[USN-3993-2] curl vulnerability

Leonidas S. Barbosa leo.barbosa at canonical.com
Wed May 22 16:51:33 UTC 2019

Ubuntu Security Notice USN-3993-2
May 22, 2019

curl vulnerability

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 14.04 ESM
- Ubuntu 12.04 ESM


curl could be made to crash if it received a specially crafted data.

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


USN-3993-1 fixed a vulnerability in curl. This update provides
the corresponding update for Ubuntu 12.04 ESM and Ubuntu 14.04 ESM.

Original advisory details:

 It was discovered that curl incorrectly handled memory when receiving
 data from a TFTP server. A remote attacker could use this issue to
 cause  curl to  crash, resulting in a denial of service, or possibly
 execute arbitrary code. (CVE-2019-5436)

Update instructions:

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

Ubuntu 14.04 ESM:
  curl                            7.35.0-1ubuntu2.20+esm2
  libcurl3                        7.35.0-1ubuntu2.20+esm2
  libcurl3-gnutls                 7.35.0-1ubuntu2.20+esm2
  libcurl3-nss                    7.35.0-1ubuntu2.20+esm2

Ubuntu 12.04 ESM:
  curl                            7.22.0-3ubuntu4.26
  libcurl3                        7.22.0-3ubuntu4.26
  libcurl3-gnutls                 7.22.0-3ubuntu4.26
  libcurl3-nss                    7.22.0-3ubuntu4.26

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

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