DEBIAN-CVE-2026-63076
Issue summary: OpenSSL CMP password based protection verification only checks whether the protectionAlg parameter was not NULL and not its ASN.1 type, before treating it as a PBMParameter. A crafted message can contain a parameter of a different type, which is then dereferenced as an invalid pointer. Impact summary: A remote, unauthenticated attacker can crash an application acting as a CMP server that accepts PBM-protected messages, or a CMP client talking to a malicious or intercepted CMP server, resulting in a Denial of Service. CWE: CWE-476: NULL Pointer Dereference Description: When verifying the password-based MAC protection of a CMP message, OpenSSL library reads the protectionAlg algorithm parameter with X509_ALGOR_get0(), which returns both the parameter type and its value pointer. The value is then cast to an ASN1_STRING and treated as the expected PBMParameter after only checking that pointer is not NULL. The parameter type returned by X509_ALGOR_get0() was never consulted. This happens during protection verification, before any MAC is computed, so no knowledge of the PBM shared secret is required; the only precondition is that PBM verification is reachable. On the server side this is reached from OSSL_CMP_SRV_process_request() for any application that stands up a CMP server accepting PBM-protected messages, and on the client side from CMP response validation against a malicious or on-path (MITM) server. The reliable consequence is a denial of service; there is no
DEBIAN-CVE-2026-63076
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: osv:DEBIAN-CVE-2026-63076
openssl
Source reference: /affected/0/package/name
- Affected versions
- 3.0.10-1
Source reference:
/affected/0/versions3.0.10-1~deb12u1Source reference:
/affected/0/versions3.0.11-1Source reference:
/affected/0/versions3.0.11-1~deb12u1Source reference:
/affected/0/versions3.0.11-1~deb12u2Source reference:
/affected/0/versions3.0.12-1Source reference:
/affected/0/versions3.0.12-2Source reference:
/affected/0/versions3.0.13-1~deb12u1Source reference:
/affected/0/versions3.0.13-1~deb12u2Source reference:
/affected/0/versions3.0.14-1~deb12u1Source reference:
/affected/0/versions3.0.14-1~deb12u2Source reference:
/affected/0/versions3.0.15-1~deb12u1Source reference:
/affected/0/versions3.0.16-1~deb12u1Source reference:
/affected/0/versions3.0.17-1~deb12u1Source reference:
/affected/0/versions3.0.17-1~deb12u2Source reference:
/affected/0/versions3.0.17-1~deb12u3Source reference:
/affected/0/versions3.0.18-1~deb12u1Source reference:
/affected/0/versions3.0.18-1~deb12u2Source reference:
/affected/0/versions3.0.19-1~deb12u1Source reference:
/affected/0/versions3.0.19-1~deb12u2Source reference:
/affected/0/versions3.0.20-1~deb12u1Source reference:
/affected/0/versions3.0.20-1~deb12u2Source reference:
/affected/0/versions3.0.9-1Source reference:
/affected/0/versions - Fixed versions
- 3.0.22-1~deb12u1
Source reference:
/affected/0/ranges - Prerequisites
- Not stated in this record
openssl
Source reference: /affected/1/package/name
- Affected versions
- 3.5.1-1
Source reference:
/affected/1/versions3.5.1-1+deb13u1Source reference:
/affected/1/versions3.5.2-1Source reference:
/affected/1/versions3.5.3-1Source reference:
/affected/1/versions3.5.4-1Source reference:
/affected/1/versions3.5.4-1~deb13u1Source reference:
/affected/1/versions3.5.4-1~deb13u2Source reference:
/affected/1/versions3.5.5-1Source reference:
/affected/1/versions3.5.5-1~deb13u1Source reference:
/affected/1/versions3.5.5-1~deb13u2Source reference:
/affected/1/versions3.5.6-1~deb13u1Source reference:
/affected/1/versions3.5.6-1~deb13u2Source reference:
/affected/1/versions3.5.7-1~deb13u1Source reference:
/affected/1/versions - Fixed versions
- 3.5.7-1~deb13u2
Source reference:
/affected/1/ranges - Prerequisites
- Not stated in this record
openssl
Source reference: /affected/2/package/name
- Affected versions
- 3.5.1-1
Source reference:
/affected/2/versions3.5.2-1Source reference:
/affected/2/versions3.5.3-1Source reference:
/affected/2/versions3.5.4-1Source reference:
/affected/2/versions3.5.4-1~deb13u1Source reference:
/affected/2/versions3.5.4-1~deb13u2Source reference:
/affected/2/versions3.5.5-1Source reference:
/affected/2/versions3.5.5-1~deb13u1Source reference:
/affected/2/versions3.5.5-1~deb13u2Source reference:
/affected/2/versions3.5.6-1~deb13u1Source reference:
/affected/2/versions3.5.6-1~deb13u2Source reference:
/affected/2/versions3.5.7-1~deb13u1Source reference:
/affected/2/versions3.5.7-1~deb13u2Source reference:
/affected/2/versions3.5.7-1~deb13u3Source reference:
/affected/2/versions3.6.0-1Source reference:
/affected/2/versions3.6.0-2Source reference:
/affected/2/versions3.6.0~~alpha1-1Source reference:
/affected/2/versions3.6.0~~beta1-1Source reference:
/affected/2/versions3.6.1-1Source reference:
/affected/2/versions3.6.1-2Source reference:
/affected/2/versions3.6.1-3Source reference:
/affected/2/versions3.6.2-1Source reference:
/affected/2/versions3.6.3-1Source reference:
/affected/2/versions - Fixed versions
- 3.6.4-1
Source reference:
/affected/2/ranges - Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.0.22-1~deb12u1"
}
]
}
],
"package": {
"name": "openssl",
"purl": "pkg:deb/debian/openssl?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"3.0.10-1",
"3.0.10-1~deb12u1",
"3.0.11-1",
"3.0.11-1~deb12u1",
"3.0.11-1~deb12u2",
"3.0.12-1",
"3.0.12-2",
"3.0.13-1~deb12u1",
"3.0.13-1~deb12u2",
"3.0.14-1~deb12u1",
"3.0.14-1~deb12u2",
"3.0.15-1~deb12u1",
"3.0.16-1~deb12u1",
"3.0.17-1~deb12u1",
"3.0.17-1~deb12u2",
"3.0.17-1~deb12u3",
"3.0.18-1~deb12u1",
"3.0.18-1~deb12u2",
"3.0.19-1~deb12u1",
"3.0.19-1~deb12u2",
"3.0.20-1~deb12u1",
"3.0.20-1~deb12u2",
"3.0.9-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-63076.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.5.7-1~deb13u2"
}
]
}
],
"package": {
"name": "openssl",
"purl": "pkg:deb/debian/openssl?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"3.5.1-1",
"3.5.1-1+deb13u1",
"3.5.2-1",
"3.5.3-1",
"3.5.4-1",
"3.5.4-1~deb13u1",
"3.5.4-1~deb13u2",
"3.5.5-1",
"3.5.5-1~deb13u1",
"3.5.5-1~deb13u2",
"3.5.6-1~deb13u1",
"3.5.6-1~deb13u2",
"3.5.7-1~deb13u1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-63076.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.6.4-1"
}
]
}
],
"package": {
"name": "openssl",
"purl": "pkg:deb/debian/openssl?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"3.5.1-1",
"3.5.2-1",
"3.5.3-1",
"3.5.4-1",
"3.5.4-1~deb13u1",
"3.5.4-1~deb13u2",
"3.5.5-1",
"3.5.5-1~deb13u1",
"3.5.5-1~deb13u2",
"3.5.6-1~deb13u1",
"3.5.6-1~deb13u2",
"3.5.7-1~deb13u1",
"3.5.7-1~deb13u2",
"3.5.7-1~deb13u3",
"3.6.0-1",
"3.6.0-2",
"3.6.0~~alpha1-1",
"3.6.0~~beta1-1",
"3.6.1-1",
"3.6.1-2",
"3.6.1-3",
"3.6.2-1",
"3.6.3-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-63076.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #58108 · Revision 1
- Added to Heist Feed
- Publisher date