CVE-2016-0703

openssl: Divide-and-conquer session key recovery in SSLv2

Published Mar 2, 2016 CVSS 3.0 · 5.9 Medium EPSS 5.4% KEV · Not listed
Description
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2016-0738 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.
References
Link Providers
http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10759 cve-icon cve-icon
http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00001.html cve-icon cve-icon
http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00002.html cve-icon cve-icon
http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00003.html cve-icon cve-icon
http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00004.html cve-icon cve-icon
http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00006.html cve-icon cve-icon
http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00007.html cve-icon cve-icon
http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00009.html cve-icon cve-icon
http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00010.html cve-icon cve-icon
http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00012.html cve-icon cve-icon
http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00017.html cve-icon cve-icon
http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00025.html cve-icon cve-icon
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00038.html cve-icon cve-icon
http://openssl.org/news/secadv/20160301.txt cve-icon cve-icon
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160302-openssl cve-icon cve-icon
http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html cve-icon cve-icon
http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html cve-icon cve-icon
http://www.oracle.com/technetwork/topics/security/bulletinjan2016-2867206.html cve-icon cve-icon
http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html cve-icon cve-icon
http://www.securityfocus.com/bid/83743 cve-icon cve-icon
http://www.securitytracker.com/id/1035133 cve-icon cve-icon
https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf cve-icon cve-icon
https://drownattack.com cve-icon cve-icon
https://git.openssl.org/?p=openssl.git%3Ba=commit%3Bh=ae50d8270026edf5b3c7f8aaa0c6677462b33d97 cve-icon cve-icon
https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03741en_us cve-icon cve-icon
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05141441 cve-icon cve-icon
https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA40168 cve-icon cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2016-0703 cve-icon
https://security.FreeBSD.org/advisories/FreeBSD-SA-16:12.openssl.asc cve-icon cve-icon
https://security.gentoo.org/glsa/201603-15 cve-icon cve-icon
https://www.arista.com/en/support/advisories-notices/security-advisories/1260-security-advisory-18 cve-icon cve-icon
https://www.cve.org/CVERecord?id=CVE-2016-0703 cve-icon
https://www.openssl.org/news/secadv/20160301.txt cve-icon cve-icon cve-icon
History
Type Values Removed Values Added
Metrics epss

{'score': 0.05989}

epss

{'score': 0.05046}

Weaknesses

Sources

Status
PUBLISHED
Assigner
redhat
Published
Updated
Aug 5, 2024, 10:30 PM
Reserved
Dec 16, 2015, 12:00 AM
Status
Modified
Published
Mar 2, 2016, 11:59 AM
Modified
Jun 17, 2026, 12:38 AM
Severity
Moderate
Public date
Mar 1, 2016, 12:00 AM