cURL FTP Shutdown Response Buffer Overflow Remote Code Execution Vulnerability [CVE-2018-1000300]

CVE Number – CVE-2018-1000300

A vulnerability in cURL could allow an unauthenticated, remote attacker to execute arbitrary code on a targeted system.

The vulnerability is due to a heap-based memory buffer overflow condition that could occur when the affected software closes an FTP connection with long server command replies. An attacker could exploit this vulnerability by persuading a user to send a request to an attacker-controlled server. If successful, the attacker-controlled server could return a malicious FTP shutdown response, which could trigger a heap-based memory buffer condition that the attacker could use to execute arbitrary code.

The cURL Project has confirmed the vulnerability and released software updates.

Analysis
  • To exploit this vulnerability, an attacker may use misleading language and instructions to persuade a user to send a request to an attacker-controlled server.
Safeguards
  • Administrators are advised to apply the appropriate updates.

    Administrators are advised to allow only trusted users to have network access.

    Users are advised not to open email messages from suspicious or unrecognized sources. If users cannot verify that links or attachments included in email messages are safe, they are advised not to open them.

    Users are advised not to visit websites or follow links that have suspicious characteristics or cannot be verified as safe.

    Administrators are advised to use an unprivileged account when browsing the Internet.

    Administrators are advised to monitor critical systems.

Vendor Announcements
Fixed Software
  • The cURL Project has released software updates at the following link: cURL 7.60.0





Duncan is a technology professional with over 20 years experience of working in various IT roles. He also has a wide range of other skills in radio, electronics and telecommunications.

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