Integer Overflow or Wraparound Affecting libcurl package, versions *


Severity

Recommended
0.0
low
0
10

Based on Red Hat Enterprise Linux security rating

    Threat Intelligence

    EPSS
    1.27% (86th percentile)

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  • Snyk ID SNYK-RHEL7-LIBCURL-1357042
  • published 26 Jul 2021
  • disclosed 2 Nov 2016

How to fix?

There is no fixed version for RHEL:7 libcurl.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libcurl package and not the libcurl package as distributed by RHEL. See How to fix? for RHEL:7 relevant fixed versions and status.

The URL percent-encoding decode function in libcurl before 7.51.0 is called curl_easy_unescape. Internally, even if this function would be made to allocate a unscape destination buffer larger than 2GB, it would return that new length in a signed 32 bit integer variable, thus the length would get either just truncated or both truncated and turned negative. That could then lead to libcurl writing outside of its heap based buffer.