CVE-2020-36420

Name: CVE-2020-36420
Creator: NVD / NIST
Published: 2021-07-15T00:15:07.95+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 1.90%

Last modified Jun 17, 2026

CVE-2020-36420 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. Polipo through 1.1.1, when NDEBUG is omitted, allows denial of service via a reachable assertion during parsing of a malformed Range header. NOTE: This vulnerability only affects products that are no longer supported by the maintainer. EPSS estimates a 1.90% chance of exploitation in the next 30 days.

Description

Polipo through 1.1.1, when NDEBUG is omitted, allows denial of service via a reachable assertion during parsing of a malformed Range header. NOTE: This vulnerability only affects products that are no longer supported by the maintainer

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

1.90%

77.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-617

Affected Software

Vendor	Product	Versions
Polipo Project	Polipo	<= 1.1.1

References

http://www.openwall.com/lists/oss-security/2021/07/18/1Mailing List, Third Party Advisory
https://bugs.gentoo.org/755896Exploit, Issue Tracking, Patch, Third Party Advisory
https://github.com/jech/polipo/commit/4d42ca1b5849518762d110f34b6ce2e03d6df9ecPatch, Third Party Advisory
https://www.openwall.com/lists/oss-security/2020/11/18/1Exploit, Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/07/18/1Mailing List, Third Party Advisory
https://bugs.gentoo.org/755896Exploit, Issue Tracking, Patch, Third Party Advisory
https://github.com/jech/polipo/commit/4d42ca1b5849518762d110f34b6ce2e03d6df9ecPatch, Third Party Advisory
https://www.openwall.com/lists/oss-security/2020/11/18/1Exploit, Mailing List, Third Party Advisory

Timeline

Published: Jul 15, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-36420?

How severe is CVE-2020-36420?

CVE-2020-36420 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.90% probability of exploitation in the next 30 days.

How do I fix CVE-2020-36420?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-36420?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST