CVE-2018-14642
MEDIUMCVSS 5.3/10EPSS 2.11%
Last modified
CVE-2018-14642 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. 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.. EPSS estimates a 2.11% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Redhat | Undertow | All versions |
| Redhat | Jboss Enterprise Application Platform | 7.1 |
| Redhat | Jboss Enterprise Application Platform | 7.2 |
| Redhat | Jboss Enterprise Application Platform | 7.3 |
References
- https://access.redhat.com/errata/RHSA-2019:0362Vendor Advisory
- https://access.redhat.com/errata/RHSA-2019:0364Vendor Advisory
- https://access.redhat.com/errata/RHSA-2019:0365Vendor Advisory
- https://access.redhat.com/errata/RHSA-2019:0380Vendor Advisory
- https://access.redhat.com/errata/RHSA-2019:1106Vendor Advisory
- https://access.redhat.com/errata/RHSA-2019:1107Vendor Advisory
- https://access.redhat.com/errata/RHSA-2019:1108Vendor Advisory
- https://access.redhat.com/errata/RHSA-2019:1140Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-14642Issue Tracking, Patch, Vendor Advisory
- https://access.redhat.com/errata/RHSA-2019:0362Vendor Advisory
- https://access.redhat.com/errata/RHSA-2019:0364Vendor Advisory
- https://access.redhat.com/errata/RHSA-2019:0365Vendor Advisory
- https://access.redhat.com/errata/RHSA-2019:0380Vendor Advisory
- https://access.redhat.com/errata/RHSA-2019:1106Vendor Advisory
- https://access.redhat.com/errata/RHSA-2019:1107Vendor Advisory
- https://access.redhat.com/errata/RHSA-2019:1108Vendor Advisory
- https://access.redhat.com/errata/RHSA-2019:1140Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-14642Issue Tracking, Patch, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2018-14642?
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.
How severe is CVE-2018-14642?
CVE-2018-14642 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 2.11% probability of exploitation in the next 30 days.
How do I fix CVE-2018-14642?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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