UBUNTU-CVE-2020-21047

    Dashboard / Vulnerabilities / UBUNTU-CVE-2020-21047

    UBUNTU-CVE-2020-21047

    Published: 22 Aug 2023Last Modified: 22 Apr 2026
    Upstream:
    CVE-2020-21047
    Aliases:
    USN-6322-1

    Summary:

    Details: The libcpu component which is used by libasm of elfutils version 0.177 (git 47780c9e), suffers from denial-of-service vulnerability caused by application crashes due to out-of-bounds write (CWE-787), off-by-one error (CWE-193) and reachable assertion (CWE-617); to exploit the vulnerability, the attackers need to craft certain ELF files which bypass the missing bound checks.

    References: https://ubuntu.com/security/CVE-2020-21047, https://sourceware.org/git/?p=elfutils.git;a=commitdiff;h=99dc63b10b3878616b85df2dfd2e4e7103e414b8, https://sourceware.org/bugzilla/show_bug.cgi?id=25068, https://ubuntu.com/security/notices/USN-6322-1, https://www.cve.org/CVERecord?id=CVE-2020-21047

    Affected packages

    Package

    Name: elfutils

    Purl: pkg:deb/ubuntu/[email protected]+esm1?arch=source&distro=trusty/esm

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -0.158-0ubuntu5.3+esm1

    Affected versions

    0.157-1ubuntu1

    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
    UBUNTU-CVE-2020-21047 | CVE-DB