A pjproject regression update has been released for Debian GNU/Linux 9 LTS to address a regression introduces by the previous update.

DLA 2962-2: pjproject regression update

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Debian LTS Advisory DLA-2962-2 debian-lts@lists.debian.org
  https://www.debian.org/lts/security/ Abhijith PA
March 31, 2022   https://wiki.debian.org/LTS
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Package : pjproject
Version : 2.5.5~dfsg-6+deb9u4
CVE ID : CVE-2022-23608

The security update announced as DLA 2962-1 have a regression due to
mistake in backported CVE-2022-23608 patch. Updated packages of
pjproject are now available.

For Debian 9 stretch, this problem has been fixed in version
2.5.5~dfsg-6+deb9u4.

We recommend that you upgrade your pjproject packages.

For the detailed security status of pjproject please refer to
its security tracker page at:
  https://security-tracker.debian.org/tracker/pjproject

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at:   https://wiki.debian.org/LTS