Your submission was sent successfully! Close

Thank you for contacting us. A member of our team will be in touch shortly. Close

You have successfully unsubscribed! Close

Thank you for signing up for our newsletter!
In these regular emails you will find the latest updates about Ubuntu and upcoming events where you can meet our team.Close

USN-4665-1: curl vulnerabilities

9 December 2020

Several security issues were fixed in curl.

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Learn more about Ubuntu Pro

Releases

Packages

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

Details

Marc Aldorasi discovered that curl incorrectly handled the libcurl
CURLOPT_CONNECT_ONLY option. This could result in data being sent to the
wrong destination, possibly exposing sensitive information. This issue only
affected Ubuntu 20.10. (CVE-2020-8231)

Varnavas Papaioannou discovered that curl incorrectly handled FTP PASV
responses. An attacker could possibly use this issue to trick curl into
connecting to an arbitrary IP address and be used to perform port scanner
and other information gathering. (CVE-2020-8284)

It was discovered that curl incorrectly handled FTP wildcard matchins. A
remote attacker could possibly use this issue to cause curl to consume
resources and crash, resulting in a denial of service. (CVE-2020-8285)

It was discovered that curl incorrectly handled OCSP response verification.
A remote attacker could possibly use this issue to provide a fraudulent
OCSP response. (CVE-2020-8286)

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Learn more about Ubuntu Pro

Update instructions

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

Ubuntu 20.10
Ubuntu 20.04
Ubuntu 18.04
Ubuntu 16.04

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

References

Related notices

  • USN-4665-2: libcurl3-udeb, libcurl4-doc, libcurl4-nss-dev, libcurl3-gnutls, libcurl3, curl-udeb, libcurl3-nss, libcurl4-openssl-dev, curl, libcurl4-gnutls-dev
  • USN-4466-1: libcurl4-doc, libcurl4-nss-dev, libcurl3-gnutls, libcurl3, libcurl3-nss, libcurl4-openssl-dev, curl, libcurl4-gnutls-dev, libcurl4
  • USN-4466-2: libcurl3-udeb, libcurl4-doc, libcurl4-nss-dev, libcurl3-gnutls, libcurl3, curl-udeb, libcurl3-nss, libcurl4-openssl-dev, curl, libcurl4-gnutls-dev

Join the discussion

Need help with your security needs?

Ubuntu Pro provides up to ten-year security coverage for over 23,000 open-source packages within the Ubuntu Main and Universe repositories.

Talk to an expert to find out what would work best for you

Further reading