CVE-2018-16839

Publication date 31 October 2018

Last updated 25 August 2025

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

9.8 · Critical

Score breakdown

Description

Curl versions 7.33.0 through 7.61.1 are vulnerable to a buffer overrun in the SASL authentication code that may lead to denial of service.

Read the notes from the security team

Status

Package Ubuntu Release Status
curl 18.10 cosmic
Fixed 7.61.0-1ubuntu2.2
18.04 LTS bionic
Fixed 7.58.0-2ubuntu3.5
16.04 LTS xenial
Fixed 7.47.0-1ubuntu2.11
14.04 LTS trusty
Fixed 7.35.0-1ubuntu2.19

Notes

mdeslaur

introduced by https://github.com/curl/curl/commit/c56f9797e7feb7c2dc

Severity score breakdown

Parameter Value
Base score 9.8 · Critical
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

Related Ubuntu Security Notices (USN)

Other references