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Vulnerability · Published May 28, 2021 · Assigned by mitre

CVE-2021-33620

Medium 6.5

In plain English

A medium-severity security flaw in the libecap package (AlmaLinux). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 79.6% (higher than 99.6% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)6.5Medium
Exploit odds (30 days)79.6%top 0.4% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known

Official description

Squid before 4.15 and 5.x before 5.0.6 allows remote servers to cause a denial of service (affecting availability to all clients) via an HTTP response. The issue trigger is a header that can be expected to exist in HTTP traffic without any malicious intent by the server.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:8libecap1.0.1-2.module_el8.6.0+2741+01592ae8ALSA-2021:4292
AlmaLinux:8libecap-devel1.0.1-2.module_el8.6.0+2741+01592ae8ALSA-2021:4292
AlmaLinux:8squid7:4.15-3.module_el8.6.0+3010+383bc947.1ALSA-2021:4292
Alpine:v3.20squid5.0.6-r0ALPINE-CVE-2021-33620
Alpine:v3.21squid5.0.6-r0ALPINE-CVE-2021-33620
Alpine:v3.22squid5.0.6-r0ALPINE-CVE-2021-33620
Alpine:v3.23squid5.0.6-r0ALPINE-CVE-2021-33620
Alpine:v3.24squid5.0.6-r0ALPINE-CVE-2021-33620
Debian:12squid4.13-10DEBIAN-CVE-2021-33620
Debian:13squid4.13-10DEBIAN-CVE-2021-33620
Debian:14squid4.13-10DEBIAN-CVE-2021-33620
Rocky Linux:8libecap0:1.0.1-2.module+el8.4.0+404+316a0dc5RLSA-2021:4292
Rocky Linux:8squid7:4.15-1.module+el8.5.0+705+218dec94RLSA-2021:4292

Affected products (as reported)

VendorProductVersions
n/a n/a n/a

References