CVE-2021-28662
MEDIUMCVSS 6.5/10EPSS 71.87%
Last modified
CVE-2021-28662 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. 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. EPSS estimates a 71.87% chance of exploitation in the next 30 days.
Description
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Squid-Cache | Squid | >= 4.0.1, < 4.15 |
| Squid-Cache | Squid | >= 5.0, < 5.0.6 |
| Debian | Debian Linux | 10.0 |
| Fedoraproject | Fedora | 33 |
| Fedoraproject | Fedora | 34 |
References
- http://seclists.org/fulldisclosure/2023/Oct/14Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2023/10/11/3Mailing List, Third Party Advisory
- https://github.com/squid-cache/squid/commit/051824924c709bd6162a378f746fb859454c674ePatch, Third Party Advisory
- https://github.com/squid-cache/squid/security/advisories/GHSA-jjq6-mh2h-g39hPatch, Third Party Advisory
- https://www.debian.org/security/2021/dsa-4924Third Party Advisory
- http://seclists.org/fulldisclosure/2023/Oct/14Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2023/10/11/3Mailing List, Third Party Advisory
- https://github.com/squid-cache/squid/commit/051824924c709bd6162a378f746fb859454c674ePatch, Third Party Advisory
- https://github.com/squid-cache/squid/security/advisories/GHSA-jjq6-mh2h-g39hPatch, Third Party Advisory
- https://www.debian.org/security/2021/dsa-4924Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is 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.
How severe is CVE-2021-28662?
CVE-2021-28662 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 71.87% probability of exploitation in the next 30 days.
How do I fix CVE-2021-28662?
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-2021-28662?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST