CVE-2018-8777

Exploitation

Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.

SSVC decision

Not assessed by CISA

EPSS probability

4.45% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 90.9% of scored records. A rank, not a probability.

NVD base score

7.5 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

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

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

Red Hat severity

Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2018-04-03 22:00Z8 YR AGO

Last updated

2024-08-05 07:02Z2 YR AGO

Reserved

2018-03-19

Assigning CNA

mitre

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-400Uncontrolled Resource ConsumptionClass

Data version

5.1

Document digest

fa4afa6033b63d8da6f09c861dc7d82d658cdea4127502ac44d753f9efe27b21

• www.ruby-lang.orghttps://www.ruby-lang.org/en/news/2018/03/28/large-request-dos-in-webrick-cve-2018-8777/x_refsource_CONFIRM
• usn.ubuntu.comUSN-3685-1https://usn.ubuntu.com/3685-1/vendor-advisoryx_refsource_UBUNTU
• www.ruby-lang.orghttps://www.ruby-lang.org/en/news/2018/03/28/ruby-2-5-1-released/x_refsource_CONFIRM
• www.securityfocus.com103683http://www.securityfocus.com/bid/103683vdb-entryx_refsource_BID
• access.redhat.comRHSA-2018:3729https://access.redhat.com/errata/RHSA-2018:3729vendor-advisoryx_refsource_REDHAT
• www.securitytracker.com1042004http://www.securitytracker.com/id/1042004vdb-entryx_refsource_SECTRACK
• access.redhat.comRHSA-2018:3730https://access.redhat.com/errata/RHSA-2018:3730vendor-advisoryx_refsource_REDHAT
• lists.debian.org[debian-lts-announce] 20180423 [SECURITY] [DLA 1358-1] ruby1.9.1 security updatehttps://lists.debian.org/debian-lts-announce/2018/04/msg00023.htmlmailing-listx_refsource_MLIST
• access.redhat.comRHSA-2018:3731https://access.redhat.com/errata/RHSA-2018:3731vendor-advisoryx_refsource_REDHAT
• www.ruby-lang.orghttps://www.ruby-lang.org/en/news/2018/03/28/ruby-2-3-7-released/x_refsource_CONFIRM
• lists.debian.org[debian-lts-announce] 20180714 [SECURITY] [DLA 1421-1] ruby2.1 security updatehttps://lists.debian.org/debian-lts-announce/2018/07/msg00012.htmlmailing-listx_refsource_MLIST
• www.ruby-lang.orghttps://www.ruby-lang.org/en/news/2018/03/28/ruby-2-4-4-released/x_refsource_CONFIRM
• www.debian.orgDSA-4259https://www.debian.org/security/2018/dsa-4259vendor-advisoryx_refsource_DEBIAN
• www.ruby-lang.orghttps://www.ruby-lang.org/en/news/2018/03/28/ruby-2-2-10-released/x_refsource_CONFIRM
• lists.debian.org[debian-lts-announce] 20180423 [SECURITY] [DLA 1359-1] ruby1.8 security updatehttps://lists.debian.org/debian-lts-announce/2018/04/msg00024.htmlmailing-listx_refsource_MLIST
• lists.opensuse.orgopenSUSE-SU-2019:1771http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00036.htmlvendor-advisoryx_refsource_SUSE
• access.redhat.comRHSA-2019:2028https://access.redhat.com/errata/RHSA-2019:2028vendor-advisoryx_refsource_REDHAT
• access.redhat.comRHSA-2020:0542https://access.redhat.com/errata/RHSA-2020:0542vendor-advisoryx_refsource_REDHAT
• access.redhat.comRHSA-2020:0591https://access.redhat.com/errata/RHSA-2020:0591vendor-advisoryx_refsource_REDHAT
• access.redhat.comRHSA-2020:0663https://access.redhat.com/errata/RHSA-2020:0663vendor-advisoryx_refsource_REDHAT