ALAS2-2021-1689

Amazon Linux 2 Security Advisory: ALAS-2021-1689
Advisory Release Date: 2021-07-14 20:43 Pacific
Advisory Updated Date: 2021-07-15 21:39 Pacific
Severity: Medium
Issue Overview:

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. (CVE-2021-20271)

A flaw was found in the RPM package in the read functionality. This flaw allows an attacker who can convince a victim to install a seemingly verifiable package or compromise an RPM repository, to cause RPM database corruption. The highest threat from this vulnerability is to data integrity. (CVE-2021-3421)


Affected Packages:

rpm


Note:

This advisory is applicable to Amazon Linux 2 (AL2) Core repository. Visit this FAQ section for the difference between AL2 Core and AL2 Extras advisories.


Issue Correction:
Run yum update rpm to update your system.

New Packages:
aarch64:
    rpm-4.11.3-40.amzn2.0.6.aarch64
    rpm-libs-4.11.3-40.amzn2.0.6.aarch64
    rpm-build-libs-4.11.3-40.amzn2.0.6.aarch64
    rpm-devel-4.11.3-40.amzn2.0.6.aarch64
    rpm-build-4.11.3-40.amzn2.0.6.aarch64
    rpm-sign-4.11.3-40.amzn2.0.6.aarch64
    python2-rpm-4.11.3-40.amzn2.0.6.aarch64
    python3-rpm-4.11.3-40.amzn2.0.6.aarch64
    rpm-plugin-systemd-inhibit-4.11.3-40.amzn2.0.6.aarch64
    rpm-debuginfo-4.11.3-40.amzn2.0.6.aarch64

i686:
    rpm-4.11.3-40.amzn2.0.6.i686
    rpm-libs-4.11.3-40.amzn2.0.6.i686
    rpm-build-libs-4.11.3-40.amzn2.0.6.i686
    rpm-devel-4.11.3-40.amzn2.0.6.i686
    rpm-build-4.11.3-40.amzn2.0.6.i686
    rpm-sign-4.11.3-40.amzn2.0.6.i686
    python2-rpm-4.11.3-40.amzn2.0.6.i686
    python3-rpm-4.11.3-40.amzn2.0.6.i686
    rpm-plugin-systemd-inhibit-4.11.3-40.amzn2.0.6.i686
    rpm-debuginfo-4.11.3-40.amzn2.0.6.i686

noarch:
    rpm-apidocs-4.11.3-40.amzn2.0.6.noarch
    rpm-cron-4.11.3-40.amzn2.0.6.noarch

src:
    rpm-4.11.3-40.amzn2.0.6.src

x86_64:
    rpm-4.11.3-40.amzn2.0.6.x86_64
    rpm-libs-4.11.3-40.amzn2.0.6.x86_64
    rpm-build-libs-4.11.3-40.amzn2.0.6.x86_64
    rpm-devel-4.11.3-40.amzn2.0.6.x86_64
    rpm-build-4.11.3-40.amzn2.0.6.x86_64
    rpm-sign-4.11.3-40.amzn2.0.6.x86_64
    python2-rpm-4.11.3-40.amzn2.0.6.x86_64
    python3-rpm-4.11.3-40.amzn2.0.6.x86_64
    rpm-plugin-systemd-inhibit-4.11.3-40.amzn2.0.6.x86_64
    rpm-debuginfo-4.11.3-40.amzn2.0.6.x86_64

Additional References

Red Hat: CVE-2021-20271, CVE-2021-3421

Mitre: CVE-2021-20271, CVE-2021-3421