Improper Input Validation Affecting varnish package, versions *


Severity

Recommended
0.0
medium
0
10

Snyk's Security Team recommends NVD's CVSS assessment. Learn more

Threat Intelligence

EPSS
13% (97th percentile)

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  • Snyk IDSNYK-ECHOLATEST-VARNISH-19883853
  • published17 Sept 2026
  • disclosed13 Jan 2010

Introduced: 13 Jan 2010

CVE-2009-4488  (opens in a new tab)
CWE-20  (opens in a new tab)

How to fix?

There is no fixed version for Echo:latest varnish.

NVD Description

Note: Versions mentioned in the description apply only to the upstream varnish package and not the varnish package as distributed by Echo. See How to fix? for Echo:latest relevant fixed versions and status.

Varnish 2.0.6 writes data to a log file without sanitizing non-printable characters, which might allow remote attackers to modify a window's title, or possibly execute arbitrary commands or overwrite files, via an HTTP request containing an escape sequence for a terminal emulator. NOTE: the vendor disputes the significance of this report, stating that "This is not a security problem in Varnish or any other piece of software which writes a logfile. The real problem is the mistaken belief that you can cat(1) a random logfile to your terminal safely.

CVSS Base Scores

version 3.1