Ubuntu 18.04 LTS USN-3805-1 Critical: Curl Denial Of Service

ubuntu

October 31, 2018

Several security issues were fixed in curl.

Summary

Several security issues were fixed in curl.

Software Description:

- curl: HTTP, HTTPS, and FTP client and client libraries

Details:

Harry Sintonen discovered that curl incorrectly handled SASL

authentication. A remote attacker could use this issue to cause curl to

crash, resulting in a denial of service, or possibly execute arbitrary

code. (CVE-2018-16839)

Brian Carpenter discovered that curl incorrectly handled memory when

closing certain handles. A remote attacker could use this issue to cause

curl to crash, resulting in a denial of service, or possibly execute

arbitrary code. (CVE-2018-16840)

Brian Carpenter discovered that the curl command-line tool incorrectly

handled error messages. A remote attacker could possibly use this issue to

obtain sensitive information. (CVE-2018-16842)

Topics Covered

security advisory denial of service critical remote access curl

Update Instructions

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 18.10:
  curl                            7.61.0-1ubuntu2.2
  libcurl3-gnutls                 7.61.0-1ubuntu2.2
  libcurl3-nss                    7.61.0-1ubuntu2.2
  libcurl4                        7.61.0-1ubuntu2.2

Ubuntu 18.04 LTS:
  curl                            7.58.0-2ubuntu3.5
  libcurl3-gnutls                 7.58.0-2ubuntu3.5
  libcurl3-nss                    7.58.0-2ubuntu3.5
  libcurl4                        7.58.0-2ubuntu3.5

Ubuntu 16.04 LTS:
  curl                            7.47.0-1ubuntu2.11
  libcurl3                        7.47.0-1ubuntu2.11
  libcurl3-gnutls                 7.47.0-1ubuntu2.11
  libcurl3-nss                    7.47.0-1ubuntu2.11

Ubuntu 14.04 LTS:
  curl                            7.35.0-1ubuntu2.19
  libcurl3                        7.35.0-1ubuntu2.19
  libcurl3-gnutls                 7.35.0-1ubuntu2.19
  libcurl3-nss                    7.35.0-1ubuntu2.19

In general, a standard system update will make all the necessary changes.