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broadcomBroadcom Security ResponseBSNSA22679
HistoryOct 16, 2023 - 12:00 a.m.

SOCKS5 heap buffer overflow (CVE-2023-38545)

2023-10-1600:00:00
Broadcom Security Response
support.broadcom.com
17
cve-2023-38545
hostname length
local name resolving
socks5 handshake
buffer overflow
broadcom
curl

EPSS

0.003

Percentile

70.6%

When curl is asked to pass along the hostname to the SOCKS5 proxy to allow that to resolve the address instead of it getting done by curl itself, the maximum length that hostname can be is 255 bytes.If the hostname is detected to be longer than 255 bytes, curl switches to local name resolving and instead passes on the resolved address only to the proxy.

Due to a bug, the local variable that means β€œlet the host resolve the name” could get the wrong value during a slow SOCKS5 handshake, and contrary to the intention, copy the too long hostname to the target buffer instead of copying just the resolved address there. More at: https://curl.se/docs/CVE-2023-38545.html

Products Confirmed Not Affected

No Brocade Fibre Channel Product from Broadcom Products is Known to be affected by this vulnerability.