CVE-2021-3999

    Dashboard / Vulnerabilities / CVE-2021-3999

    CVE-2021-3999

    Published: 24 Aug 2022Last Modified: 28 Aug 2026

    Summary:

    Details: A flaw was found in glibc. An off-by-one buffer overflow and underflow in getcwd() may lead to memory corruption when the size of the buffer is exactly 1. A local attacker who can control the input buffer and size passed to getcwd() in a setuid program could use this flaw to potentially execute arbitrary code and escalate their privileges on the system.

    References: https://sourceware.org/git/gitweb.cgi?p=glibc.git%3Bh=23e0e8f5f1fb5ed150253d986ecccdc90c2dcd5e, https://access.redhat.com/security/cve/CVE-2021-3999, https://lists.debian.org/debian-lts-announce/2022/10/msg00021.html, https://security-tracker.debian.org/tracker/CVE-2021-3999, https://security.netapp.com/advisory/ntap-20221104-0001/, https://bugzilla.redhat.com/show_bug.cgi?id=2024637, https://sourceware.org/bugzilla/show_bug.cgi?id=28769, https://www.openwall.com/lists/oss-security/2022/01/24/4

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -9ea3686266dca3f004ba874745a4087a89682617

    Affected versions

    changelog-ends-here

    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
    CVE-2021-3999 | CVE-DB