USN-3457-1: curl vulnerability

Ubuntu Security Notice USN-3457-1

23rd 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

Update instructions

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

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