Is CVE-2018-20103 in the CISA KEV catalog?

No. CVE-2018-20103 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2018-20103?

CVE-2018-20103 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2018-20103?

CVE-2018-20103 has an EPSS score of 6.59% (93th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2018-20103?

Upgrade haproxy on debian 11 to 1.8.15-1 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2018-20103

HIGHEPSS 93th pctl

7.5

CVSS v3

NVD

Description

An issue was discovered in dns.c in HAProxy through 1.8.14. In the case of a compressed pointer, a crafted packet can trigger infinite recursion by making the pointer point to itself, or create a long chain of valid pointers resulting in stack exhaustion.

CWE-835

How to fix

Remediation Available

haproxyDebian

Fixed in:1.8.15-1CVE-2018-20103

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

6.59%probability of exploitation in 30 days

93rdpercentile

High risk: more likely to be exploited than 93% of all known CVEs.

References

Third-Party Advisory4

Other references3

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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.