libcrypt-openssl-pkcs12-perl — security advisory
Crypt::OpenSSL::PKCS12 versions before 1.98 for Perl allow a NULL pointer dereference in print_attribute via a zero length BMPSTRING attribute. print_attribute() sizes the destination buffer for a BMPSTRING attribute from its declared byte length with `Renew(*attribute, length, char)`. A zero length attribute makes that a zero size reallocation, which Perl implements as a free returning NULL, so the buffer pointer becomes NULL, the following `strncpy` copies nothing, and the caller dereferences NULL in the `strlen()` it passes to `newSVpvn()`. A zero length BMPSTRING is even length, so the ASN.1 decoder accepts it and the value reaches this code. The UTF8STRING, OCTET STRING and BIT STRING arms size on `length + 1` or `length * 4 + 1` and are unaffected. Any caller that passes an untrusted PKCS#12 file to info_as_hash() can crash the process. info() prints attribute values directly without sizing a buffer and is unaffected.
- Products
- libcrypt-openssl-pkcs12-perl
- Affected versions
- 0.7-1, 0.7-1build1, 0.7-3ubuntu2, 0.8-1, 0.8-1build1, 1.2-1, 1.2-1build1, 1.9-2, 1.9-3, 1.9-3build1, 1.9-3build3, 1.9-3build4, 1.94-1, 1.95-1, 1.96-1, 1.97-1, 1.99-1
- Fixed versions
- Not specified
- CVEs
- CVE-2026-17510
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 01:07 UTC · Revision 1
Source evidence
Crypt::OpenSSL::PKCS12 versions before 1.98 for Perl allow a NULL pointer dereference in print_attribute via a zero length BMPSTRING attribute. print_attribute() sizes the destination buffer for a BMPSTRING attribute from its declared byte length with `Renew(*attribute, length, char)`. A zero length attribute makes that a zero size reallocation, which Perl implements as a free returning NULL, so the buffer pointer becomes NULL, the following `strncpy` copies nothing, and the caller dereferences NULL in the `strlen()` it passes to `newSVpvn()`. A zero length BMPSTRING is even length, so the ASN.1 decoder accepts it and the value reaches this code. The UTF8STRING, OCTET STRING and BIT STRING arms size on `length + 1` or `length * 4 + 1` and are unaffected. Any caller that passes an untrusted PKCS#12 file to info_as_hash() can crash the process. info() prints attribute values directly without sizing a buffer and is unaffected.
osv:UBUNTU-CVE-2026-17510
libcrypt-openssl-pkcs12-perl
Fixed versions: Not specified
libcrypt-openssl-pkcs12-perl
Fixed versions: Not specified
libcrypt-openssl-pkcs12-perl
Fixed versions: Not specified
libcrypt-openssl-pkcs12-perl
Fixed versions: Not specified
libcrypt-openssl-pkcs12-perl
Fixed versions: Not specified
libcrypt-openssl-pkcs12-perl
Fixed versions: Not specified
Complete source record
{
"id": "883e8d2068f2a918addb77eeaf1e719f072435d53cad8d35c4ba01042412e937",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-17510",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2026-17510",
"summary": "Crypt::OpenSSL::PKCS12 versions before 1.98 for Perl allow a NULL pointer dereference in print_attribute via a zero length BMPSTRING attribute. print_attribute() sizes the destination buffer for a BMPSTRING attribute from its declared byte length with `Renew(*attribute, length, char)`. A zero length attribute makes that a zero size reallocation, which Perl implements as a free returning NULL, so the buffer pointer becomes NULL, the following `strncpy` copies nothing, and the caller dereferences NULL in the `strlen()` it passes to `newSVpvn()`. A zero length BMPSTRING is even length, so the ASN.1 decoder accepts it and the value reaches this code. The UTF8STRING, OCTET STRING and BIT STRING arms size on `length + 1` or `length * 4 + 1` and are unaffected. Any caller that passes an untrusted PKCS#12 file to info_as_hash() can crash the process. info() prints attribute values directly without sizing a buffer and is unaffected.",
"evidence": "osv:UBUNTU-CVE-2026-17510",
"products": [
{
"name": {
"value": "libcrypt-openssl-pkcs12-perl",
"evidence": "/affected/0/package/name"
},
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{
"value": "0.7-1",
"evidence": "/affected/0/versions"
},
{
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{
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"evidence": "/affected/1/versions"
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{
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"affected_versions": [
{
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{
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"evidence": "/affected/2/versions"
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{
"name": {
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"evidence": "/affected/3/package/name"
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"affected_versions": [
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"evidence": "/affected/3/versions"
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{
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"evidence": "/affected/3/versions"
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{
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"evidence": "/affected/3/versions"
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{
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"evidence": "/affected/3/versions"
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{
"value": "1.9-3build4",
"evidence": "/affected/3/versions"
}
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{
"name": {
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"evidence": "/affected/4/package/name"
},
"prerequisites": [],
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"affected_versions": [
{
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"evidence": "/affected/4/versions"
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{
"value": "1.95-1",
"evidence": "/affected/4/versions"
},
{
"value": "1.96-1",
"evidence": "/affected/4/versions"
},
{
"value": "1.97-1",
"evidence": "/affected/4/versions"
},
{
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"evidence": "/affected/4/versions"
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]
},
{
"name": {
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"evidence": "/affected/5/package/name"
},
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"fixed_versions": [],
"affected_versions": [
{
"value": "1.94-1",
"evidence": "/affected/5/versions"
}
]
}
],
"severity": "high",
"structured": {
"id": "UBUNTU-CVE-2026-17510",
"aliases": [
"UBUNTU-CVE-2026-17510"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
},
{
"type": "Ubuntu",
"score": "medium"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "libcrypt-openssl-pkcs12-perl",
"purl": "pkg:deb/ubuntu/libcrypt-openssl-pkcs12-perl?arch=source&distro=xenial",
"ecosystem": "Ubuntu:16.04:LTS"
},
"versions": [
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"0.7-1build1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-17510.json"
},
"ecosystem_specific": {
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{
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"purl": "pkg:deb/ubuntu/libcrypt-openssl-pkcs12-perl?arch=source&distro=bionic",
"ecosystem": "Ubuntu:18.04:LTS"
},
"versions": [
"0.7-3ubuntu2",
"0.8-1",
"0.8-1build1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-17510.json"
},
"ecosystem_specific": {
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{
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{
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"package": {
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"purl": "pkg:deb/ubuntu/libcrypt-openssl-pkcs12-perl?arch=source&distro=focal",
"ecosystem": "Ubuntu:20.04:LTS"
},
"versions": [
"1.2-1",
"1.2-1build1"
],
"database_specific": {
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},
"ecosystem_specific": {
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"ecosystem": "Ubuntu:24.04:LTS"
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"versions": [
"1.9-2",
"1.9-3",
"1.9-3build1",
"1.9-3build3",
"1.9-3build4"
],
"database_specific": {
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"ecosystem_specific": {
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"binary_name": "libcrypt-openssl-pkcs12-perl",
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"ecosystem": "Ubuntu:26.10"
},
"versions": [
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"1.95-1",
"1.96-1",
"1.97-1",
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},
"ecosystem_specific": {
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"package": {
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"purl": "pkg:deb/ubuntu/libcrypt-openssl-pkcs12-perl?arch=source&distro=resolute",
"ecosystem": "Ubuntu:26.04:LTS"
},
"versions": [
"1.94-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-17510.json"
},
"ecosystem_specific": {
"binaries": [
{
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}
],
"modified": "2026-10-17T12:56:36.278781168Z",
"provider": "osv",
"upstream": [
"CVE-2026-17510"
],
"references": [
"https://ubuntu.com/security/CVE-2026-17510",
"https://www.cve.org/CVERecord?id=CVE-2026-17510",
"https://github.com/dsully/perl-crypt-openssl-pkcs12/commit/6cb282d8d8e8ded4859551cd2d3cfa7c6028ce48.patch",
"https://metacpan.org/release/JONASBN/Crypt-OpenSSL-PKCS12-1.98/source/Changes.md"
]
},
"related_cves": [
{
"value": "CVE-2026-17510",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 355836,
"published_at": "2026-08-09T02:16:00+00:00"
}