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Vulnerability · Published May 27, 2021 · Assigned by mitre

CVE-2021-31808

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 5.3% (higher than 93% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)6.5Medium
Exploit odds (30 days)5.3%top 7.3% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known

Official description

An issue was discovered in Squid before 4.15 and 5.x before 5.0.6. Due to an input-validation bug, it is vulnerable to a Denial of Service attack (against all clients using the proxy). A client sends an HTTP Range request to trigger this.

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-2021-31808
Alpine:v3.21squid5.0.6-r0ALPINE-CVE-2021-31808
Alpine:v3.22squid5.0.6-r0ALPINE-CVE-2021-31808
Alpine:v3.23squid5.0.6-r0ALPINE-CVE-2021-31808
Alpine:v3.24squid5.0.6-r0ALPINE-CVE-2021-31808
Debian:12squid4.13-10DEBIAN-CVE-2021-31808
Debian:13squid4.13-10DEBIAN-CVE-2021-31808
Debian:14squid4.13-10DEBIAN-CVE-2021-31808
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