UBUNTU-CVE-2021-22898

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    UBUNTU-CVE-2021-22898

    Published: 26 May 2021Last Modified: 27 Apr 2026
    Upstream:
    CVE-2021-22898

    Summary:

    Details: curl 7.7 through 7.76.1 suffers from an information disclosure when the `-t` command line option, known as `CURLOPT_TELNETOPTIONS` in libcurl, is used to send variable=content pairs to TELNET servers. Due to a flaw in the option parser for sending NEW_ENV variables, libcurl could be made to pass on uninitialized data from a stack based buffer to the server, resulting in potentially revealing sensitive internal information to the server using a clear-text network protocol.

    References: https://ubuntu.com/security/CVE-2021-22898, https://curl.se/docs/CVE-2021-22898.html, https://ubuntu.com/security/notices/USN-5021-1, https://ubuntu.com/security/notices/USN-5021-2, https://ubuntu.com/security/notices/USN-5894-1, https://www.cve.org/CVERecord?id=CVE-2021-22898

    Affected packages

    Package

    Name: curl

    Purl: pkg:deb/ubuntu/[email protected]+esm14?arch=source&distro=trusty/esm

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -7.35.0-1ubuntu2.20+esm14

    Affected versions

    7.32.0-1ubuntu1

    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-2021-22898 | CVE-DB