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.
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.718 (99.4th percentile), scored .
High probability of exploitation in the next 30 days — patch promptly. 99th percentile — 99.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.718 · newest: 0.718 · change: 0.000
Affected products
- Squid-Cache Squid
- Debian Linux — versions 10.0
- Fedoraproject Fedora — versions 33, 34
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/squid-cache/squid/security/advisories/GHSA-jjq6-mh2h-g39h (Patch, Third Party Advisory)
- github.com/squid-cache/squid/commit/051824924c709bd6162a378f746fb859454c674e (Patch, Third Party Advisory)
- www.squid-cache.org/Versions/v6/changesets/squid-6-051824924c709bd6162a378f746f… (Patch, Vendor Advisory)
- www.debian.org/security/2021/dsa-4924 (vendor-advisory, Third Party Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- www.openwall.com/lists/oss-security/2023/10/11/3 (mailing-list, Mailing List, Third Party Advisory)
- seclists.org/fulldisclosure/2023/Oct/14 (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.