CVE-2019-3823

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    CVE-2019-3823

    Published: 6 Feb 2019Last Modified: 8 Jul 2026

    Summary:

    Details: libcurl versions from 7.34.0 to before 7.64.0 are vulnerable to a heap out-of-bounds read in the code handling the end-of-response for SMTP. If the buffer passed to `smtp_endofresp()` isn't NUL terminated and contains no character ending the parsed number, and `len` is set to 5, then the `strtol()` call reads beyond the allocated buffer. The read contents will not be returned to the caller.

    References: https://cert-portal.siemens.com/productcert/pdf/ssa-936080.pdf, https://lists.apache.org/thread.html/8338a0f605bdbb3a6098bb76f666a95fc2b2f53f37fa1ecc89f1146f%40%3Cdevnull.infra.apache.org%3E, http://www.securityfocus.com/bid/106950, https://access.redhat.com/errata/RHSA-2019:3701, https://security.gentoo.org/glsa/201903-03, https://usn.ubuntu.com/3882-1/, https://www.debian.org/security/2019/dsa-4386, https://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html, https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3823, https://curl.haxx.se/docs/CVE-2019-3823.html, https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html, https://security.netapp.com/advisory/ntap-20190315-0001/

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0966b324d911423c81351fb12e9219f71cd63be8
    Fixed -f3294d9d86e6a7915a967efff2842089b8b0d071

    Affected versions

    curl-7_63_0

    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