CVE-2013-4484: Varnish before 3.0.5 allows remote attackers to cause a denial of service (child-process crash and temporary c

Q: How do I fix CVE-2013-4484?

varnish: downgrade or apply the listed mitigation; varnish cache: upgrade to newer than 3.0.4. Exact commands for each OS are on this page.

Q: Is CVE-2013-4484 being exploited?

CVE-2013-4484 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2013-4484 affect?

CVE-2013-4484 affects varnish, varnish cache. Severity is medium (CVSS 5.0). Varnish before 3.0.5 allows remote attackers to cause a denial of service (child-process crash and temporary caching outage) via a GET request with trailing whitespace characters and no URI.

Q: How urgent is CVE-2013-4484?

Priority 45/100. Public exploit reference

This month

MEDIUM 5.0DOWNGRADEUPGRADE

CVE-2013-4484 is a medium-severity flaw (CVSS 5.0) affecting varnish, varnish cache. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Varnish before 3.0.5 allows remote attackers to cause a denial of service (child-process crash and temporary caching outage) via a GET request with trailing whitespace characters and no URI.

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	5.0 (Medium)
EPSS exploit chance	3.2% (top 12%)
CISA exploited list	No
Weakness	CWE-119
Published	2013-11-01
Last modified	2026-06-16

Publisher (CNA): Red Hat, Inc. · Vendor: varnish cache project · varnish-cache

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2013-11-01 02:55 UTCPublished CVE record published
2026-06-16 23:57 UTCUpdated Record last modified

varnish-cache varnish DOWNGRADE

Affected: 2.0.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.0.0

1. Check installed version

apt-cache policy varnish || rpm -q varnish || varnish --version

2. No fixed release: DOWNGRADE to a release before 2.0.0 (Debian / Ubuntu)

apt-cache madison varnish sudo apt install varnish=<VERSION_BEFORE_2.0.0> sudo apt-mark hold varnish

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list varnish sudo dnf downgrade varnish-<VERSION_BEFORE_2.0.0> sudo dnf versionlock add varnish

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

varnish cache project varnish cache UPGRADE

Affected: <= 3.0.4 · 2.0.1 · 2.0.2 · 2.0.3 · 2.0.4 · 2.0.5 · 2.0.6 · 2.1.0

Fixed in: newer than 3.0.4

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy varnish-cache || rpm -q varnish-cache || varnish-cache --version

2. UPGRADE to newer than 3.0.4 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade varnish-cache

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade varnish-cache

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2013-4484?

varnish: downgrade or apply the listed mitigation; varnish cache: upgrade to newer than 3.0.4. Exact commands for each OS are on this page.

Is CVE-2013-4484 being exploited?

CVE-2013-4484 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2013-4484 affect?

CVE-2013-4484 affects varnish, varnish cache. Severity is medium (CVSS 5.0). Varnish before 3.0.5 allows remote attackers to cause a denial of service (child-process crash and temporary caching outage) via a GET request with trailing whitespace characters and no URI.

How urgent is CVE-2013-4484?

Priority 45/100. Public exploit reference

Software pages

Varnish vulnerabilities

Related CVEs

CVE-2017-8807 CRITICAL 9.1 UPGRADE UPGRADE vbf_stp_error in bin/varnishd/cache/cache_fetch.c in Varnish HTTP Cache 4.1.x before 4.1.9 and 5.x before 5.2.
CVE-2017-12425 HIGH 7.5 DOWNGRADE DOWNGRADE An issue was discovered in Varnish HTTP Cache 4.0.1 through 4.0.4, 4.1.0 through 4.1.7, 5.0.0, and 5.1.0 throu
CVE-2013-0325 MEDIUM 4.3 DOWNGRADE Multiple cross-site scripting (XSS) vulnerabilities in the Varnish module 6.x-1.x before 6.x-1.2 and 7.x-1.x b

References

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