BIT-haproxy-2021-40346

    Dashboard / Vulnerabilities / BIT-haproxy-2021-40346

    BIT-haproxy-2021-40346

    Published: 6 Mar 2024Last Modified: 8 Sept 2026

    Summary:

    Details: An integer overflow exists in HAProxy 2.0 through 2.5 in htx_add_header that can be exploited to perform an HTTP request smuggling attack, allowing an attacker to bypass all configured http-request HAProxy ACLs and possibly other ACLs.

    References: https://git.haproxy.org/?p=haproxy.git, https://github.com/haproxy/haproxy/commit/3b69886f7dcc3cfb3d166309018e6cfec9ce2c95, https://jfrog.com/blog/critical-vulnerability-in-haproxy-cve-2021-40346-integer-overflow-enables-http-smuggling/, https://lists.apache.org/thread.html/r284567dd7523f5823e2ce995f787ccd37b1cc4108779c50a97c79120%40%3Cdev.cloudstack.apache.org%3E, https://lists.apache.org/thread.html/r8a58fd7a29808e5d27ee56877745e58dc4bb041b9af94601554e2a5a%40%3Cdev.cloudstack.apache.org%3E, https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/A7V2IYO22LWVBGUNZWVKNTMDV4KINLFO/, https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MXTSBY2TEAXWZVFQM3CXHJFRONX7PEMN/, https://www.debian.org/security/2021/dsa-4968, https://www.mail-archive.com/haproxy%40formilux.org, https://www.mail-archive.com/haproxy%40formilux.org/msg41114.html, https://nvd.nist.gov/vuln/detail/CVE-2021-40346

    Affected packages

    Package

    Name: haproxy

    Purl: pkg:bitnami/haproxy

    Affected ranges

    Type: SEMVER

    Events:

    Introduced- 2.0.0
    Fixed -2.0.25

    Affected versions

    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
    BIT-haproxy-2021-40346 | CVE-DB