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Vulnerability Details : CVE-2021-20271

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.
Publish Date : 2021-03-26 Last Update Date : 2021-12-10
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- CVSS Scores & Vulnerability Types

CVSS Score
5.1
Confidentiality Impact Partial (There is considerable informational disclosure.)
Integrity Impact Partial (Modification of some system files or information is possible, but the attacker does not have control over what can be modified, or the scope of what the attacker can affect is limited.)
Availability Impact Partial (There is reduced performance or interruptions in resource availability.)
Access Complexity High (Specialized access conditions exist. It is hard to exploit and several special conditions must be satisfied to exploit)
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s) Execute Code
CWE ID 345

- Related OVAL Definitions

Title Definition Id Class Family
RHSA-2021:2574: rpm security update (Moderate) oval:com.redhat.rhsa:def:20212574 unix
RHSA-2021:4785: rpm security update (Moderate) oval:com.redhat.rhsa:def:20214785 unix
OVAL (Open Vulnerability and Assessment Language) definitions define exactly what should be done to verify a vulnerability or a missing patch. Check out the OVAL definitions if you want to learn what you should do to verify a vulnerability.

- Products Affected By CVE-2021-20271

# Product Type Vendor Product Version Update Edition Language
1 OS Fedoraproject Fedora 32 * * * Version Details Vulnerabilities
2 OS Fedoraproject Fedora 33 * * * Version Details Vulnerabilities
3 OS Fedoraproject Fedora 34 * * * Version Details Vulnerabilities
4 OS Redhat Enterprise Linux 8.0 * * * Version Details Vulnerabilities
5 Application RPM RPM * * * * Version Details Vulnerabilities
6 Application RPM RPM 4.15.0 Alpha * * Version Details Vulnerabilities
7 Application RPM RPM 4.15.0 Beta1 * * Version Details Vulnerabilities
8 Application RPM RPM 4.15.0 RC1 * * Version Details Vulnerabilities
9 Application RPM RPM 4.16.0 Alpha * * Version Details Vulnerabilities
10 Application RPM RPM 4.16.0 Beta2 * * Version Details Vulnerabilities
11 Application RPM RPM 4.16.0 Beta3 * * Version Details Vulnerabilities
12 Application RPM RPM 4.16.0 RC1 * * Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Fedoraproject Fedora 3
Redhat Enterprise Linux 1
RPM RPM 8

- References For CVE-2021-20271

https://security.gentoo.org/glsa/202107-43
GENTOO GLSA-202107-43
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/YILPBTPSBRYL4POBI3F4YUSVPSOQNJBY/
FEDORA FEDORA-2021-662680e477
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TMGXO3W6DHPO62GJ4VVF5DEUX5DRUR5K/
FEDORA FEDORA-2021-8d52a8a999
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VHRPNBCRPDJHHQE3MBPSZK4H7X2IM7AC/
FEDORA FEDORA-2021-2383d950fd
https://github.com/rpm-software-management/rpm/commit/d6a86b5e69e46cc283b1e06c92343319beb42e21
https://bugzilla.redhat.com/show_bug.cgi?id=1934125

- Metasploit Modules Related To CVE-2021-20271

There are not any metasploit modules related to this CVE entry (Please visit www.metasploit.com for more information)


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