Critical
Security advisory
The finish_nested_data function in ext/standard/var_unserializer.re in PHP before 5.6.31, 7.0.x before 7.0.21, and 7.1.x before 7.1.7 is prone to a buffer over-read while unserializing untrusted data. Exploitation of this issue can have an unspecified impact on the integrity of PHP.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2017-12933
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 05:32 UTC · Revision 1
Source evidence
The finish_nested_data function in ext/standard/var_unserializer.re in PHP before 5.6.31, 7.0.x before 7.0.21, and 7.1.x before 7.1.7 is prone to a buffer over-read while unserializing untrusted data. Exploitation of this issue can have an unspecified impact on the integrity of PHP.
osv:CVE-2017-12933
Complete source record
{
"id": "c0aaa47f0d49e887ca4b748b977caf702db3226fc2c667e9abe52ac9c7b72465",
"url": "https://osv.dev/vulnerability/CVE-2017-12933",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2017-12933",
"summary": "The finish_nested_data function in ext/standard/var_unserializer.re in PHP before 5.6.31, 7.0.x before 7.0.21, and 7.1.x before 7.1.7 is prone to a buffer over-read while unserializing untrusted data. Exploitation of this issue can have an unspecified impact on the integrity of PHP.",
"evidence": "osv:CVE-2017-12933",
"products": [],
"severity": "critical",
"structured": {
"id": "CVE-2017-12933",
"aliases": [
"CVE-2017-12933"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/php/php-src",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"last_affected": "195427c55481d9913ac9dd3fbcedf2f7c637e6de"
},
{
"introduced": "60fffd296abce5fc071f3c173c25a2696cf683c6"
},
{
"last_affected": "5b34dc2d52841bfab425cbb24e9111172de20ef9"
}
],
"database_specific": {
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{
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"range": [
{
"introduced": "0"
},
{
"last_affected": "5.6.30"
}
],
"source": "CPE_RANGE"
},
{
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"range": [
{
"introduced": "7.0.0"
},
{
"last_affected": "7.0.0"
}
],
"source": "CPE_STRING"
},
{
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{
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}
],
"source": "CPE_STRING"
},
{
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"range": [
{
"introduced": "7.0.2"
},
{
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}
],
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},
{
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"introduced": "7.0.3"
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{
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}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:php:php:7.0.4:*:*:*:*:*:*:*",
"range": [
{
"introduced": "7.0.4"
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{
"last_affected": "7.0.4"
}
],
"source": "CPE_STRING"
},
{
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{
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{
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],
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},
{
"cpe": "cpe:2.3:a:php:php:7.0.7:*:*:*:*:*:*:*",
"range": [
{
"introduced": "7.0.7"
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{
"last_affected": "7.0.7"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:php:php:7.0.8:*:*:*:*:*:*:*",
"range": [
{
"introduced": "7.0.8"
},
{
"last_affected": "7.0.8"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:php:php:7.0.9:*:*:*:*:*:*:*",
"range": [
{
"introduced": "7.0.9"
},
{
"last_affected": "7.0.9"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:php:php:7.0.10:*:*:*:*:*:*:*",
"range": [
{
"introduced": "7.0.10"
},
{
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}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:php:php:7.0.11:*:*:*:*:*:*:*",
"range": [
{
"introduced": "7.0.11"
},
{
"last_affected": "7.0.11"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:php:php:7.0.12:*:*:*:*:*:*:*",
