CVE-2018-14642: red hat undertow
Vulnerability summary
CVE-2018-14642 is a medium (CVSS 5.3) vulnerability in red hat undertow. EPSS estimates a 2.11% chance of exploitation in the next 30 days, higher than 81.8% of scored vulnerabilities.
Not severe (CVSS 5.3, network access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 5Timeline
- 18-09-2018PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
Description
An information leak vulnerability was found in Undertow. If all headers are not written out in the first write() call then the code that handles flushing the buffer will always write out the full contents of the writevBuffer buffer, which may contain data from previous requests.
CVSS metrics
8 scores · 5 sources · 3 versions- OSV · UbuntuEcosystem advisory · calculated5.3MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
- OSV · DebianEcosystem advisory · calculated5.3MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
- OSV · MavenEcosystem advisory · calculated5.3MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
- NVDNIST5.3MediumCVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
- OSV · UbuntuEcosystem advisory · calculated5.3MediumCVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
EPSS trend
Probability
2.11%
Chance of exploitation in the next 30 days
Percentile
82%
Versus all other CVEs
30-day change
No change 0.00 pp
From 2.11% 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 causeAffected systems
Known conditions: network-reachable, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.
Redhat2 products
- jboss_enterprise_application_platform7.1 | 7.2 | 7.3
- undertowna
Debian1 product
- undertow< 2.0.23-1
Io.undertow1 product
- undertow-core< 2.0.19.FINAL
Red hat1 product
- undertown/a
Ubuntu1 product
- undertowAll versions (No fix recorded) | < 2.0.23-1
5 vendors · 6 products
References
14 links- bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-14642X Refsource CONFIRMIssue TrackingPatchVendor AdvisoryREPORTWEB
