CVE-2023-38545

This flaw makes curl overflow a heap based buffer in the SOCKS5 proxy handshake. When curl is asked to pass along the host name to the SOCKS5 proxy to allow that to resolve the address instead of it getting done by curl itself, the maximum length that host name can be is 255 bytes. If the host name is detected to be longer, curl switches to local name resolving and instead passes on the resolved address only. Due to this bug, the local variable that means "let the host resolve the name" could get the wrong value during a slow SOCKS5 handshake, and contrary to the intention, copy the too long host name to the target buffer instead of copying just the resolved address there. The target buffer being a heap based buffer, and the host name coming from the URL that curl has been told to operate with.

• Fedora Project Fedora

  OS
  Fedoraproject
  37

• Haxx Libcurl

  APP
  Haxx
  7.69.0 – 8.4.0 (bez)

• Microsoft Windows 10 1809

  OS
  Microsoft
  < 10.0.17763.5122

• Microsoft Windows 10 21h2

  OS
  Microsoft
  < 10.0.19044.3693

• Microsoft Windows 10 22h2

  OS
  Microsoft
  < 10.0.19045.3693

• Microsoft Windows 11 21h2

  OS
  Microsoft
  < 10.0.22000.2600

• Microsoft Windows 11 22h2

  OS
  Microsoft
  < 10.0.22621.2715

• Microsoft Windows 11 23h2

  OS
  Microsoft
  < 10.0.22631.2715

• Microsoft Windows Server 2019

  OS
  Microsoft
  < 10.0.17763.5122

• Microsoft Windows Server 2022

  OS
  Microsoft
  < 10.0.20348.2113

• Netapp Active Iq Unified Manager

  APP
  Netapp
  wszystkie wersje

• Netapp Oncommand Insight

  APP
  Netapp
  wszystkie wersje

• Netapp Oncommand Workflow Automation

  APP
  Netapp
  wszystkie wersje