Vulnerability in Squid-cache Squid
CVE-2021-28662
An issue was discovered in Squid 4.x before 4.15 and 5.x before 5.0.6. If a remote server sends a certain response header over HTTP or HTTPS, there is a denial of service. This header can plausibly occur in benign network traffic.
EPSS: 0.719 (99.4th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.
Affected products
- Squid-cache Squid
- Debian Debian_linux — versions 10.0
- 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, Third Party Advisory)
- cve@mitre.org (Patch, Vendor Advisory)
- cve@mitre.org (vendor-advisory, Third Party 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)
Frequently asked questions
- What is CVE-2021-28662?
- CVE-2021-28662 is a medium-severity vulnerability in Squid-cache Squid, classified under Improper Encoding or Escaping of Output. CVSS score: 6.5/10. Published 2021-05-27.
- How severe is CVE-2021-28662?
- Medium severity. CVSS v3 base score is 6.5 out of 10.
- Is CVE-2021-28662 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.