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Ubuntu Security Notice USN-3598-2
May 24, 2018

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

- Ubuntu 12.04 ESM

Summary:

Several security issues were fixed in curl.

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

Details:

USN-3598-1 fixed a vulnerability in curl. This update provides
the corresponding update for Ubuntu 12.04 ESM.

Original advisory details:

 Phan Thanh discovered that curl incorrectly handled certain FTP paths.
 An attacker could use this to cause a denial of service or possibly
 execute arbitrary code. (CVE-2018-1000120)

 Dario Weisser discovered that curl incorrectly handled certain LDAP
 URLs. An attacker could possibly use this issue to cause a denial of
 service. (CVE-2018-1000121)

 Max Dymond discovered that curl incorrectly handled certain RTSP data.
 An attacker could possibly use this to cause a denial of service or
 even to get access to sensitive data. (CVE-2018-1000122)

 Max Dymond discovered that curl incorrectly handled certain RTSP
 responses. If a user or automated system were tricked into connecting
 to a malicious server, a remote attacker could use this issue to cause
 curl to crash, resulting in a denial of service, or possibly obtain
 sensitive information. (CVE-2018-1000301)

Update instructions:

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

Ubuntu 12.04 ESM:
  curl                            7.22.0-3ubuntu4.21
  libcurl3                        7.22.0-3ubuntu4.21
  libcurl3-gnutls                 7.22.0-3ubuntu4.21
  libcurl3-nss                    7.22.0-3ubuntu4.21

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

References:
  https://usn.ubuntu.com/usn/usn-3598-2
  https://usn.ubuntu.com/usn/usn-3598-1
  CVE-2018-1000120, CVE-2018-1000121, CVE-2018-1000122, CVE-2018-1000301