Is CVE-2018-1303 in the CISA KEV catalog?

No. CVE-2018-1303 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2018-1303?

CVE-2018-1303 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2018-1303?

CVE-2018-1303 has an EPSS score of 70.78% (99th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2018-1303?

Upgrade apache2 on debian 11 to 2.4.33-1 or later. Fixes are available for 3 affected products.

CVE & CISA-KEV Catalog

CVE-2018-1303

HIGHEPSS 99th pctl

7.5

CVSS v3

NVD

Description

A specially crafted HTTP request header could have crashed the Apache HTTP Server prior to version 2.4.30 due to an out of bound read while preparing data to be cached in shared memory. It could be used as a Denial of Service attack against users of mod_cache_socache. The vulnerability is considered as low risk since mod_cache_socache is not widely used, mod_cache_disk is not concerned by this vulnerability.

CWE-125Out-of-bounds Read

How to fix

Remediation Available

apache2Debian

Fixed in:2.4.33-1CVE-2018-1303

apache2Ubuntu

Fixed in:2.4.7-1ubuntu4.20USN-3627-1

Fixed in:2.4.18-2ubuntu3.8USN-3627-1

Fixed in:2.4.29-1ubuntu4.1USN-3627-2

apache2-binUbuntu

Fixed in:2.4.7-1ubuntu4.20USN-3627-1

Fixed in:2.4.18-2ubuntu3.8USN-3627-1

Fixed in:2.4.29-1ubuntu4.1USN-3627-2

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

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

70.78%probability of exploitation in 30 days

99thpercentile

Very high risk: more likely to be exploited than 99% of all known CVEs.

References

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-2020-8794	Critical	9.8	89%	-	Fix
CVE-2023-49285	High	8.6	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.