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    CVE-2018-20822

    LibSass 3.5.4 allows attackers to cause a denial-of-service (uncontrolled recursion in Sass::Complex_Selector::perform in ast.hpp and Sass::Inspect::operator in inspect.cpp).

    Published:Jun 3, 2018
    Last Modified:Nov 21, 2024
    EPS:Apr 23, 2019
    EPSS Score:0.00521
    CVSS Score:6.5

    Affected Products

    Vendor
    Sass-lang
    Product
    Libsass

    Exploits

    https://github.com/sass/libsass/issues/2671https://github.com/sass/libsass/issues/2671

    Common Weakness Enumeration

    CWE-674 Uncontrolled Recursion

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-230 Serialized Data with Nested Payloads
    CAPEC-231 Oversized Serialized Data Payloads

    Related CVEs

    CVE-2022-43357 (CVSS 7.5) — Stack overflow vulnerability in ast_selectors.cpp in function Sass::CompoundSelector::has_real_parent_ref in l…
    CVE-2022-43358 (CVSS 7.5) — Stack overflow vulnerability in ast_selectors.cpp: in function Sass::ComplexSelector::has_placeholder in libsa…
    CVE-2022-26592 (CVSS 8.8) — Stack Overflow vulnerability in libsass 3.6.5 via the CompoundSelector::has_real_parent_ref function.…
    CVE-2019-18798 (CVSS 6.5) — LibSass before 3.6.3 allows a heap-based buffer over-read in Sass::weaveParents in ast_sel_weave.cpp.…
    CVE-2019-18797 (CVSS 6.5) — LibSass 3.6.1 has uncontrolled recursion in Sass::Eval::operator()(Sass::Binary_Expression*) in eval.cpp.…
    CVE-2019-18799 (CVSS 6.5) — LibSass before 3.6.3 allows a NULL pointer dereference in Sass::Parser::parseCompoundSelector in parser_select…
    CVE-2019-6283 (CVSS 6.5) — In LibSass 3.5.5, a heap-based buffer over-read exists in Sass::Prelexer::parenthese_scope in prelexer.hpp.…
    CVE-2019-6286 (CVSS 6.5) — In LibSass 3.5.5, a heap-based buffer over-read exists in Sass::Prelexer::skip_over_scopes in prelexer.hpp whe…
    CVE-2019-6284 (CVSS 6.5) — In LibSass 3.5.5, a heap-based buffer over-read exists in Sass::Prelexer::alternatives in prelexer.hpp.…
    CVE-2018-20190 (CVSS 6.5) — In LibSass 3.5.5, a NULL Pointer Dereference in the function Sass::Eval::operator()(Sass::Supports_Operator*) …

    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