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Vulnerability details: VCID-67up-vtns-aaak
Vulnerability ID VCID-67up-vtns-aaak
Aliases CVE-2021-36386
Summary 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.
Status Published
Exploitability 0.5
Weighted Severity 6.8
Risk 3.4
Affected and Fixed Packages Package Details
Weaknesses (2)
CWE-909 Missing Initialization of Resource
CWE-665 Improper Initialization
System Score Found at
rhas Moderate https://access.redhat.com/errata/RHSA-2022:1964
cvssv3 7.5 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-36386.json
epss 0.0015 https://api.first.org/data/v1/epss?cve=CVE-2021-36386
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epss 0.00586 https://api.first.org/data/v1/epss?cve=CVE-2021-36386
rhbs medium https://bugzilla.redhat.com/show_bug.cgi?id=1987766
cvssv3.1 5.1 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv2 5.0 https://nvd.nist.gov/vuln/detail/CVE-2021-36386
cvssv3 7.5 https://nvd.nist.gov/vuln/detail/CVE-2021-36386
cvssv3.1 7.5 https://nvd.nist.gov/vuln/detail/CVE-2021-36386
archlinux Low https://security.archlinux.org/AVG-2238
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-36386.json
https://api.first.org/data/v1/epss?cve=CVE-2021-36386
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-36386
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
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://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OIXKO6QW3AUHGJVWKJXBCOVBYJUJRBFC/
https://security.gentoo.org/glsa/202209-14
https://www.fetchmail.info/fetchmail-SA-2021-01.txt
https://www.fetchmail.info/security.html
http://www.openwall.com/lists/oss-security/2021/07/28/5
http://www.openwall.com/lists/oss-security/2021/08/09/1
1987766 https://bugzilla.redhat.com/show_bug.cgi?id=1987766
AVG-2238 https://security.archlinux.org/AVG-2238
cpe:2.3:a:fetchmail:fetchmail:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:fetchmail:fetchmail:*:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
CVE-2021-36386 https://nvd.nist.gov/vuln/detail/CVE-2021-36386
RHSA-2022:1964 https://access.redhat.com/errata/RHSA-2022:1964
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-36386.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L Found at https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P Found at https://nvd.nist.gov/vuln/detail/CVE-2021-36386
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2021-36386
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2021-36386
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.32273
EPSS Score 0.0015
Published At April 8, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
There are no relevant records.