CVE-2016-8622

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    CVE-2016-8622

    Published: 31 Jul 2018Last Modified: 8 Jul 2026

    Summary:

    Details: The URL percent-encoding decode function in libcurl before 7.51.0 is called `curl_easy_unescape`. Internally, even if this function would be made to allocate a unscape destination buffer larger than 2GB, it would return that new length in a signed 32 bit integer variable, thus the length would get either just truncated or both truncated and turned negative. That could then lead to libcurl writing outside of its heap based buffer.

    References: http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html, http://www.securityfocus.com/bid/94105, http://www.securitytracker.com/id/1037192, https://access.redhat.com/errata/RHSA-2018:2486, https://access.redhat.com/errata/RHSA-2018:3558, https://security.gentoo.org/glsa/201701-47, https://www.tenable.com/security/tns-2016-21, https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-8622, https://curl.haxx.se/docs/adv_20161102H.html

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -3c561c657c2f0e553b19115a506592a8bbd744bc

    Affected versions

    curl-7_50_3

    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-2016-8622 | CVE-DB