CVE-2017-14064

high-risk
Published 2017-08-31

Ruby through 2.2.7, 2.3.x through 2.3.4, and 2.4.x through 2.4.1 can expose arbitrary memory during a JSON.generate call. The issues lies in using strdup in ext/json/ext/generator/generator.c, which will stop after encountering a '\0' byte, returning a pointer to a string of length zero, which is not the length stored in space_len.

Do I need to act?

~
1.2% chance of exploitation in next 30 days
EPSS score — moderate exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
9
CVSS 9.8/10 Critical
NETWORK / LOW complexity

Affected Products (20)

Affected Vendors

Redhat Ruby-Lang Debian Canonical

References (32)

Third Party Advisory http://www.securityfocus.com/bid/100890
Third Party Advisory http://www.securitytracker.com/id/1039363
Third Party Advisory http://www.securitytracker.com/id/1042004
Third Party Advisory https://access.redhat.com/errata/RHSA-2017:3485
Third Party Advisory https://access.redhat.com/errata/RHSA-2018:0378
Third Party Advisory https://access.redhat.com/errata/RHSA-2018:0583
Third Party Advisory https://access.redhat.com/errata/RHSA-2018:0585
Issue Tracking https://bugs.ruby-lang.org/issues/13853
Issue Tracking https://github.com/flori/json/commit/8f782fd8e181d9cfe9387ded43a5ca9692266b85
Exploit https://hackerone.com/reports/209949
Mailing List https://lists.debian.org/debian-lts-announce/2018/07/msg00012.html
Third Party Advisory https://security.gentoo.org/glsa/201710-18
Third Party Advisory https://usn.ubuntu.com/3685-1/
Third Party Advisory https://www.debian.org/security/2017/dsa-3966
Vendor Advisory https://www.ruby-lang.org/en/news/2017/09/14/ruby-2-2-8-released/
Vendor Advisory https://www.ruby-lang.org/en/news/2017/09/14/ruby-2-3-5-released/
Third Party Advisory http://www.securityfocus.com/bid/100890
Third Party Advisory http://www.securitytracker.com/id/1039363
Third Party Advisory http://www.securitytracker.com/id/1042004
Third Party Advisory https://access.redhat.com/errata/RHSA-2017:3485
and 12 more references
58
/ 100
high-risk
Severity 32/34 · Critical
Exploitability 4/34 · Minimal
Exposure 22/34 · High