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    CVE-2017-5923

    libyara/grammar.y in YARA 3.5.0 allows remote attackers to cause a denial of service (heap-based out-of-bounds read and application crash) via a crafted rule that is mishandled in the yara_yyparse function.

    Published:Apr 3, 2017
    Last Modified:Apr 20, 2025
    EPS:Apr 3, 2017
    EPSS Score:0.00787
    CVSS Score:7.5

    Affected Products

    Vendor
    Virustotal
    Product
    Yara

    Exploits

    https://github.com/VirusTotal/yara/issues/597https://github.com/VirusTotal/yara/issues/597

    Common Weakness Enumeration

    CWE-125 Out-of-bounds Read

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-540 Overread Buffers

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    CVE-2021-3402 (CVSS 9.1) — An integer overflow and several buffer overflow reads in libyara/modules/macho/macho.c in YARA v4.0.3 and earl…
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    CVE-2019-5020 (CVSS 5.5) — An exploitable denial of service vulnerability exists in the object lookup functionality of Yara 3.8.1. A spec…
    CVE-2018-19974 (CVSS 5.5) — In YARA 3.8.1, bytecode in a specially crafted compiled rule can read uninitialized data from VM scratch memor…
    CVE-2018-19975 (CVSS 5.5) — In YARA 3.8.1, bytecode in a specially crafted compiled rule can read data from any arbitrary address in memor…
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    CVE-2018-12034 (CVSS 7.8) — In YARA 3.7.1 and prior, parsing a specially crafted compiled rule file can cause an out of bounds read vulner…
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    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