CVE-2016-7798

MEDIUM

Description

The openssl gem for Ruby uses the same initialization vector (IV) in GCM Mode (aes-*-gcm) when the IV is set before the key, which makes it easier for context-dependent attackers to bypass the encryption protection mechanism.

References

http://www.openwall.com/lists/oss-security/2016/09/19/9

http://www.openwall.com/lists/oss-security/2016/09/30/6

http://www.openwall.com/lists/oss-security/2016/10/01/2

http://www.securityfocus.com/bid/93031

https://github.com/ruby/openssl/commit/8108e0a6db133f3375608303fdd2083eb5115062

https://github.com/ruby/openssl/issues/49

https://lists.debian.org/debian-lts-announce/2018/07/msg00012.html

https://www.debian.org/security/2017/dsa-3966

Details

Source: MITRE

Published: 2017-01-30

Updated: 2018-07-15

Type: CWE-310

Risk Information

CVSS v2.0

Base Score: 5

Vector: (AV:N/AC:L/Au:N/C:P/I:N/A:N)

Impact Score: 2.9

Exploitability Score: 10

Severity: MEDIUM

CVSS v3.0

Base Score: 7.5

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

Impact Score: 3.6

Exploitability Score: 3.9

Severity: HIGH