"range": [
{
"introduced": "7.0.12"
},
{
"last_affected": "7.0.12"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:php:php:7.0.13:*:*:*:*:*:*:*",
"range": [
{
"introduced": "7.0.13"
},
{
"last_affected": "7.0.13"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:php:php:7.0.14:*:*:*:*:*:*:*",
"range": [
{
"introduced": "7.0.14"
},
{
"last_affected": "7.0.14"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:php:php:7.0.15:*:*:*:*:*:*:*",
"range": [
{
"introduced": "7.0.15"
},
{
"last_affected": "7.0.15"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:php:php:7.0.16:*:*:*:*:*:*:*",
"range": [
{
"introduced": "7.0.16"
},
{
"last_affected": "7.0.16"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:php:php:7.0.17:*:*:*:*:*:*:*",
"range": [
{
"introduced": "7.0.17"
},
{
"last_affected": "7.0.17"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:php:php:7.0.18:*:*:*:*:*:*:*",
"range": [
{
"introduced": "7.0.18"
},
{
"last_affected": "7.0.18"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:php:php:7.0.19:*:*:*:*:*:*:*",
"range": [
{
"introduced": "7.0.19"
},
{
"last_affected": "7.0.19"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:php:php:7.0.20:*:*:*:*:*:*:*",
"range": [
{
"introduced": "7.0.20"
},
{
"last_affected": "7.0.20"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:php:php:7.1.0:*:*:*:*:*:*:*",
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{
"introduced": "7.1.0"
},
{
"last_affected": "7.1.0"
}
],
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},
{
"cpe": "cpe:2.3:a:php:php:7.1.1:*:*:*:*:*:*:*",
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{
"introduced": "7.1.1"
},
{
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}
],
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},
{
"cpe": "cpe:2.3:a:php:php:7.1.2:*:*:*:*:*:*:*",
"range": [
{
"introduced": "7.1.2"
},
{
"last_affected": "7.1.2"
}
],
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},
{
"cpe": "cpe:2.3:a:php:php:7.1.3:*:*:*:*:*:*:*",
"range": [
{
"introduced": "7.1.3"
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}
],
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},
{
"cpe": "cpe:2.3:a:php:php:7.1.4:*:*:*:*:*:*:*",
"range": [
{
"introduced": "7.1.4"
},
{
"last_affected": "7.1.4"
}
],
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},
{
"cpe": "cpe:2.3:a:php:php:7.1.5:*:*:*:*:*:*:*",
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{
"introduced": "7.1.5"
},
{
"last_affected": "7.1.5"
}
],
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},
{
"cpe": "cpe:2.3:a:php:php:7.1.6:*:*:*:*:*:*:*",
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{
"introduced": "7.1.6"
},
{
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}
],
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}
]
}
}
],
"versions": [
"7.0.0",
"7.0.1",
"7.0.10",
"7.0.11",
"7.0.12",
"7.0.13",
"7.0.14",
"7.0.15",
"7.0.16",
"7.0.17",
"7.0.18",
"7.0.19",
"7.0.2",
"7.0.20",
"7.0.3",
"7.0.4",
"7.0.5",
"7.0.6",
"7.0.7",
"7.0.8",
"7.0.9",
"7.1.0",
"7.1.1",
"7.1.2",
"7.1.3",
"7.1.4",
"7.1.5",
"7.1.6",
"php-7.1.6",
"php-7.1.6RC1",
"php-5.6.30",
"php-5.6.30RC1",
"POST_PHP7_NSAPI_REMOVAL",
"PRE_PHP7_NSAPI_REMOVAL",
"PRE_PHP7_EREG_MYSQL_REMOVALS",
"PRE_PHP7_REMOVALS",
"POST_PHP7_REMOVALS",
"POST_AST_MERGE",
"PRE_AST_MERGE",
"POST_64BIT_BRANCH_MERGE",
"PRE_64BIT_BRANCH_MERGE",
"POST_PHPNG_MERGE"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2017-12933.json"
}
}
],
"modified": "2026-10-24T10:30:30.001484886Z",
"provider": "osv",
"references": [
"https://usn.ubuntu.com/3566-1/",
"https://usn.ubuntu.com/3566-2/",
"https://access.redhat.com/errata/RHSA-2018:1296",
"https://bugs.php.net/bug.php?id=74111",
"https://www.debian.org/security/2018/dsa-4080",
"https://www.debian.org/security/2018/dsa-4081"
],
"provider_metadata": {}
},
"related_cves": [
{
"value": "CVE-2017-12933",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 432474,
"published_at": "2017-08-18T03:29:00.23+00:00"
}