UBUNTU-CVE-2021-31807

    Dashboard / Vulnerabilities / UBUNTU-CVE-2021-31807

    UBUNTU-CVE-2021-31807

    Published: 28 May 2021Last Modified: 4 Feb 2026
    Upstream:
    CVE-2021-31807
    Aliases:
    USN-4981-1

    Summary:

    Details: An issue was discovered in Squid before 4.15 and 5.x before 5.0.6. An integer overflow problem allows a remote server to achieve Denial of Service when delivering responses to HTTP Range requests. The issue trigger is a header that can be expected to exist in HTTP traffic without any malicious intent.

    References: https://ubuntu.com/security/CVE-2021-31807, https://github.com/squid-cache/squid/security/advisories/GHSA-pxwq-f3qr-w2xf, https://ubuntu.com/security/notices/USN-4981-1, https://www.cve.org/CVERecord?id=CVE-2021-31807

    Affected packages

    Package

    Name: squid3

    Purl: pkg:deb/ubuntu/[email protected]+esm6?arch=source&distro=esm-infra/xenial

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -None

    Affected versions

    3.3.8-1ubuntu16
    3.3.8-1ubuntu17

    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-2021-31807 | CVE-DB