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    CVE-2021-42203

    An issue was discovered in swftools through 20201222. A heap-use-after-free exists in the function swf_FontExtract_DefineTextCallback() located in swftext.c. It allows an attacker to cause code execution.

    Published:May 31, 2022
    Last Modified:Nov 21, 2024
    EPS:May 31, 2022
    EPSS Score:0.00693
    CVSS Score:7.8

    Affected Products

    Vendor
    Swftools
    Product
    Swftools

    Exploits

    https://github.com/matthiaskramm/swftools/issues/176https://github.com/matthiaskramm/swftools/issues/176

    Common Weakness Enumeration

    CWE-416 Use After Free

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

    CVE-2025-6271 (CVSS 1.9) — A vulnerability, which was classified as problematic, was found in swftools up to 0.9.2. This affects the func…
    CVE-2024-28458 (CVSS 7.5) — Null Pointer Dereference vulnerability in swfdump in swftools 0.9.2 allows attackers to crash the appliation v…
    CVE-2024-26333 (CVSS 5.5) — swftools v0.9.2 was discovered to contain a segmentation violation via the function free_lines at swftools/lib…
    CVE-2024-26335 (CVSS 5.5) — swftools v0.9.2 was discovered to contain a segmentation violation via the function state_free at swftools/src…
    CVE-2024-26334 (CVSS 6.2) — swftools v0.9.2 was discovered to contain a segmentation violation via the function compileSWFActionCode at sw…
    CVE-2024-26339 (CVSS 9.1) — swftools v0.9.2 was discovered to contain a strcpy parameter overlap via /home/swftools/src/swfc+0x48318a.…
    CVE-2024-26337 (CVSS 4.3) — swftools v0.9.2 was discovered to contain a segmentation violation via the function s_font at swftools/src/swf…
    CVE-2024-25165 (CVSS 7.8) — A global-buffer-overflow vulnerability was found in SWFTools v0.9.2, in the function LineText at lib/swf5compi…
    CVE-2024-22957 (CVSS 5.5) — swftools 0.9.2 was discovered to contain an Out-of-bounds Read vulnerability via the function dict_do_lookup i…
    CVE-2024-22562 (CVSS 7.8) — swftools 0.9.2 was discovered to contain a Stack Buffer Underflow via the function dict_foreach_keyvalue at sw…

    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