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Ubuntu Security Notice USN-5172-1
December 06, 2021

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

- Ubuntu 18.04 LTS

Summary:

Several security issues were fixed in uriparser.

Software Description:
- uriparser: Strictly RFC 3986 compliant URI parsing library

Details:

It was discovered that uriparser mishandled certain input. An attacker
could use this vulnerability to cause uriparser to crash or possibly
execute arbitrary code. (CVE-2018-19198, CVE-2018-19199, CVE-2018-19200)

It was discovered that uriparser incorrectly handled certain URIs. An
attacker could use this vulnerability to cause a crash or possibly leak
sensitive information. (CVE-2018-20721)

Update instructions:

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

Ubuntu 18.04 LTS:
  liburiparser1                   0.8.4-1+deb9u2build0.18.04.1

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

References:
  https://ubuntu.com/security/notices/USN-5172-1
  CVE-2018-19198, CVE-2018-19199, CVE-2018-19200, CVE-2018-20721

Package Information:
  https://launchpad.net/ubuntu/+source/uriparser/0.8.4-1+deb9u2build0.18.04.1