CVE-2018-16890

Publication date 6 February 2019

Last updated 25 August 2025

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

7.5 · High

Score breakdown

Description

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

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)

Other references