CVE-2018-11763: apache software foundation apache http server
Vulnerability summary
CVE-2018-11763 is a medium (CVSS 5.9) vulnerability in apache software foundation apache http server. EPSS estimates a 50.85% chance of exploitation in the next 30 days, higher than 98.9% of scored vulnerabilities.
Not severe (CVSS 5.9, network access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 7 · Related 4Timeline
- 25-09-2018PublishedVulnerability first disclosed.
- 17-09-2024Last modifiedVulnerability information updated.
Description
In Apache HTTP Server 2.4.17 to 2.4.34, by sending continuous, large SETTINGS frames a client can occupy a connection, server thread and CPU time without any connection timeout coming to effect. This affects only HTTP/2 connections. A possible mitigation is to not enable the h2 protocol.
CVSS metrics
5 scores · 4 sources · 2 versions- OSV · AlpineEcosystem advisory · calculated5.9MediumCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · UbuntuEcosystem advisory · calculated5.9MediumCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated5.9MediumCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
50.85%
Chance of exploitation in the next 30 days
Percentile
99%
Versus all other CVEs
30-day change
No change 0.00 pp
From 50.85% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeNo weakness data has been published for this record.
Affected systems
Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Suse12 products
- apache2&distro=SUSE Enterprise Storage 4< 2.4.23-29.27.2
- apache2&distro=SUSE Linux Enterprise Module for Server Applications 15< 2.4.33-3.6.1
- apache2&distro=SUSE Linux Enterprise Server 12 SP2-BCL< 2.4.23-29.27.2
- apache2&distro=SUSE Linux Enterprise Server 12 SP2-LTSS< 2.4.23-29.27.2
- apache2&distro=SUSE Linux Enterprise Server 12 SP3< 2.4.23-29.27.2
Oracle5 products
- enterprise_manager_ops_center12.3.3
- hospitality_guest_access4.2.0 | 4.2.1
- instantis_enterprisetrack17.1 | 17.2 | 17.3
- retail_xstore_point_of_service7.0 | 7.1
- secure_global_desktop5.4
Alpine1 product
- apache2< 2.4.35-r0
Apache1 product
- http_server≥ 2.4.17, ≤ 2.4.34
Apache software foundation1 product
- apache http server2.4.17 to 2.4.34
Canonical1 product
- ubuntu_linuxEOL18.04
Debian1 product
- apache2< 2.4.35-1
Netapp1 product
Redhat1 product
- enterprise_linuxEOL6.0 | 7.0 | 7.4 | 7.5 | 7.6
Ubuntu1 product
- apache2< 2.4.29-1ubuntu4.4
10 vendors · 25 products
References
36 links- www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.htmlX Refsource CONFIRMPatchThird Party Advisory
- support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03909en_usX Refsource CONFIRMThird Party Advisory
Show all 36 references
- www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.htmlX Refsource MISCPatchThird Party Advisory
- www.tenable.com/security/tns-2019-09X Refsource CONFIRM
