poppler regression

USN-6508-1 fixed vulnerabilities in poppler. The update introduced
one minor regression in Ubuntu 18.04 LTS. This update fixes the
problem.

We apologize for the inconvenience.

Original advisory details:

It was discovered that poppler incorrectly handled certain malformed PDF
files. If a user or an automated system were tricked into opening a
specially crafted PDF file, a remote attacker could possibly use this
issue to cause a denial of service. This issue only affected Ubuntu 16.04
LTS, Ubuntu 18.04 LTS and Ubuntu 20.04 LTS. (CVE-2020-23804)

It was discovered that poppler incorrectly handled certain malformed PDF
files. If a user or an automated system were tricked into opening a
specially crafted PDF file, a remote attacker could possibly use this
issue to cause a denial of service. (CVE-2022-37050, CVE-2022-37051,
CVE-2022-37052, CVE-2022-38349)