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CVE-2021-36386

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Date: July 29, 2021

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.

Language: C

Severity Score

Related Resources (17)

https://nvd.nist.gov/vuln/detail/CVE-2021-36386
http://www.openwall.com/lists/oss-security/2021/08/09/1
https://security.alpinelinux.org/vuln/CVE-2021-36386
https://access.redhat.com/security/cve/CVE-2021-36386
https://security.gentoo.org/glsa/202209-14
https://www.fetchmail.info/security.html
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OIXKO6QW3AUHGJVWKJXBCOVBYJUJRBFC/
https://sourceforge.net/p/fetchmail/git/ci/c546c8299243a10a7b85c638e0e61396ecd5d8b5/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AGYO5AHSXTCKA4NQC2Z4H3XMMYNAGC77/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OIXKO6QW3AUHGJVWKJXBCOVBYJUJRBFC/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/AGYO5AHSXTCKA4NQC2Z4H3XMMYNAGC77/
https://security-tracker.debian.org/tracker/CVE-2021-36386
https://www.fetchmail.info/fetchmail-SA-2021-01.txt
https://people.canonical.com/~ubuntu-security/cve/CVE-2021-36386
https://security.archlinux.org/CVE-2021-36386
http://www.openwall.com/lists/oss-security/2021/07/28/5
https://www.mend.io/vulnerability-database/CVE-2021-36386

Severity Score

Weakness Type (CWE)

Uncontrolled Resource Consumption ('Resource Exhaustion')

CWE-400

Missing Initialization of Resource

CWE-909

Top Fix

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): HIGH

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): LOW
Authentication (AU): NONE
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): PARTIAL
Additional information:

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