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Debian 10 DLA-3682-1 moderate: ncurses denial of service

debian lts
Calendar Grey December 3, 2023
Dist Debian Esm H88
Ubuntu LTS USN-4821-1 resolves package security flaws that could result in system instability and sensitive information leaks. Upgrade recommended
Issues were found in ncurses, a collection of shared libraries for terminal handling, which could lead to denial of service

Summary

CVE-2021-39537

It has been discovered that the tic(1) utility is susceptible to a
heap overflow on crafted input due to improper bounds checking.

CVE-2023-29491

Jonathan Bar Or, Michael Pearse and Emanuele Cozzi have discovered
that when ncurses is used by a setuid application, a local user can
trigger security-relevant memory corruption via malformed data in a
terminfo database file found in $HOME/.terminfo or reached via the
TERMINFO or TERM environment variables.

In order to mitigate this issue, ncurses now further restricts
programs running with elevated privileges (setuid/setgid programs).
Programs run by the superuser remain able to load custom terminfo
entries.

This change aligns ncurses' behavior in buster-security with that of
Debian Bullseye's latest point release (6.2+20201114-2+deb11u2).

For Debian 10 buster, these problems have been fixed in version
6.1+20181013-2+deb10u5.

We recommend that you upgrade your ncurses packages.

Read the Full Advisory


Package: ncurses
Version: 6.1+20181013-2+deb10u5
CVE ID: CVE-2021-39537 CVE-2023-29491
Debian Bug: 1034372

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