THREATPORT/VULNERABILITY/CVE-2019-15892
HIGH SEVERITY

CVE-2019-15892

Varnish Cache vulnerability

CVSS
7.5
EPSS
5.8%
EPSS pct
92th
Exploited
No known
An issue was discovered in Varnish Cache before 6.0.4 LTS, and 6.1.x and 6.2.x before 6.2.1. An HTTP/1 parsing failure allows a remote attacker to trigger an assert by sending crafted HTTP/1 requests. The assert will cause an automatic restart with a clean cache, which makes it a Denial of Service attack.
Affected vendor
Varnish Software
Affected product
Varnish Cache
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness type (CWE)
Published
2019-09-03

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 5.8% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 92% of all scored CVEs.

Check your external exposure to CVE-2019-15892

  • Confirm whether Varnish Software Varnish Cache is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2019-15892.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2019-15892

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2019-15892 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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