CVE-2018-8777

Description

In Ruby before 2.2.10, 2.3.x before 2.3.7, 2.4.x before 2.4.4, 2.5.x before 2.5.1, and 2.6.0-preview1, an attacker can pass a large HTTP request with a crafted header to WEBrick server or a crafted body to WEBrick server/handler and cause a denial of service (memory consumption).

Category

7.5
CVSS
Severity: High
CVSS 3.0 •
CVSS 2.0 •
EPSS 1.29% Top 25%
Vendor Advisory ubuntu.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory debian.org Vendor Advisory opensuse.org Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory ruby-lang.org Vendor Advisory ruby-lang.org Vendor Advisory ruby-lang.org Vendor Advisory ruby-lang.org Vendor Advisory ruby-lang.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://www.ruby-lang.org/en/news/2018/03/28/large-request-dos-in-webrick-cve-2018-8777/ vendor advisory
https://usn.ubuntu.com/3685-1/ third party advisory vendor advisory
https://www.ruby-lang.org/en/news/2018/03/28/ruby-2-5-1-released/ patch vendor advisory
http://www.securityfocus.com/bid/103683 vdb entry third party advisory
https://access.redhat.com/errata/RHSA-2018:3729 third party advisory vendor advisory
http://www.securitytracker.com/id/1042004 vdb entry third party advisory
https://access.redhat.com/errata/RHSA-2018:3730 third party advisory vendor advisory
https://lists.debian.org/debian-lts-announce/2018/04/msg00023.html third party advisory mailing list
https://access.redhat.com/errata/RHSA-2018:3731 third party advisory vendor advisory
https://www.ruby-lang.org/en/news/2018/03/28/ruby-2-3-7-released/ patch vendor advisory
https://lists.debian.org/debian-lts-announce/2018/07/msg00012.html third party advisory mailing list
https://www.ruby-lang.org/en/news/2018/03/28/ruby-2-4-4-released/ patch vendor advisory
https://www.debian.org/security/2018/dsa-4259 third party advisory vendor advisory
https://www.ruby-lang.org/en/news/2018/03/28/ruby-2-2-10-released/ patch vendor advisory
https://lists.debian.org/debian-lts-announce/2018/04/msg00024.html third party advisory mailing list
http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00036.html vendor advisory
https://access.redhat.com/errata/RHSA-2019:2028 vendor advisory
https://access.redhat.com/errata/RHSA-2020:0542 vendor advisory
https://access.redhat.com/errata/RHSA-2020:0591 vendor advisory
https://access.redhat.com/errata/RHSA-2020:0663 vendor advisory

Frequently Asked Questions

What is the severity of CVE-2018-8777?
CVE-2018-8777 has been scored as a high severity vulnerability.
How to fix CVE-2018-8777?
To fix CVE-2018-8777, 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-2018-8777 being actively exploited in the wild?
It is possible that CVE-2018-8777 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.
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