Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Ruby-Lang | Openssl | < 2.0.0 |
| Debian | Debian Linux | 8.0 |
Related Weaknesses (CWE)
References
- http://www.openwall.com/lists/oss-security/2016/09/19/9Mailing ListThird Party Advisory
- http://www.openwall.com/lists/oss-security/2016/09/30/6Mailing ListPatchThird Party Advisory
- http://www.openwall.com/lists/oss-security/2016/10/01/2Mailing ListThird Party Advisory
- http://www.securityfocus.com/bid/93031Third Party AdvisoryVDB Entry
- https://github.com/ruby/openssl/commit/8108e0a6db133f3375608303fdd2083eb5115062PatchThird Party Advisory
- https://github.com/ruby/openssl/issues/49ExploitThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2018/07/msg00012.htmlMailing ListThird Party Advisory
- https://www.debian.org/security/2017/dsa-3966Third Party Advisory
- http://www.openwall.com/lists/oss-security/2016/09/19/9Mailing ListThird Party Advisory
- http://www.openwall.com/lists/oss-security/2016/09/30/6Mailing ListPatchThird Party Advisory
- http://www.openwall.com/lists/oss-security/2016/10/01/2Mailing ListThird Party Advisory
- http://www.securityfocus.com/bid/93031Third Party AdvisoryVDB Entry
- https://github.com/ruby/openssl/commit/8108e0a6db133f3375608303fdd2083eb5115062PatchThird Party Advisory
- https://github.com/ruby/openssl/issues/49ExploitThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2018/07/msg00012.htmlMailing ListThird Party Advisory
FAQ
What is CVE-2016-7798?
CVE-2016-7798 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 encrypt...
How severe is CVE-2016-7798?
CVE-2016-7798 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2016-7798?
Check the references section above for vendor advisories and patch information. Affected products include: Ruby-Lang Openssl, Debian Debian Linux.