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hackeroneDadrianH1:138179
HistoryMay 12, 2016 - 5:53 a.m.

Internet Bug Bounty: Divide-and-conquer session key recovery in SSLv2 (CVE-2016-0703)

2016-05-1205:53:22
dadrian
hackerone.com
33

5.9 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

4.3 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

AV:N/AC:M/Au:N/C:P/I:N/A:N

0.009 Low

EPSS

Percentile

81.2%

This is a retroactive submission of CVE-2016-0703, a.k.a. the “Extra Clear” bug, which can lead to the Special DROWN variant of the DROWN attack. After some discussion with the other DROWN authors, I’m submitting on behalf of myself (David Adrian) and J. Alex Halderman the vulnerability CVE-2016-0703, which was acknowledged by OpenSSL as Sev:High at https://www.openssl.org/news/secadv/20160301.txt.

5.9 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

4.3 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

AV:N/AC:M/Au:N/C:P/I:N/A:N

0.009 Low

EPSS

Percentile

81.2%