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    CVE-2021-43541

    When invoking protocol handlers for external protocols, a supplied parameter URL containing spaces was not properly escaped. This vulnerability affects Thunderbird < 91.4.0, Firefox ESR < 91.4.0, and Firefox < 95.

    Published:Dec 7, 2021
    Last Modified:Nov 21, 2024
    EPS:Dec 8, 2021
    EPSS Score:0.0036
    CVSS Score:6.5

    Affected Products

    Vendor
    Debian
    Product
    Debian Linux
    Vendor
    Mozilla
    Product
    Firefox
    Vendor
    Mozilla
    Product
    Firefox Esr
    Vendor
    Mozilla
    Product
    Thunderbird
    Vendor
    Redhat
    Product
    Enterprise Linux
    Vendor
    Redhat
    Product
    Rhel E4s
    Vendor
    Redhat
    Product
    Rhel Eus

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-428 Unquoted Search Path or Element

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

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    References

    https://bugzilla.mozilla.org/show_bug.cgi?id=1696685
    https://lists.debian.org/debian-lts-announce/2021/12/msg00030.html
    https://lists.debian.org/debian-lts-announce/2022/01/msg00001.html
    https://security.gentoo.org/glsa/202202-03
    https://security.gentoo.org/glsa/202208-14
    https://www.debian.org/security/2021/dsa-5026
    https://www.debian.org/security/2022/dsa-5034
    https://www.mozilla.org/security/advisories/mfsa2021-52/
    https://www.mozilla.org/security/advisories/mfsa2021-53/
    https://www.mozilla.org/security/advisories/mfsa2021-54/
    https://bugzilla.mozilla.org/show_bug.cgi?id=1696685
    https://lists.debian.org/debian-lts-announce/2021/12/msg00030.html
    https://lists.debian.org/debian-lts-announce/2022/01/msg00001.html
    https://security.gentoo.org/glsa/202202-03
    https://security.gentoo.org/glsa/202208-14
    https://www.debian.org/security/2021/dsa-5026
    https://www.debian.org/security/2022/dsa-5034
    https://www.mozilla.org/security/advisories/mfsa2021-52/
    https://www.mozilla.org/security/advisories/mfsa2021-53/
    https://www.mozilla.org/security/advisories/mfsa2021-54/

    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