CVE-2021-3521

Katalog CVE

CVSS 4.7 · Medium EPSS 0,32%

Kerentanan Improper Verification of Cryptographic Signature pada rpm. Skor CVSS 3.1 4.7 (Medium) menurut NVD.

Deskripsi (NVD)

There is a flaw in RPM's signature functionality. OpenPGP subkeys are associated with a primary key via a "binding signature." RPM does not check the binding signature of subkeys prior to importing them. If an attacker is able to add or socially engineer another party to add a malicious subkey to a legitimate public key, RPM could wrongly trust a malicious signature. The greatest impact of this flaw is to data integrity. To exploit this flaw, an attacker must either compromise an RPM repository or convince an administrator to install an untrusted RPM or public key. It is strongly recommended to only use RPMs and public keys from trusted sources.

Rincian

Terbit di NVD

22 Agustus 2022

Terakhir diubah

17 Juni 2026

Status NVD

Modified

CVSS 3.1

4.7 (Medium), sumber NVD
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-347: Improper Verification of Cryptographic Signature

EPSS (30 hari)

0,32% peluang dieksploitasi; lebih tinggi dari 23,3% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://bugzilla.redhat.com/show_bug.cgi?id=1941098 issue tracking · patch · advisory pihak ketiga
• https://github.com/rpm-software-management/rpm/commit/bd36c5dc9fb6d90c46fbfed8c2d67516fc571ec8 patch · advisory pihak ketiga
• https://github.com/rpm-software-management/rpm/pull/1795/ patch · advisory pihak ketiga
• https://access.redhat.com/security/cve/CVE-2021-3521 advisory pihak ketiga
• https://security.gentoo.org/glsa/202210-22 advisory pihak ketiga