VulnerabilityModified
CVE-2021-28662
If a remote server sends a certain response header over HTTP or HTTPS, there is a denial of service.
MEDIUM 6.5EPSS 71.8%
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 71.8%, higher than 99% of all known CVEs. Patch or mitigate before the next change window.
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.
- CVSS 3.1
- 6.5 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
- EPSS
- 71.76% probability · 99th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-116
- Affected
- squid-cache/squid · debian/debian linux · fedoraproject/fedora
- Source
- cve@mitre.org
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
- http://www.squid-cache.org/Versions/v6/changesets/squid-6-051824924c709bd6162a378f746fb859454c674e.patchPatch, Vendor 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://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LSQ3U54ZCNXR44QRPW3AV2VCS6K3TKCF/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/T4EPIWUZDJAXADDHVOPKRBTQHPBR6H66/
- 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
- http://www.squid-cache.org/Versions/v6/changesets/squid-6-051824924c709bd6162a378f746fb859454c674e.patchPatch, Vendor 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://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LSQ3U54ZCNXR44QRPW3AV2VCS6K3TKCF/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/T4EPIWUZDJAXADDHVOPKRBTQHPBR6H66/
- https://www.debian.org/security/2021/dsa-4924Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.