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CVE search · CVE-2021-28543

CVE-2021-28543

high 7.5

Varnish varnish-modules before 0.17.1 allows remote attackers to cause a denial of service (daemon restart) in some configurations. This does not affect organizations that only install the Varnish Cache product; however, it is common to install both Varnish Cache and varnish-modules. Specifically, an assertion failure or NULL pointer dereference can be triggered in Varnish Cache through the varnish-modules header.append() and header.copy() functions. For some Varnish Configuration Language (VCL) files, this gives remote clients an opportunity to cause a Varnish Cache restart. A restart reduces overall availability and performance due to an increased number of cache misses, and may cause higher load on backend servers.

Open in the NVD CVE.org JSON

Details

Status
Modified
Published
Last changed
Source
cve@mitre.org
Weakness
CWE-476, CWE-617

Severity

VersionScoreVectorSource
CVSS 3.1 medium 4.0 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:L cve@mitre.orgSecondary
CVSS 3.1 high 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H nvd@nist.govPrimary
CVSS 2.0 medium 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P nvd@nist.govPrimary

Affected products

Vendor and product from the NVD’s CPE applicability statements. Versions and conditions are on the NVD’s page.

References