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ALPINE-CVE-2021-28651

ALPINE-CVE-2021-28651 PUBLISHED CVSS 7.5 HIGH

An issue was discovered in Squid before 4.15 and 5.x before 5.0.6. Due to a buffer-management bug, it allows a denial of service. When resolving a request with the urn: scheme, the parser leaks a small amount of memory. However, there is an unspecified attack methodology that can easily trigger a large amount of memory consumption.

Risk Scores

CVSS v3.1
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected Products

VendorProductVersions
Alpine:v3.14squid3.2.0.12-r3, 3.2.0.12-r1, 3.4.8-r0
Alpine:v3.17squid3.5.8-r0, 5.0.5-r0, 5.0.4-r1
Alpine:v3.16squid4.11-r0, 4.10-r0, 3.5.8-r0
Alpine:v3.15squid2.7.7-r5, 2.7.9-r1, 2.7.9-r3
Alpine:v3.23squid2.7.7-r1, 2.7.6-r3, 2.7.6-r9
Alpine:v3.22squid3.5.17-r0, 3.5.16-r0, 3.5.15-r1
Alpine:v3.19squid5.0.5-r0, 3.4.6-r1, 3.4.6-r0
Alpine:v3.12squid2.7.6-r0, 2.7.6-r1, 2.7.6-r10
Alpine:v3.18squid3.4.12-r0, 2.7.6-r1, 2.7.6-r10
Alpine:v3.10squid0, 4.8-r1, 4.8-r0
Alpine:v3.13squid3.4.8-r0, 0, 2.7.6-r0
Alpine:v3.11squid3.5.7-r0, 3.5.8-r0, 4.10-r0
Alpine:v3.20squid0, 5.0.5-r0, 5.0.4-r1
Alpine:v3.21squid2.7.9-r3, 0, 2.7.6-r0

Timeline

  • May 27, 2021 CVE Published
  • Dec 3, 2025 CVE Updated
  • Apr 30, 2026 Distribution Patch
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