Medium
Security advisory
The get_client_master_key function in s2_srvr.c in the SSLv2 implementation in OpenSSL before 0.9.8zf, 1.0.0 before 1.0.0r, 1.0.1 before 1.0.1m, and 1.0.2 before 1.0.2a accepts a nonzero CLIENT-MASTER-KEY CLEAR-KEY-LENGTH value for an arbitrary cipher, which allows man-in-the-middle attackers to determine the MASTER-KEY value and decrypt TLS ciphertext data by leveraging a Bleichenbacher RSA padding oracle, a related issue to CVE-2016-0800.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2016-0703
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 05:01 UTC · Revision 1
Source evidence
The get_client_master_key function in s2_srvr.c in the SSLv2 implementation in OpenSSL before 0.9.8zf, 1.0.0 before 1.0.0r, 1.0.1 before 1.0.1m, and 1.0.2 before 1.0.2a accepts a nonzero CLIENT-MASTER-KEY CLEAR-KEY-LENGTH value for an arbitrary cipher, which allows man-in-the-middle attackers to determine the MASTER-KEY value and decrypt TLS ciphertext data by leveraging a Bleichenbacher RSA padding oracle, a related issue to CVE-2016-0800.
osv:CVE-2016-0703
Complete source record
{
"id": "82eb05f0d78c5d95f60365348b6cd20b61731c143358d387326697b25cf48470",
"url": "https://osv.dev/vulnerability/CVE-2016-0703",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2016-0703",
"summary": "The get_client_master_key function in s2_srvr.c in the SSLv2 implementation in OpenSSL before 0.9.8zf, 1.0.0 before 1.0.0r, 1.0.1 before 1.0.1m, and 1.0.2 before 1.0.2a accepts a nonzero CLIENT-MASTER-KEY CLEAR-KEY-LENGTH value for an arbitrary cipher, which allows man-in-the-middle attackers to determine the MASTER-KEY value and decrypt TLS ciphertext data by leveraging a Bleichenbacher RSA padding oracle, a related issue to CVE-2016-0800.",
"evidence": "osv:CVE-2016-0703",
"products": [],
"severity": "medium",
"structured": {
"id": "CVE-2016-0703",
"aliases": [
"CVE-2016-0703"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N"
}
],
"affected": [
{
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{
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{
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{
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{
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{
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{
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{
"cpe": "cpe:2.3:a:openssl:openssl:1.0.0:beta2:*:*:*:*:*:*",
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{
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{
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"versions": [
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"1.0.0-beta3",
"1.0.0-beta4",
"1.0.0-beta5",
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"OpenSSL_0_9_8zh",
"OpenSSL_0_9_8zg",
"OpenSSL_0_9_8zf",
"OpenSSL_0_9_8-post-reformat",
"OpenSSL_0_9_8-post-auto-reformat",
"OpenSSL_0_9_8-pre-auto-reformat",
"OpenSSL_0_9_8-pre-reformat",
"OpenSSL_0_9_8ze",
"OpenSSL_0_9_8zd",
"OpenSSL_0_9_8zc",
"OpenSSL_1_0_2-beta3",
"OpenSSL_0_9_8zb",
"OpenSSL_1_0_2-beta2",
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"OpenSSL_0_9_8y",
"OpenSSL_0_9_8x",
"OpenSSL_0_9_8w",
"OpenSSL_0_9_8v",
"OpenSSL_0_9_8u",
"OpenSSL_0_9_8t",
"OpenSSL_0_9_8s",
"OpenSSL_0_9_8r",
"OpenSSL_0_9_8q",
"OpenSSL_0_9_8p",
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"OpenSSL_0_9_8m",
"OpenSSL_0_9_8m-beta1",
"OpenSSL_0_9_8j",
"OpenSSL_0_9_8i",
"OpenSSL_0_9_8h",
"OpenSSL_0_9_8e",
"OpenSSL_0_9_8d",
"OpenSSL_0_9_8c",
"OpenSSL_0_9_8b",
"OpenSSL_0_9_8a",
"OpenSSL_0_9_8",
"OpenSSL_0_9_8-beta6",
"OpenSSL_0_9_8-beta5",
"OpenSSL_0_9_8-beta4",
"OpenSSL_0_9_8-beta2",
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],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2016-0703.json"
}
}
],
"modified": "2026-10-24T10:30:23.915362532Z",
"provider": "osv",
"references": [
"https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf",
"https://drownattack.com",
"https://git.openssl.org/?p=openssl.git%3Ba=commit%3Bh=ae50d8270026edf5b3c7f8aaa0c6677462b33d97",
"https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03741en_us",
"https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05141441",
"https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA40168",
"https://www.openssl.org/news/secadv/20160301.txt",
"https://security.FreeBSD.org/advisories/FreeBSD-SA-16:12.openssl.asc",
"https://security.gentoo.org/glsa/201603-15",
"https://www.arista.com/en/support/advisories-notices/security-advisories/1260-security-advisory-18"
],
"provider_metadata": {}
},
"related_cves": [
{
"value": "CVE-2016-0703",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 431034,
"published_at": "2016-03-02T11:59:00.113+00:00"
}