CVE-2022-30273: The Motorola MDLC protocol through 2022-05-02 mishandles message integrity

This month

CRITICAL 9.8REMOTEDOWNGRADE

CVE-2022-30273 is a critical-severity flaw (CVSS 9.8) affecting mdlc. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The Motorola MDLC protocol through 2022-05-02 mishandles message integrity. It supports three security modes: Plain, Legacy Encryption, and New Encryption. In Legacy Encryption mode, traffic is encrypted via the Tiny Encryption Algorithm (TEA) block-cipher in ECB mode. This mode of operation does not offer message integrity and offers reduced confidentiality above the block level, as demonstrated by an ECB Penguin attack against any block ciphers

Why this priority

Critical severity
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 62%)
CISA exploited list	No
Weakness	CWE-327, CWE-345
Published	2022-07-26
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: motorolasolutions

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2022-07-26 22:15 UTCPublished CVE record published
2026-06-17 04:43 UTCUpdated Record last modified

motorolasolutions mdlc DOWNGRADE

Affected: 4.80.0024 · 4.82.004 · 4.83.001

Fixed in: no fixed release known

Safe to downgrade to: a release before 4.80.0024

1. Check installed version

apt-cache policy mdlc || rpm -q mdlc || mdlc --version

2. No fixed release: DOWNGRADE to a release before 4.80.0024 (Debian / Ubuntu)

apt-cache madison mdlc sudo apt install mdlc=<VERSION_BEFORE_4.80.0024> sudo apt-mark hold mdlc

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list mdlc sudo dnf downgrade mdlc-<VERSION_BEFORE_4.80.0024> sudo dnf versionlock add mdlc

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2022-30273?

mdlc: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2022-30273 being exploited?

CVE-2022-30273 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2022-30273 affect?

CVE-2022-30273 affects mdlc. Severity is critical (CVSS 9.8). The Motorola MDLC protocol through 2022-05-02 mishandles message integrity. It supports three security modes: Plain, Legacy Encryption, and New Encryption. In Legacy Encryption mode, traffic is encrypted via the Tiny Encryption Algorithm (T

How urgent is CVE-2022-30273?

Priority 49/100. Critical severity; Remotely exploitable, no login, no user action

Related CVEs

CVE-2022-30275 HIGH 7.5 DOWNGRADE The Motorola MOSCAD Toolbox software through 2022-05-02 relies on a cleartext password

References

← Back to latest CVEs