CVE-2021-36386 — Missing Initialization of Resource in Fetchmail

CWE-909 — Missing Initialization of ResourceCWE-665 — Improper InitializationCWE-400 — Uncontrolled Resource Consumption6 documents6 sources
Severity
7.5HIGHNVD
EPSS
0.3%
top 50.69%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
4
FetchmailDebian FetchmailFedoraproject Fedora+1 more
Timeline
PublishedJul 30
Latest updateMay 24

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.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HExploitability: 3.9 | Impact: 3.6

Affected Packages4 packages

▶debiandebian/fetchmail< fetchmail 6.4.16-4 (bookworm)
▶NVDfetchmail/fetchmail< 6.4.20
▶Debianfetchmail/fetchmail< 6.4.16-4+2

Also affects: Fedora 33, 34

Patches

Patch: www.openwall.com ↗Patch: www.openwall.com ↗

🔴Vulnerability Details

2
GHSA
GHSA-rr6c-95pp-cpgf: report_vbuild in report↗2022-05-24
▶
OSV
CVE-2021-36386: report_vbuild in report↗2021-07-30
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📋Vendor Advisories

3
Red Hat
fetchmail: DoS or information disclosure when logging long messages↗2021-07-28
▶
Microsoft
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 unspe↗2021-07-13
▶
Debian
CVE-2021-36386: fetchmail - report_vbuild in report.c in Fetchmail before 6.4.20 sometimes omits initializat...↗2021
▶
CVE-2021-36386 — Missing Initialization of Resource | cvebase