CVE-2018-16890

Publication date 6 February 2019

Last updated 24 July 2024

Ubuntu priority

Cvss 3 Severity Score

libcurl versions from 7.36.0 to before 7.64.0 is vulnerable to a heap buffer out-of-bounds read. The function handling incoming NTLM type-2 messages (`lib/vauth/ntlm.c:ntlm_decode_type2_target`) does not validate incoming data correctly and is subject to an integer overflow vulnerability. Using that overflow, a malicious or broken NTLM server could trick libcurl to accept a bad length + offset combination that would lead to a buffer read out-of-bounds.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
curl	18.10 cosmic	Fixed 7.61.0-1ubuntu2.3
	18.04 LTS bionic	Fixed 7.58.0-2ubuntu3.6
	16.04 LTS xenial	Fixed 7.47.0-1ubuntu2.12
	14.04 LTS trusty	Not affected

Notes

mdeslaur

affects libcurl 7.36.0 to and including 7.63.0

Severity score breakdown

Parameter	Value
Base score	7.5 · High
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	None
Integrity impact	None
Availability impact	High
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

Related Ubuntu Security Notices (USN)

USN-3882-1
curl vulnerabilities
6 February 2019