THREATPORT/VULNERABILITY/CVE-2019-18408
HIGH SEVERITY

CVE-2019-18408

Libarchive vulnerability

CVSS
7.5
EPSS
4.0%
EPSS pct
90th
Exploited
No known
archive_read_format_rar_read_data in archive_read_support_format_rar.c in libarchive before 3.4.0 has a use-after-free in a certain ARCHIVE_FAILED situation, related to Ppmd7_DecodeSymbol.
Affected vendor
Libarchive
Affected product
Libarchive
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness type (CWE)
Published
2019-10-24

Risk analysis

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

Its EPSS score of 4.0% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 90% of all scored CVEs.

Check your external exposure to CVE-2019-18408

  • Confirm whether Libarchive Libarchive is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2019-18408.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2019-18408

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2019-18408 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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