UBUNTU-CVE-2021-22925

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    UBUNTU-CVE-2021-22925

    Published: 21 Jul 2021Last Modified: 27 Apr 2026
    Upstream:
    CVE-2021-22925

    Summary:

    Details: curl supports the `-t` command line option, known as `CURLOPT_TELNETOPTIONS`in libcurl. This rarely used option is used to send variable=content pairs toTELNET servers.Due to flaw in the option parser for sending `NEW_ENV` variables, libcurlcould be made to pass on uninitialized data from a stack based buffer to theserver. Therefore potentially revealing sensitive internal information to theserver using a clear-text network protocol.This could happen because curl did not call and use sscanf() correctly whenparsing the string provided by the application.

    References: https://ubuntu.com/security/CVE-2021-22925, https://curl.se/docs/CVE-2021-22925.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-2021-22925

    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-2021-22925 | CVE-DB