Use of Uninitialized Resource Affecting libcurl package, versions *


Severity

Recommended
0.0
low
0
10

Based on CentOS security rating

    Threat Intelligence

    EPSS
    0.3% (70th percentile)

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  • Snyk ID SNYK-CENTOS6-LIBCURL-2027895
  • published 26 Jul 2021
  • disclosed 21 Jul 2021

How to fix?

There is no fixed version for Centos:6 libcurl.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libcurl package and not the libcurl package as distributed by Centos. See How to fix? for Centos:6 relevant fixed versions and status.

curl supports the -t command line option, known as CURLOPT_TELNETOPTIONSin 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.

CVSS Scores

version 3.1
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NVD

5.3 medium
  • Attack Vector (AV)
    Network
  • Attack Complexity (AC)
    Low
  • Privileges Required (PR)
    None
  • User Interaction (UI)
    None
  • Scope (S)
    Unchanged
  • Confidentiality (C)
    Low
  • Integrity (I)
    None
  • Availability (A)
    None
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Red Hat

3.1 low
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SUSE

4.3 medium