CVE & CISA-KEV Catalog

CVE-2021-31229

MEDIUM

6.5

CVSS v3

Description

An issue was discovered in libezxml.a in ezXML 0.8.6. The function ezxml_internal_dtd() performs incorrect memory handling while parsing crafted XML files, which leads to an out-of-bounds write of a one byte constant.

CWE-787Out-of-bounds Write

How to fix

Remediation Available

scilabUbuntu

Fixed in:5.5.2-2ubuntu3+esm1USN-5061-1

scilab-dataUbuntu

Fixed in:5.5.2-2ubuntu3+esm1USN-5061-1

scilab-full-binUbuntu

Fixed in:5.5.2-2ubuntu3+esm1USN-5061-1

scilab-minimal-binUbuntu

Fixed in:5.5.2-2ubuntu3+esm1USN-5061-1

scilab-testUbuntu

Fixed in:5.5.2-2ubuntu3+esm1USN-5061-1

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 InteractionRequired

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Exploit Intelligence

1.03%probability of exploitation in 30 days

60thpercentile

Moderate risk: more likely to be exploited than 60% of all known CVEs.

References

Patch1

sourceforge.net

Third-Party Advisory1

lists.debian.org

Related Vulnerabilities

Other CWE-787 (Out-of-bounds Write) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2025-22457	Critical	9.0	100%	KEV + Ransom	Fix
CVE-2025-0282	Critical	9.0	100%	KEV + Ransom	-
CVE-2015-3113	Critical	9.8	100%	KEV	Fix
CVE-2021-20038	Critical	9.8	100%	KEV + Ransom	-
CVE-2023-4863	High	8.8	100%	KEV	Fix
CVE-2020-16040	Medium	6.5	100%	-	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.