CVE-2019-3822

Name	CVE-2019-3822
Description	libcurl versions from 7.36.0 to before 7.64.0 are vulnerable to a stack-based buffer overflow. The function creating an outgoing NTLM type-3 header (`lib/vauth/ntlm.c:Curl_auth_create_ntlm_type3_message()`), generates the request HTTP header contents based on previously received data. The check that exists to prevent the local buffer from getting overflowed is implemented wrongly (using unsigned math) and as such it does not prevent the overflow from happening. This output data can grow larger than the local buffer if very large 'nt response' data is extracted from a previous NTLMv2 header provided by the malicious or broken HTTP server. Such a 'large value' needs to be around 1000 bytes or more. The actual payload data copied to the target buffer comes from the NTLMv2 type-2 response header.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
References	DLA-1672-1, DSA-4386-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
curl (PTS)	buster	7.64.0-4+deb10u2	fixed
	buster (security)	7.64.0-4+deb10u9	fixed
	bullseye (security), bullseye	7.74.0-1.3+deb11u11	fixed
	bookworm, bookworm (security)	7.88.1-10+deb12u5	fixed
	sid, trixie	8.7.1-3	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Origin
curl	source	jessie	7.38.0-4+deb8u14	DLA-1672-1
curl	source	stretch	7.52.1-5+deb9u9	DSA-4386-1
curl	source	(unstable)	7.64.0-1

Notes

https://curl.haxx.se/docs/CVE-2019-3822.html
Fixed by: https://github.com/curl/curl/commit/50c9484278c63b958655a717844f0721263939cc
Introduced by: https://github.com/curl/curl/commit/86724581b6c02d160b52f817550cfdfc9c93af62