CVE-2021-28662
MEDIUM
6.5
CVSS Score
Published: May 27, 2021 at 12:00 AM UTC
Updated: June 17, 2026 at 03:46 AM UTC
3 products affected across 3 vendorsDebian LinuxFedoraCache Squid
Using N/A by N/A?
Get instant alerts when new vulnerabilities affect N/A - before attackers find them.
Real-time alertsTrack your software stackFree plan available
Severity
MEDIUM6.5
Exploit prediction
EPSS 72%
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.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
Debian Linux· Debiandrupal
95%4.0.1 ≤ v < 4.155.0 ≤ v < 5.0.6
Affected range stops below 4.15, so it looks safe — our inference, not a vendor statement
Affected range stops below 5.0.6, so it looks safe — our inference, not a vendor statement
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
- http://www.squid-cache.org/Versions/v6/changesets/squid-6-051824924c709bd6162a378f746fb859454c674e.patch
- https://github.com/squid-cache/squid/commit/051824924c709bd6162a378f746fb859454c674e
- https://github.com/squid-cache/squid/security/advisories/GHSA-jjq6-mh2h-g39h
- 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/
References (8)
Mailing ListThird Party Advisory
Source: [email protected]
http://seclists.org/fulldisclosure/2023/Oct/14Mailing ListThird Party Advisory
Source: [email protected]
http://www.openwall.com/lists/oss-security/2023/10/11/3PatchThird Party Advisory
Source: [email protected]
https://github.com/squid-cache/squid/commit/051824924c709bd6162a378f746fb859454c674ePatchThird Party Advisory
Source: [email protected]
https://github.com/squid-cache/squid/security/advisories/GHSA-jjq6-mh2h-g39hVendor Advisoryx_refsource_FEDORA
Source: [email protected]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LSQ3U54ZCNXR44QRPW3AV2VCS6K3TKCF/Vendor Advisoryx_refsource_FEDORA
Source: [email protected]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/T4EPIWUZDJAXADDHVOPKRBTQHPBR6H66/Vendor AdvisoryThird Party Advisory
Source: [email protected]
https://www.debian.org/security/2021/dsa-4924CVSS
- Attack Vector
- NETWORK
- Complexity
- LOW
- Privileges
- NONE
- User Interaction
- REQUIRED
- Scope
- UNCHANGED
- Confidentiality
- NONE
- Integrity
- NONE
- Availability
- HIGH
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-116
Get alerted
Stop reading CVE feeds looking for your own stack
Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.
Free plan, no card