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    CVE-2021-26910

    Firejail before 0.9.64.4 allows attackers to bypass intended access restrictions because there is a TOCTOU race condition between a stat operation and an OverlayFS mount operation.

    Published:Feb 8, 2021
    Last Modified:Nov 21, 2024
    EPS:Feb 8, 2021
    EPSS Score:0.0005
    CVSS Score:7.8

    Affected Products

    Vendor
    Debian
    Product
    Debian Linux
    Vendor
    Firejail Project
    Product
    Firejail

    Exploits

    http://www.openwall.com/lists/oss-security/2021/02/09/1https://unparalleled.eu/blog/2021/20210208-rigged-race-against-firejail-for-local-root/https://unparalleled.eu/publications/2021/advisory-unpar-2021-0.txthttp://www.openwall.com/lists/oss-security/2021/02/09/1https://unparalleled.eu/blog/2021/20210208-rigged-race-against-firejail-for-local-root/https://unparalleled.eu/publications/2021/advisory-unpar-2021-0.txt

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    References

    http://www.openwall.com/lists/oss-security/2021/02/09/1
    https://github.com/netblue30/firejail/commit/97d8a03cad19501f017587cc4e47d8418273834b
    https://github.com/netblue30/firejail/releases/tag/0.9.64.4
    https://lists.debian.org/debian-lts-announce/2021/02/msg00015.html
    https://security.gentoo.org/glsa/202105-19
    https://unparalleled.eu/blog/2021/20210208-rigged-race-against-firejail-for-local-root/
    https://unparalleled.eu/publications/2021/advisory-unpar-2021-0.txt
    https://www.debian.org/security/2021/dsa-4849
    http://www.openwall.com/lists/oss-security/2021/02/09/1
    https://github.com/netblue30/firejail/commit/97d8a03cad19501f017587cc4e47d8418273834b
    https://github.com/netblue30/firejail/releases/tag/0.9.64.4
    https://lists.debian.org/debian-lts-announce/2021/02/msg00015.html
    https://security.gentoo.org/glsa/202105-19
    https://unparalleled.eu/blog/2021/20210208-rigged-race-against-firejail-for-local-root/
    https://unparalleled.eu/publications/2021/advisory-unpar-2021-0.txt
    https://www.debian.org/security/2021/dsa-4849

    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