NetSight
IP …
critical9.8

CVE-2023-38545

This flaw makes curl overflow a heap based buffer in the SOCKS5 proxy handshake.

Impact

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.

Affected products

VendorProductAffected versions
HaxxLibcurl
from 7.69.0 before 8.4.0
FedoraprojectFedora
Version 37
NetappActive Iq Unified Manager
All versions
NetappOncommand Insight
All versions
NetappOncommand Workflow Automation
All versions
MicrosoftWindows 10 1809
before 10.0.17763.5122
MicrosoftWindows 10 21h2
before 10.0.19044.3693
MicrosoftWindows 10 22h2
before 10.0.19045.3693
MicrosoftWindows 11 21h2
before 10.0.22000.2600
MicrosoftWindows 11 22h2
before 10.0.22621.2715
MicrosoftWindows 11 23h2
before 10.0.22631.2715
MicrosoftWindows Server 2019
before 10.0.17763.5122

Weakness classification

CWE-787

References