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    CVE-2017-12940

    libunrar.a in UnRAR before 5.5.7 has an out-of-bounds read in the EncodeFileName::Decode call within the Archive::ReadHeader15 function.

    Published:Aug 18, 2017
    Last Modified:Apr 20, 2025
    EPS:Aug 18, 2017
    EPSS Score:0.00448
    CVSS Score:9.8

    Affected Products

    Vendor
    Rarlab
    Product
    Unrar

    Exploits

    http://seclists.org/oss-sec/2017/q3/290http://seclists.org/oss-sec/2017/q3/290

    Common Weakness Enumeration

    CWE-125 Out-of-bounds Read

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-540 Overread Buffers

    Related CVEs

    CVE-2022-48579 (CVSS 7.5) — UnRAR before 6.2.3 allows extraction of files outside of the destination folder via symlink chains.…
    CVE-2022-30333 (CVSS 7.5) — RARLAB UnRAR before 6.12 on Linux and UNIX allows directory traversal to write to files during an extract (aka…
    CVE-2017-20006 (CVSS 7.8) — UnRAR 5.6.1.2 and 5.6.1.3 has a heap-based buffer overflow in Unpack::CopyString (called from Unpack::Unpack5 …
    CVE-2018-25018 (CVSS 7.8) — UnRAR 5.6.1.7 through 5.7.4 and 6.0.3 has an out-of-bounds write during a memcpy in QuickOpen::ReadRaw when ca…
    CVE-2017-14122 (CVSS 9.1) — unrar 0.0.1 (aka unrar-free or unrar-gpl) suffers from a stack-based buffer over-read in unrarlib.c, related t…
    CVE-2017-14120 (CVSS 7.5) — unrar 0.0.1 (aka unrar-free or unrar-gpl) suffers from a directory traversal vulnerability for RAR v2 archives…
    CVE-2017-14121 (CVSS 5.5) — The DecodeNumber function in unrarlib.c in unrar 0.0.1 (aka unrar-free or unrar-gpl) suffers from a NULL point…
    CVE-2017-12941 (CVSS 9.8) — libunrar.a in UnRAR before 5.5.7 has an out-of-bounds read in the Unpack::Unpack20 function.…
    CVE-2017-12942 (CVSS 9.8) — libunrar.a in UnRAR before 5.5.7 has a buffer overflow in the Unpack::LongLZ function.…
    CVE-2017-12938 (CVSS 7.5) — UnRAR before 5.5.7 allows remote attackers to bypass a directory-traversal protection mechanism via vectors in…

    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