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Rewterz Threat Advisory – CVE-2020-13956 – Apache HttpClient security bypass

Severity

Medium

Analysis Summary

Apache HttpClient could allow a remote attacker to bypass security restrictions, caused by the improper handling of malformed authority component in request URIs. By passing request URIs to the library as java.net.URI object, an attacker could exploit this vulnerability to pick the wrong target host for request execution.

Impact

Security bypass

Affected Vendors

Apache

Affected Products

  • Apache HttpClient 4.5.12
  • Apache HttpClient 5.0.2

Remediation

Upgrade to the latest version of HttpClient (4.5.13 or 5.0.3 or later).

https://seclists.org/oss-sec/2020/q4/34