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CVE-2021-20271

Date: March 26, 2021

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.

Language: C

Severity Score

Related Resources (22)

https://security-tracker.debian.org/tracker/CVE-2021-20271
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VHRPNBCRPDJHHQE3MBPSZK4H7X2IM7AC/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TMGXO3W6DHPO62GJ4VVF5DEUX5DRUR5K/
https://bugzilla.redhat.com/show_bug.cgi?id=1934125
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TMGXO3W6DHPO62GJ4VVF5DEUX5DRUR5K/
https://security.gentoo.org/glsa/202107-43
https://security.alpinelinux.org/vuln/CVE-2021-20271
https://nvd.nist.gov/vuln/detail/CVE-2021-20271
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YILPBTPSBRYL4POBI3F4YUSVPSOQNJBY/
https://access.redhat.com/errata/RHBA-2021:2854
https://access.redhat.com/security/cve/CVE-2021-20271
https://github.com/rpm-software-management/rpm/commit/d6a86b5e69e46cc283b1e06c92343319beb42e21
https://access.redhat.com/errata/RHSA-2021:4785
https://access.redhat.com/errata/RHSA-2021:2574
https://people.canonical.com/~ubuntu-security/cve/CVE-2021-20271
https://www.starwindsoftware.com/security/sw-20220805-0002/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VHRPNBCRPDJHHQE3MBPSZK4H7X2IM7AC/
https://access.redhat.com/errata/RHSA-2021:2791
https://access.redhat.com/errata/RHSA-2021:4771
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/YILPBTPSBRYL4POBI3F4YUSVPSOQNJBY/
https://access.redhat.com/errata/RHSA-2021:4975
https://www.mend.io/vulnerability-database/CVE-2021-20271

Severity Score

Weakness Type (CWE)

Insufficient Verification of Data Authenticity

CWE-345

CVSS v3.1

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

CVSS v2

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

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