UBUNTU-CVE-2026-119760

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    UBUNTU-CVE-2026-119760

    Published: 30 Oct 2026Last Modified: 5 Nov 2026
    Upstream:
    CVE-2026-119760

    Summary:

    Details: sniproxy through 0.7.0 contains a NULL pointer dereference vulnerability in resolv_cancel() that allows remote unauthenticated attackers to crash the daemon by sending overlong hostnames. Attackers can send a 254 or 255 character TLS SNI name or HTTP Host header matching a wildcard backend, then close the connection to terminate the proxy.

    References: https://ubuntu.com/security/CVE-2026-119760, https://www.cve.org/CVERecord?id=CVE-2026-119760, https://github.com/dlundquist/sniproxy/issues/411, https://github.com/dlundquist/sniproxy, https://github.com/dlundquist/sniproxy/blob/1cc625ea41796695a54593d1bd779366b82b8b4e/src/connection.c#L737-L738, https://github.com/dlundquist/sniproxy/blob/1cc625ea41796695a54593d1bd779366b82b8b4e/src/resolv.c#L219-L224, https://github.com/renaudallard/sniproxy/commit/17986ba7397297313331297cac3b9eb3f0ba96b7, https://github.com/renaudallard/sniproxy/commit/d5d78290c8fe15d9aa12185d2c57739b7b0c6a6b, https://www.vulncheck.com/advisories/sniproxy-through-0.7.0-null-pointer-dereference-via-resolv-cancel

    Affected packages

    Package

    Name: sniproxy

    Purl: pkg:deb/ubuntu/sniproxy?arch=source&distro=esm-apps%2Fbionic

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -None

    Affected versions

    0.5.0-2
    0.5.0-2ubuntu0.1~esm1

    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-2026-119760 | CVE-DB