/vulnerability/ALPINE-CVE-2020-25648",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "ALPINE-CVE-2020-25648",
"summary": "A flaw was found in the way NSS handled CCS (ChangeCipherSpec) messages in TLS 1.3. This flaw allows a remote attacker to send multiple CCS messages, causing a denial of service for servers compiled with the NSS library. The highest threat from this vulnerability is to system availability. This flaw affects NSS versions before 3.58.",
"evidence": "osv:ALPINE-CVE-2020-25648",
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},
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],
"modified": "2026-10-26T11:17:55.154886013Z",
"provider": "osv",
"upstream": [
"CVE-2020-25648"
],
"references": [
"https://security.alpinelinux.org/vuln/CVE-2020-25648"
]
},
"related_cves": [
{
"value": "CVE-2020-25648",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 450544,
"published_at": "2020-10-20T22:15:43.217+00:00"
}