Improper input validation in Squid-cache Squid
CVE-2021-33620
Squid before 4.15 and 5.x before 5.0.6 allows remote servers to cause a denial of service (affecting availability to all clients) via an HTTP response. The issue trigger is a header that can be expected to exist in HTTP traffic without any…
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
EPSS: 0.796 (99.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Squid-cache Squid
- Debian Debian_linux — versions 9.0
- Fedoraproject Fedora — versions 33, 34
- N/a — versions n/a
Weakness classification (CWE)
Public proof-of-concept exploits
References
- cve@mitre.org (Patch, Third Party Advisory)
- cve@mitre.org (Patch, Mailing List, Vendor Advisory)
- cve@mitre.org (Patch, Mailing List, Vendor Advisory)
- cve@mitre.org (vendor-advisory)
- cve@mitre.org (vendor-advisory)
- cve@mitre.org (mailing-list, Mailing List, Third Party Advisory)
- cve@mitre.org (mailing-list, Mailing List, Third Party Advisory)
- cve@mitre.org (mailing-list, Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-33620?
- CVE-2021-33620 is a medium-severity vulnerability in Squid-cache Squid, classified under Improper Input Validation. CVSS score: 6.5/10. Published 2021-05-28.
- How severe is CVE-2021-33620?
- Medium severity. CVSS v3 base score is 6.5 out of 10.
- Is CVE-2021-33620 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.