Varnish Cache up to 6.0.3 LTS/6.1.x/6.2.0 HTTP1 Parser Request input validation

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Varnish Cache up to 6.0.3 LTS/6.1.x/6.2.0. Affected by this issue is some unknown functionality of the component HTTP1 Parser. Performing a manipulation as part of Request results in input validation. This vulnerability is cataloged as CVE-2019-15892. It is possible to initiate the attack remotely. There is no exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic has been found in Varnish Cache up to 6.0.3 LTS/6.1.x/6.2.0. This affects an unknown functionality of the component HTTP1 Parser. The manipulation as part of a Request leads to a input validation vulnerability. CWE is classifying the issue as CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. This is going to have an impact on availability. The summary by CVE is:

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.

The weakness was shared 09/03/2019 (Website). It is possible to read the advisory at seclists.org. This vulnerability is uniquely identified as CVE-2019-15892 since 09/03/2019. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. The technical details are unknown and an exploit is not publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 236666 (Alibaba Cloud Linux 3 : 0024: varnish:6 (ALINUX3-SA-2022:0024)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.0.4 LTS or 6.2.1 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (236666). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Vendor

• Varnish

Name

• Cache

Version

• 6.0
• 6.0.3 LTS
• 6.1
• 6.2.0

CPE 2.3info

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CPE 2.2info

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Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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