What’s Vulnerable › Vulnerabilities

CVE-2022-25761: Denial of Service (DoS)

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-08-23 · updated 2026-06-17
• Weakness: CWE-770

Description

The package open62541/open62541 before 1.2.5, from 1.3-rc1 and before 1.3.1 are vulnerable to Denial of Service (DoS) due to a missing limitation on the number of received chunks - per single session or in total for all concurrent sessions. An attacker can exploit this vulnerability by sending an unlimited number of huge chunks (e.g. 2GB each) without sending the Final closing chunk.

Affected products

• Fedoraproject Fedora: 37
• open62541: before 1.2.5; 1.3-rc1, 1.3-rc2, 1.3-rc2-ef, 1.3-rc2-ef2 — fixed in 1.2.5

How to fix

Upgrade to a fixed version: open62541 1.2.5. Check the vendor advisory for mitigations.

References

• https://github.com/open62541/open62541/commit/b79db1ac78146fc06b0b8435773d3967de2d659c
• https://github.com/open62541/open62541/pull/5173
• https://github.com/open62541/open62541/releases/tag/v1.2.5
• https://github.com/open62541/open62541/releases/tag/v1.3.1
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JNUV4FDVDBQHCPMOOEVKLMQK5SLKPK2L/
• https://security.snyk.io/vuln/SNYK-UNMANAGED-OPEN62541OPEN62541-2988719
• https://github.com/open62541/open62541/commit/b79db1ac78146fc06b0b8435773d3967de2d659c
• https://github.com/open62541/open62541/pull/5173
• https://github.com/open62541/open62541/releases/tag/v1.2.5
• https://github.com/open62541/open62541/releases/tag/v1.3.1
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JNUV4FDVDBQHCPMOOEVKLMQK5SLKPK2L/
• https://security.snyk.io/vuln/SNYK-UNMANAGED-OPEN62541OPEN62541-2988719

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