CVE-2024-36702: libiec61850 v1.5 was discovered to contain a heap overflow via the BerEncoder_encodeLength function at /asn1/b

Routine

HIGH 7.4DOWNGRADE

CVE-2024-36702 is a high-severity flaw (CVSS 7.4) affecting libiec61850. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

libiec61850 v1.5 was discovered to contain a heap overflow via the BerEncoder_encodeLength function at /asn1/ber_encoder.c.

Why this priority

High severity
Public exploit reference

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

Risk facts

CVSS score	7.4 (High)
Attack vector	Local
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	0.2% (top 84%)
CISA exploited list	No
Weakness	CWE-787, CWE-122
Published	2024-06-11
Last modified	2026-07-09

Publisher (CNA): MITRE · Vendor: mz-automation

Last updated 2026-07-09 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2024-06-11 19:16 UTCPublished CVE record published
2026-07-09 01:19 UTCUpdated Record last modified

mz-automation libiec61850 DOWNGRADE

Affected: 1.5

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.5

1. Check installed version

apt-cache policy libiec61850 || rpm -q libiec61850 || libiec61850 --version

2. No fixed release: DOWNGRADE to a release before 1.5 (Debian / Ubuntu)

apt-cache madison libiec61850 sudo apt install libiec61850=<VERSION_BEFORE_1.5> sudo apt-mark hold libiec61850

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

dnf --showduplicates list libiec61850 sudo dnf downgrade libiec61850-<VERSION_BEFORE_1.5> sudo dnf versionlock add libiec61850

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-2024-36702?

libiec61850: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2024-36702 being exploited?

CVE-2024-36702 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-2024-36702 affect?

CVE-2024-36702 affects libiec61850. Severity is high (CVSS 7.4). libiec61850 v1.5 was discovered to contain a heap overflow via the BerEncoder_encodeLength function at /asn1/ber_encoder.c.

How urgent is CVE-2024-36702?

Priority 35/100. High severity; Public exploit reference

Related CVEs

CVE-2024-45971 CRITICAL 9.8 UPGRADE Multiple Buffer overflows in the MMS Client in MZ Automation LibIEC61850 before commit 1f52be9ddeae00e69cd43e4
CVE-2024-45970 CRITICAL 9.8 UPGRADE Multiple Buffer overflows in the MMS Client in MZ Automation LibIEC61850 before commit ac925fae8e281ac6defcd63
CVE-2024-28286 HIGH 7.5 DOWNGRADE In mz-automation libiec61850 v1.4.0, a NULL Pointer Dereference was detected in the mmsServer_handleFileCloseR

References

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