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    CVE-2020-13556

    An out-of-bounds write vulnerability exists in the Ethernet/IP server functionality of EIP Stack Group OpENer 2.3 and development commit 8c73bf3. A specially crafted series of network requests can lead to remote code execution. An attacker can send a sequence of requests to trigger this vulnerability.

    Published:Dec 11, 2020
    Last Modified:Nov 21, 2024
    EPS:Dec 11, 2020
    EPSS Score:0.02647
    CVSS Score:9.8

    Affected Products

    Vendor
    Opener Project
    Product
    Opener

    Exploits

    https://talosintelligence.com/vulnerability_reports/TALOS-2020-1170https://talosintelligence.com/vulnerability_reports/TALOS-2020-1170

    Common Weakness Enumeration

    CWE-787 Out-of-bounds Write

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

    CVE-2026-51538 (CVSS 9.1) — EIPStackGroup OpENer 2.3.0 (commit 76b95cf) suffers from an Incorrect Access Control vulnerability in its hand…
    CVE-2026-51537 (CVSS 9.1) — EIPStackGroup OpENer 2.3.0 (commit 76b95cf) has an out-of-bounds read issue in Connection Manager handling of …
    CVE-2026-51536 (CVSS 9.1) — In OpENer 2.3.0 (commit 76b95cf) when parsing incoming CIP (Common Industrial Protocol) network packets, the l…
    CVE-2026-51541 (CVSS 9.1) — OpENer 2.3.0 (commit 76b95cf) has an out-of-bounds read issue in CIP message parsing when handling malformed e…
    CVE-2026-51540 (CVSS 9.8) — OpENer 2.3.0 (master branch up to commit 76b95cf) is vulnerable to a severe memory corruption issue caused by …
    CVE-2022-43605 (CVSS 10) — An out-of-bounds write vulnerability exists in the SetAttributeList attribute_count_request functionality of E…
    CVE-2022-43604 (CVSS 10) — An out-of-bounds write vulnerability exists in the GetAttributeList attribute_count_request functionality of E…
    CVE-2022-43606 (CVSS 7.5) — A use-of-uninitialized-pointer vulnerability exists in the Forward Open connection_management_entry functional…
    CVE-2022-32434 (CVSS 7.8) — EIPStackGroup OpENer v2.3.0 was discovered to contain a stack overflow via /bin/posix/src/ports/POSIX/OpENer+0…
    CVE-2021-27500 (CVSS 7.5) — A specifically crafted packet sent by an attacker to EIPStackGroup OpENer EtherNet/IP commits and versions pri…

    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