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CVE-2016-0703

Publication date 1 March 2016

Last updated 24 July 2024


Ubuntu priority

Cvss 3 Severity Score

5.9 · Medium

Score breakdown

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.

Read the notes from the security team

Status

Package Ubuntu Release Status
openssl 15.10 wily
Not affected
15.04 vivid
Not affected
14.04 LTS trusty
Not affected
12.04 LTS precise
Not affected
openssl098 15.10 wily Not in release
15.04 vivid
Not affected
14.04 LTS trusty Not in release
12.04 LTS precise
Not affected

Notes


mdeslaur

openssl in Ubuntu is compiled with no-ssl2

Severity score breakdown

Parameter Value
Base score 5.9 · Medium
Attack vector Network
Attack complexity High
Privileges required None
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact None
Availability impact None
Vector CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N