CVE-2018-18584

Cabextract vulnerability

CVSS

6.5

EPSS

3.1%

EPSS pct

86th

Exploited

No known

In mspack/cab.h in libmspack before 0.8alpha and cabextract before 1.8, the CAB block input buffer is one byte too small for the maximal Quantum block, leading to an out-of-bounds write.

Affected vendor

Cabextract Project

Affected product

Cabextract

CVSS vector

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

Weakness type (CWE)

CWE-787 — Out-of-bounds Write

Published

2018-10-23

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no privileges, user interaction. Successful exploitation leads to high impact to availability.

Its EPSS score of 3.1% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 86% of all scored CVEs.

Check your external exposure to CVE-2018-18584

Confirm whether Cabextract Project Cabextract is running on any internet-facing host or subdomain.
Match discovered service fingerprints against the version affected by CVE-2018-18584.
Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2018-18584

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2018-18584 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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