CVE-2016-3995
Publication date 13 February 2017
Last updated 25 August 2025
Ubuntu priority
Description
The timing attack protection in Rijndael::Enc::ProcessAndXorBlock and Rijndael::Dec::ProcessAndXorBlock in Crypto++ (aka cryptopp) before 5.6.4 may be optimized out by the compiler, which allows attackers to conduct timing attacks.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| libcrypto++ | 18.04 LTS bionic |
Not affected
|
| 16.04 LTS xenial |
Fixed 5.6.1-9ubuntu0.1
|
|
| 14.04 LTS trusty |
Fixed 5.6.1-6+deb8u3build0.14.04.1
|
|
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score |
7.5 · High
|
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | None |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | High |
| Integrity impact | None |
| Availability impact | None |
| Vector | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |