CVE-2018-18311

CRITICALEPSS 96th pctl

9.8

CVSS v3

Description

Perl before 5.26.3 and 5.28.x before 5.28.1 has a buffer overflow via a crafted regular expression that triggers invalid write operations.

CWE-190Integer Overflow CWE-787Out-of-bounds Write

How to fix

Remediation Available

perlDebian

Fixed in:5.28.1-1CVE-2018-18311

perlUbuntu

Fixed in:5.18.2-2ubuntu1.7USN-3834-1

Fixed in:5.22.1-9ubuntu0.6USN-3834-1

Fixed in:5.26.1-6ubuntu0.3USN-3834-1

Strawberry PerlWindows application

Affected:5.26.3Fixed in:5.26.3strawberryperl.com project

Affected:5.28.0 5.28.1Fixed in:5.28.1strawberryperl.com project

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

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

11.67%probability of exploitation in 30 days

96thpercentile

Very high risk: more likely to be exploited than 96% of all known CVEs.

References

Related Vulnerabilities

Other CWE-190 (Integer Overflow) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2020-16040	Medium	6.5	100%	-	Fix
CVE-2019-11477	High	7.5	99%	-	Fix
CVE-2023-44443	High	7.8	94%	-	Fix
CVE-2014-0569	High	9.3	92%	-	-
CVE-2017-3599	High	7.5	84%	-	Fix
CVE-2023-21716	Critical	9.8	82%	-	Fix

Common questions

How do I fix CVE-2018-18311?

Published advisories record a fix for 3 affected products. The "How to fix" section on this page lists the fixed version and source advisory for each one, so apply the entry matching what you actually run.

Is CVE-2018-18311 being actively exploited?

Not that we know of. CVE-2018-18311 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 11.7% is the estimated probability that it will be exploited in the next 30 days. That is higher than 96% of all scored CVEs.

How severe is CVE-2018-18311?

CVE-2018-18311 has a CVSS v3 base score of 9.8, rated critical. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2018-18311 affect?

Published advisories record a fix for perl (Debian), perl (Ubuntu), Strawberry Perl (Windows application). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

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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.