CVE-2016-0702

Publication date 1 March 2016

Last updated 25 August 2025

Ubuntu priority

Low

Why this priority?

Cvss 3 Severity Score

5.1 · Medium

Score breakdown

Description

The MOD_EXP_CTIME_COPY_FROM_PREBUF function in crypto/bn/bn_exp.c in OpenSSL 1.0.1 before 1.0.1s and 1.0.2 before 1.0.2g does not properly consider cache-bank access times during modular exponentiation, which makes it easier for local users to discover RSA keys by running a crafted application on the same Intel Sandy Bridge CPU core as a victim and leveraging cache-bank conflicts, aka a "CacheBleed" attack.

Status

Package Ubuntu Release Status
openssl 19.04 disco
Fixed 1.0.2g-1ubuntu2
18.10 cosmic
Fixed 1.0.2g-1ubuntu2
18.04 LTS bionic
Fixed 1.0.2g-1ubuntu2
17.10 artful
Fixed 1.0.2g-1ubuntu2
17.04 zesty
Fixed 1.0.2g-1ubuntu2
16.10 yakkety
Fixed 1.0.2g-1ubuntu2
16.04 LTS xenial
Fixed 1.0.2g-1ubuntu2
15.10 wily
Fixed 1.0.2d-0ubuntu1.4
14.04 LTS trusty
Fixed 1.0.1f-1ubuntu2.18
12.04 LTS precise
Fixed 1.0.1-4ubuntu5.35
openssl098 19.04 disco Not in release
18.10 cosmic Not in release
18.04 LTS bionic Not in release
17.10 artful Not in release
17.04 zesty Not in release
16.10 yakkety Not in release
16.04 LTS xenial Not in release
15.10 wily Not in release
14.04 LTS trusty Not in release
12.04 LTS precise Ignored end of life

Severity score breakdown

Parameter Value
Base score 5.1 · Medium
Attack vector Local
Attack complexity High
Privileges required None
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact None
Availability impact None
Vector CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

References

Related Ubuntu Security Notices (USN)

Other references