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Vulnerability · Published May 27, 2021 · Assigned by mitre

CVE-2021-31806

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 95.3% (higher than 99.9% of all known vulnerabilities). Ready-made attack tooling exists: Metasploit. Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)6.5Medium
Exploit odds (30 days)95.3%top 0.1% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack tooling1Metasploit

Official description

An issue was discovered in Squid before 4.15 and 5.x before 5.0.6. Due to a memory-management bug, it is vulnerable to a Denial of Service attack (against all clients using the proxy) via HTTP Range request processing.

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-2021-31806
Alpine:v3.21squid5.0.6-r0ALPINE-CVE-2021-31806
Alpine:v3.22squid5.0.6-r0ALPINE-CVE-2021-31806
Alpine:v3.23squid5.0.6-r0ALPINE-CVE-2021-31806
Alpine:v3.24squid5.0.6-r0ALPINE-CVE-2021-31806
Debian:12squid4.13-10DEBIAN-CVE-2021-31806
Debian:13squid4.13-10DEBIAN-CVE-2021-31806
Debian:14squid4.13-10DEBIAN-CVE-2021-31806
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