Use After Free Affecting libcurl-devel package, versions <0:7.87.0-2.amzn2.0.1


Severity

0.0
medium
0
10

    Threat Intelligence

    EPSS
    0.1% (43rd percentile)

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  • Snyk ID SNYK-AMZN2-LIBCURLDEVEL-3310704
  • published 4 Feb 2023
  • disclosed 9 Feb 2023

How to fix?

Upgrade Amazon-Linux:2 libcurl-devel to version 0:7.87.0-2.amzn2.0.1 or higher.
This issue was patched in ALAS2-2023-1924.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libcurl-devel package and not the libcurl-devel package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2 relevant fixed versions and status.

A use after free vulnerability exists in curl <7.87.0. Curl can be asked to tunnel virtually all protocols it supports through an HTTP proxy. HTTP proxies can (and often do) deny such tunnel operations. When getting denied to tunnel the specific protocols SMB or TELNET, curl would use a heap-allocated struct after it had been freed, in its transfer shutdown code path.

CVSS Scores

version 3.1
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Snyk

5.9 medium
  • Attack Vector (AV)
    Network
  • Attack Complexity (AC)
    High
  • Privileges Required (PR)
    None
  • User Interaction (UI)
    None
  • Scope (S)
    Unchanged
  • Confidentiality (C)
    None
  • Integrity (I)
    None
  • Availability (A)
    High
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NVD

5.9 medium
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SUSE

5.6 medium
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Red Hat

5.9 medium