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    CVE-2021-21778

    A denial of service vulnerability exists in the ASDU message processing functionality of MZ Automation GmbH lib60870.NET 2.2.0. A specially crafted network request can lead to loss of communications. An attacker can send an unauthenticated message to trigger this vulnerability.

    Published:Aug 25, 2021
    Last Modified:Nov 21, 2024
    EPS:Aug 25, 2021
    EPSS Score:0.00533
    CVSS Score:7.5

    Affected Products

    Vendor
    Mz-automation
    Product
    Lib60870

    Exploits

    https://talosintelligence.com/vulnerability_reports/TALOS-2021-1236https://talosintelligence.com/vulnerability_reports/TALOS-2021-1236

    Common Weakness Enumeration

    CWE-617 Reachable Assertion

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

    CVE-2026-67873 (CVSS 9.8) — A heap-based buffer overflow exists in lib60870-C 2.4.0 in the server-side FileSegment ASDU encoding path. The…
    CVE-2026-61893 (CVSS 6.9) — A crafted IEC 60870-5-104 I-frame with TypeID 104 (C_TS_NA_1) and an inflated object count causes TestCommand…
    CVE-2026-63033 (CVSS 6.9) — A crafted IEC 60870-5-104 I-frame with a declared object count exceeding what fits in the ASDU body causes In…
    CVE-2026-16002 (CVSS 8.8) — The affected product is vulnerable to an Out-of-bounds read, which may allow an attacker to crash the parsing …
    CVE-2026-51219 (CVSS 7.5) — A heap buffer overflow in the HighPriorityASDUQueue_hasUnconfirmedIMessages function of lib60870 v2.3.3 to v2.…
    CVE-2024-45971 (CVSS 9.8) — Multiple Buffer overflows in the MMS Client in MZ Automation LibIEC61850 before commit 1f52be9ddeae00e69cd43e4…
    CVE-2024-45970 (CVSS 9.8) — Multiple Buffer overflows in the MMS Client in MZ Automation LibIEC61850 before commit ac925fae8e281ac6defcd63…
    CVE-2023-23205 (CVSS 5.5) — An issue was discovered in lib60870 v2.3.2. There is a memory leak in lib60870/lib60870-C/examples/multi_clien…
    CVE-2021-45773 (CVSS 7.5) — A NULL pointer dereference in CS104_IPAddress_setFromString at src/iec60870/cs104/cs104_slave.c of lib60870 co…
    CVE-2019-6137 (CVSS 7.5) — An issue was discovered in lib60870 2.1.1. LinkLayer_setAddress in link_layer/link_layer.c has a NULL pointer …

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High