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    CVE-2021-34121

    An Out of Bounds flaw was discovered in htmodoc 1.9.12 in function parse_tree() in toc.cxx, this possibly leads to memory layout information leaking in the data. This might be used in a chain of vulnerability in order to reach code execution.

    Published:Jul 18, 2023
    Last Modified:Nov 21, 2024
    EPS:Jul 18, 2023
    EPSS Score:0.00027
    CVSS Score:7.8

    Affected Products

    Vendor
    Htmldoc Project
    Product
    Htmldoc

    Exploits

    https://github.com/michaelrsweet/htmldoc/issues/433https://github.com/michaelrsweet/htmldoc/issues/433

    Common Weakness Enumeration

    CWE-125 Out-of-bounds Read

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-540 Overread Buffers

    Related CVEs

    CVE-2024-46478 (CVSS 9.8) — HTMLDOC v1.9.18 contains a buffer overflow in parse_pre function,ps-pdf.cxx:5681.…
    CVE-2024-45508 (CVSS 9.8) — HTMLDOC before 1.9.19 has an out-of-bounds write in parse_paragraph in ps-pdf.cxx because of an attempt to str…
    CVE-2021-34119 (CVSS 7.8) — A flaw was discovered in htmodoc 1.9.12 in function parse_paragraph in ps-pdf.cxx ,this flaw possibly allows p…
    CVE-2022-0137 (CVSS 7.5) — A heap buffer overflow in image_set_mask function of HTMLDOC before 1.9.15 allows an attacker to write outside…
    CVE-2022-34035 (CVSS 7.5) — HTMLDoc v1.9.12 and below was discovered to contain a heap overflow via e_node htmldoc/htmldoc/html.cxx:588.…
    CVE-2022-34033 (CVSS 7.5) — HTMLDoc v1.9.15 was discovered to contain a heap overflow via (write_header) /htmldoc/htmldoc/html.cxx:273.…
    CVE-2022-27114 (CVSS 5.5) — There is a vulnerability in htmldoc 1.9.16. In image_load_jpeg function image.cxx when it calls malloc,'img->w…
    CVE-2022-28085 (CVSS 7.8) — A flaw was found in htmldoc commit 31f7804. A heap buffer overflow in the function pdf_write_names in ps-pdf.c…
    CVE-2022-24191 (CVSS 5.5) — In HTMLDOC 1.9.14, an infinite loop in the gif_read_lzw function can lead to a pointer arbitrarily pointing to…
    CVE-2021-23165 (CVSS 9.8) — A flaw was found in htmldoc before v1.9.12. Heap buffer overflow in pspdf_prepare_outpages(), in ps-pdf.cxx ma…

    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