USN-3457-1: curl vulnerability

23 October 2017

curl vulnerability

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

  • Ubuntu 17.10
  • Ubuntu 17.04
  • Ubuntu 16.04 LTS
  • Ubuntu 14.04 LTS


curl could be made to crash or run programs if it received specially crafted network traffic.

Software Description

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


Brian Carpenter discovered that curl incorrectly handled IMAP FETCH response lines. A remote attacker could use this issue to cause curl to crash, resulting in a denial of service, or possibly execute arbitrary code.

Update instructions

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

Ubuntu 17.10
curl - 7.55.1-1ubuntu2.1
libcurl3 - 7.55.1-1ubuntu2.1
libcurl3-gnutls - 7.55.1-1ubuntu2.1
libcurl3-nss - 7.55.1-1ubuntu2.1
Ubuntu 17.04
curl - 7.52.1-4ubuntu1.3
libcurl3 - 7.52.1-4ubuntu1.3
libcurl3-gnutls - 7.52.1-4ubuntu1.3
libcurl3-nss - 7.52.1-4ubuntu1.3
Ubuntu 16.04 LTS
curl - 7.47.0-1ubuntu2.4
libcurl3 - 7.47.0-1ubuntu2.4
libcurl3-gnutls - 7.47.0-1ubuntu2.4
libcurl3-nss - 7.47.0-1ubuntu2.4
Ubuntu 14.04 LTS
curl - 7.35.0-1ubuntu2.12
libcurl3 - 7.35.0-1ubuntu2.12
libcurl3-gnutls - 7.35.0-1ubuntu2.12
libcurl3-nss - 7.35.0-1ubuntu2.12

To update your system, please follow these instructions:

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