CVE-2021-3521

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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.

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密码学签名的验证不恰当

Red Hat Enterprise Linux 数据伪造问题漏洞

Red Hat Enterprise Linux是美国红帽（Red Hat）公司的面向企业用户的Linux操作系统 Red Hat Enterprise Linux 存在数据伪造问题漏洞，该漏洞源于RPM的签名功能出现了错误。RPM在导入子项时，没有检查绑定签名。能够将恶意子密钥添加到合法公钥的远程攻击者可利用该漏洞可以在系统上运行恶意代码。

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