Vulnerability identifier: #VU54479

Vulnerability risk: Medium

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-3421

CWE-ID: CWE-347

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
rpm
/

Vendor: rpm-software-management

Description

The vulnerability allows a remote attacker to perform a denial of service attack.

The vulnerability exists due to insufficient signature validation in the read functionality n the RPM package. A remote attacker can trick the victim into installing a seemingly verifiable package and cause RPM database corruption.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

rpm: 4.16.0 alpha - 4.16.1.3

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External links
http://bugzilla.redhat.com/show_bug.cgi?id=1927747
http://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VHRPNBCRPDJHHQE3MBPSZK4H7X2IM7AC/
http://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/YILPBTPSBRYL4POBI3F4YUSVPSOQNJBY/
http://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TMGXO3W6DHPO62GJ4VVF5DEUX5DRUR5K/

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.