THREATPORT/VULNERABILITY/CVE-2019-17543
HIGH SEVERITY

CVE-2019-17543

Lz4 vulnerability

CVSS
8.1
EPSS
9.1%
EPSS pct
95th
Exploited
No known
LZ4 before 1.9.2 has a heap-based buffer overflow in LZ4_write32 (related to LZ4_compress_destSize), affecting applications that call LZ4_compress_fast with a large input. (This issue can also lead to data corruption.) NOTE: the vendor states "only a few specific / uncommon usages of the API are at risk."
Affected vendor
Lz4 Project
Affected product
Lz4
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness type (CWE)
Published
2019-10-14

Risk analysis

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

Its EPSS score of 9.1% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 95% of all scored CVEs.

Check your external exposure to CVE-2019-17543

  • Confirm whether Lz4 Project Lz4 is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2019-17543.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2019-17543

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2019-17543 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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