CVE-2018-20615

Name: CVE-2018-20615
Creator: NVD / NIST
Published: 2019-03-21T16:00:36.297+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 4.46%

Last modified Jun 17, 2026

CVE-2018-20615 is a vulnerability of currently unknown severity. An out-of-bounds read issue was discovered in the HTTP/2 protocol decoder in HAProxy 1.8.x and 1.9.x through 1.9.0 which can result in a crash. The processing of the PRIORITY flag in a HEADERS frame requires 5 extra bytes, and while these bytes are skipped, the total frame length was not re-checked to make sure they were present in the frame.. EPSS estimates a 4.46% chance of exploitation in the next 30 days.

Description

An out-of-bounds read issue was discovered in the HTTP/2 protocol decoder in HAProxy 1.8.x and 1.9.x through 1.9.0 which can result in a crash. The processing of the PRIORITY flag in a HEADERS frame requires 5 extra bytes, and while these bytes are skipped, the total frame length was not re-checked to make sure they were present in the frame.

Metrics

EPSS Probability

4.46%

90.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-125

Affected Software

Vendor	Product	Versions
Haproxy	Haproxy	>= 1.8.0, <= 1.8.19
Haproxy	Haproxy	1.9.0
Opensuse	Leap	15.0
Canonical	Ubuntu Linux	16.04
Canonical	Ubuntu Linux	18.04
Canonical	Ubuntu Linux	18.10
Redhat	Openshift Container Platform	3.11
Redhat	Enterprise Linux	7.0
Redhat	Enterprise Linux	7.4
Redhat	Enterprise Linux	7.5
Redhat	Enterprise Linux	7.6

References

http://lists.opensuse.org/opensuse-security-announce/2019-02/msg00018.htmlMailing List, Third Party Advisory
http://www.securityfocus.com/bid/106645Third Party Advisory, VDB Entry
https://access.redhat.com/errata/RHBA-2019:0327Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:0275Third Party Advisory
https://usn.ubuntu.com/3858-1/Third Party Advisory
https://www.mail-archive.com/haproxy%40formilux.org/msg32304.html
http://lists.opensuse.org/opensuse-security-announce/2019-02/msg00018.htmlMailing List, Third Party Advisory
http://www.securityfocus.com/bid/106645Third Party Advisory, VDB Entry
https://access.redhat.com/errata/RHBA-2019:0327Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:0275Third Party Advisory
https://usn.ubuntu.com/3858-1/Third Party Advisory
https://www.mail-archive.com/haproxy%40formilux.org/msg32304.html

Timeline

Published: Mar 21, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-20615?

How severe is CVE-2018-20615?

Severity scoring for CVE-2018-20615 is pending analysis. The EPSS model estimates a 4.46% probability of exploitation in the next 30 days.

How do I fix CVE-2018-20615?

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.

Are you affected by CVE-2018-20615?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST