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CVE-2018-12384

Publication date 4 September 2018

Last updated 24 July 2024

Ubuntu priority

Low

Why this priority?

Cvss 3 Severity Score

5.9 · Medium

Score breakdown

When handling a SSLv2-compatible ClientHello request, the server doesn't generate a new random value but sends an all-zero value instead. This results in full malleability of the ClientHello for SSLv2 used for TLS 1.2 in all versions prior to NSS 3.39. This does not impact TLS 1.3.

Status

Package Ubuntu Release Status
nss 18.10 cosmic
Fixed 2:3.36.1-1ubuntu1.1
18.04 LTS bionic
Fixed 2:3.35-2ubuntu2.1
16.04 LTS xenial
Fixed 2:3.28.4-0ubuntu0.16.04.4
14.04 LTS trusty
Fixed 2:3.28.4-0ubuntu0.14.04.4

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
nss

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