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Vulnerability details: VCID-y63j-ybs2-mfc9
Vulnerability ID VCID-y63j-ybs2-mfc9
Aliases CVE-2021-20271
Summary A flaw was found in RPM's signature check functionality when reading a package file. This flaw allows an attacker who can convince a victim to install a seemingly verifiable package, whose signature header was modified, to cause RPM database corruption and execute code. The highest threat from this vulnerability is to data integrity, confidentiality, and system availability.
Status Published
Exploitability 0.5
Weighted Severity 6.3
Risk 3.1
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-345 Insufficient Verification of Data Authenticity
System Score Found at
cvssv3 6.7 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-20271.json
epss 0.00197 https://api.first.org/data/v1/epss?cve=CVE-2021-20271
epss 0.00197 https://api.first.org/data/v1/epss?cve=CVE-2021-20271
epss 0.00197 https://api.first.org/data/v1/epss?cve=CVE-2021-20271
epss 0.00197 https://api.first.org/data/v1/epss?cve=CVE-2021-20271
epss 0.00197 https://api.first.org/data/v1/epss?cve=CVE-2021-20271
epss 0.00197 https://api.first.org/data/v1/epss?cve=CVE-2021-20271
epss 0.00197 https://api.first.org/data/v1/epss?cve=CVE-2021-20271
epss 0.00197 https://api.first.org/data/v1/epss?cve=CVE-2021-20271
epss 0.00197 https://api.first.org/data/v1/epss?cve=CVE-2021-20271
epss 0.00197 https://api.first.org/data/v1/epss?cve=CVE-2021-20271
epss 0.00197 https://api.first.org/data/v1/epss?cve=CVE-2021-20271
epss 0.00197 https://api.first.org/data/v1/epss?cve=CVE-2021-20271
epss 0.00197 https://api.first.org/data/v1/epss?cve=CVE-2021-20271
epss 0.00197 https://api.first.org/data/v1/epss?cve=CVE-2021-20271
epss 0.00197 https://api.first.org/data/v1/epss?cve=CVE-2021-20271
epss 0.00197 https://api.first.org/data/v1/epss?cve=CVE-2021-20271
epss 0.00197 https://api.first.org/data/v1/epss?cve=CVE-2021-20271
epss 0.00197 https://api.first.org/data/v1/epss?cve=CVE-2021-20271
epss 0.00197 https://api.first.org/data/v1/epss?cve=CVE-2021-20271
epss 0.00197 https://api.first.org/data/v1/epss?cve=CVE-2021-20271
epss 0.00197 https://api.first.org/data/v1/epss?cve=CVE-2021-20271
epss 0.00197 https://api.first.org/data/v1/epss?cve=CVE-2021-20271
epss 0.00197 https://api.first.org/data/v1/epss?cve=CVE-2021-20271
epss 0.00197 https://api.first.org/data/v1/epss?cve=CVE-2021-20271
epss 0.00197 https://api.first.org/data/v1/epss?cve=CVE-2021-20271
epss 0.00197 https://api.first.org/data/v1/epss?cve=CVE-2021-20271
epss 0.00197 https://api.first.org/data/v1/epss?cve=CVE-2021-20271
epss 0.00214 https://api.first.org/data/v1/epss?cve=CVE-2021-20271
epss 0.00214 https://api.first.org/data/v1/epss?cve=CVE-2021-20271
cvssv3.1 3.3 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv2 5.1 https://nvd.nist.gov/vuln/detail/CVE-2021-20271
cvssv3.1 7.0 https://nvd.nist.gov/vuln/detail/CVE-2021-20271
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-20271.json
https://api.first.org/data/v1/epss?cve=CVE-2021-20271
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-20271
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
https://github.com/rpm-software-management/rpm/commit/d6a86b5e69e46cc283b1e06c92343319beb42e21
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TMGXO3W6DHPO62GJ4VVF5DEUX5DRUR5K/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VHRPNBCRPDJHHQE3MBPSZK4H7X2IM7AC/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YILPBTPSBRYL4POBI3F4YUSVPSOQNJBY/
https://security.gentoo.org/glsa/202107-43
https://www.starwindsoftware.com/security/sw-20220805-0002/
1934125 https://bugzilla.redhat.com/show_bug.cgi?id=1934125
985308 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=985308
cpe:2.3:a:rpm:rpm:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:rpm:rpm:*:*:*:*:*:*:*:*
cpe:2.3:a:rpm:rpm:4.15.0:alpha:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:rpm:rpm:4.15.0:alpha:*:*:*:*:*:*
cpe:2.3:a:rpm:rpm:4.15.0:beta1:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:rpm:rpm:4.15.0:beta1:*:*:*:*:*:*
cpe:2.3:a:rpm:rpm:4.15.0:rc1:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:rpm:rpm:4.15.0:rc1:*:*:*:*:*:*
cpe:2.3:a:rpm:rpm:4.16.0:alpha:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:rpm:rpm:4.16.0:alpha:*:*:*:*:*:*
cpe:2.3:a:rpm:rpm:4.16.0:beta2:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:rpm:rpm:4.16.0:beta2:*:*:*:*:*:*
cpe:2.3:a:rpm:rpm:4.16.0:beta3:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:rpm:rpm:4.16.0:beta3:*:*:*:*:*:*
cpe:2.3:a:rpm:rpm:4.16.0:rc1:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:rpm:rpm:4.16.0:rc1:*:*:*:*:*:*
cpe:2.3:a:starwindsoftware:starwind_virtual_san:v8:build14398:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:starwindsoftware:starwind_virtual_san:v8:build14398:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*
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:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
CVE-2021-20271 https://nvd.nist.gov/vuln/detail/CVE-2021-20271
RHSA-2021:2574 https://access.redhat.com/errata/RHSA-2021:2574
RHSA-2021:2791 https://access.redhat.com/errata/RHSA-2021:2791
RHSA-2021:4771 https://access.redhat.com/errata/RHSA-2021:4771
RHSA-2021:4785 https://access.redhat.com/errata/RHSA-2021:4785
RHSA-2021:4975 https://access.redhat.com/errata/RHSA-2021:4975
USN-USN-5273-1 https://usn.ubuntu.com/USN-5273-1/
No exploits are available.
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-20271.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:H/PR:L/UI:R/S:U/C:N/I:L/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:H/Au:N/C:P/I:P/A:P Found at https://nvd.nist.gov/vuln/detail/CVE-2021-20271
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:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2021-20271
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 0.4204
EPSS Score 0.00197
Published At July 30, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-31T08:31:13.899614+00:00 Alpine Linux Importer Import https://secdb.alpinelinux.org/v3.15/community.json 37.0.0