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Vulnerability · Published Jul 29, 2021 · Assigned by mitre

CVE-2021-36386

High 7.5

In plain English

A high-severity security flaw in the fetchmail package (AlmaLinux). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 2.6% (higher than 85% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)7.5High
Exploit odds (30 days)2.6%top 14.8% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known

Official description

report_vbuild in report.c in Fetchmail before 6.4.20 sometimes omits initialization of the vsnprintf va_list argument, which might allow mail servers to cause a denial of service or possibly have unspecified other impact via long error messages. NOTE: it is unclear whether use of Fetchmail on any realistic platform results in an impact beyond an inconvenience to the client user.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:8fetchmail6.4.24-1.el8ALSA-2022:1964
Alpine:v3.20fetchmail6.4.20-r0ALPINE-CVE-2021-36386
Alpine:v3.21fetchmail6.4.20-r0ALPINE-CVE-2021-36386
Alpine:v3.22fetchmail6.4.20-r0ALPINE-CVE-2021-36386
Alpine:v3.23fetchmail6.4.20-r0ALPINE-CVE-2021-36386
Alpine:v3.24fetchmail6.4.20-r0ALPINE-CVE-2021-36386
Debian:12fetchmail6.4.16-4DEBIAN-CVE-2021-36386
Debian:13fetchmail6.4.16-4DEBIAN-CVE-2021-36386
Debian:14fetchmail6.4.16-4DEBIAN-CVE-2021-36386
Rocky Linux:8fetchmail0:6.4.24-1.el8RLSA-2022:1964

Affected products (as reported)

VendorProductVersions
n/a n/a n/a

References