Is CVE-2018-20615 in the CISA KEV catalog?

No. CVE-2018-20615 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2018-20615?

CVE-2018-20615 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2018-20615?

CVE-2018-20615 has an EPSS score of 4.46% (90th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2018-20615?

Upgrade haproxy on debian 11 to 1.8.16-2 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2018-20615

HIGHEPSS 90th pctl

7.5

CVSS v3

NVD

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.

CWE-125Out-of-bounds Read

How to fix

Remediation Available

haproxyDebian

Fixed in:1.8.16-2CVE-2018-20615

haproxyUbuntu

Fixed in:1.6.3-1ubuntu0.2USN-3858-1

Fixed in:1.8.8-1ubuntu0.3USN-3858-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Exploit Intelligence

4.46%probability of exploitation in 30 days

90thpercentile

High risk: more likely to be exploited than 90% of all known CVEs.

References

Third-Party Advisory5

Other references1

mail-archive.com

Related Vulnerabilities

Other CWE-125 (Out-of-bounds Read) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2014-0160	High	7.5	100%	KEV	Fix
CVE-2025-5777	High	7.5	100%	KEV + Ransom	Fix
CVE-2021-4034	High	7.8	95%	KEV	Fix
CVE-2023-21769	High	7.5	92%	-	Fix
CVE-2023-49285	High	8.6	89%	-	Fix
CVE-2020-8794	Critical	9.8	89%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.