CVE-2017-0898

Public Exploit

Description

Ruby before 2.4.2, 2.3.5, and 2.2.8 is vulnerable to a malicious format string which contains a precious specifier (*) with a huge minus value. Such situation can lead to a buffer overrun, resulting in a heap memory corruption or an information disclosure from the heap.

Category

9.1
CVSS
Severity: Critical
CVSS 3.0 •
CVSS 2.0 •
EPSS 0.82% Top 30%
Vendor Advisory ubuntu.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory debian.org Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory gentoo.org Vendor Advisory ruby-lang.org
Affected: HackerOne Ruby
Published at:
Updated at:

References

Link Tags
https://usn.ubuntu.com/3685-1/ vendor advisory
https://hackerone.com/reports/212241 third party advisory exploit
https://access.redhat.com/errata/RHSA-2018:0585 vendor advisory
https://access.redhat.com/errata/RHSA-2018:0378 vendor advisory
https://www.debian.org/security/2017/dsa-4031 vendor advisory
http://www.securityfocus.com/bid/100862 vdb entry third party advisory
http://www.securitytracker.com/id/1039363 vdb entry third party advisory
https://access.redhat.com/errata/RHSA-2017:3485 vendor advisory
https://lists.debian.org/debian-lts-announce/2018/07/msg00012.html mailing list
https://access.redhat.com/errata/RHSA-2018:0583 vendor advisory
https://github.com/mruby/mruby/issues/3722 third party advisory exploit
https://www.ruby-lang.org/en/news/2017/09/14/sprintf-buffer-underrun-cve-2017-0898/ vendor advisory
https://security.gentoo.org/glsa/201710-18 vendor advisory

Frequently Asked Questions

What is the severity of CVE-2017-0898?
CVE-2017-0898 has been scored as a critical severity vulnerability.
How to fix CVE-2017-0898?
To fix CVE-2017-0898, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2017-0898 being actively exploited in the wild?
It is possible that CVE-2017-0898 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2017-0898?
CVE-2017-0898 affects HackerOne Ruby.
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