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USN-6099-1: ncurses vulnerabilities

23 May 2023

Several security issues were fixed in ncurses.

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Releases

Packages

  • ncurses - shared libraries for terminal handling

Details

It was discovered that ncurses was incorrectly performing bounds
checks when processing invalid hashcodes. An attacker could possibly
use this issue to cause a denial of service or to expose sensitive
information. This issue only affected Ubuntu 18.04 LTS.
(CVE-2019-17594)

It was discovered that ncurses was incorrectly handling
end-of-string characters when processing terminfo and termcap files.
An attacker could possibly use this issue to cause a denial of
service or to expose sensitive information. This issue only affected
Ubuntu 18.04 LTS. (CVE-2019-17595)

It was discovered that ncurses was incorrectly handling
end-of-string characters when converting between termcap and
terminfo formats. An attacker could possibly use this issue to cause
a denial of service or execute arbitrary code. This issue only
affected Ubuntu 18.04 LTS and Ubuntu 20.04 LTS. (CVE-2021-39537)

It was discovered that ncurses was incorrectly performing bounds
checks when dealing with corrupt terminfo data while reading a
terminfo file. An attacker could possibly use this issue to cause a
denial of service or to expose sensitive information. This issue only
affected Ubuntu 18.04 LTS, Ubuntu 20.04 LTS and Ubuntu 22.04 LTS.
(CVE-2022-29458)

It was discovered that ncurses was parsing environment variables when
running with setuid applications and not properly handling the
processing of malformed data when doing so. A local attacker could
possibly use this issue to cause a denial of service (application
crash) or execute arbitrary code. (CVE-2023-29491)

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 23.04
Ubuntu 22.10
Ubuntu 22.04
Ubuntu 20.04
Ubuntu 18.04
Ubuntu 16.04
Ubuntu 14.04

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

Related notices

  • USN-5477-1: lib32ncurses5-dev, ncurses-doc, lib32ncursesw5, libtinfo5, libtinfo-dev, libx32ncursesw5-dev, ncurses-bin, ncurses-examples, lib32ncurses5, libncurses5, libncurses5-dev, lib64ncurses5, libx32ncurses5-dev, libncursesw5-dev, ncurses, libncursesw5, ncurses-base, lib32ncursesw5-dev, lib32tinfo-dev, libx32tinfo5, lib32tinfo5, libx32ncurses5, libx32ncursesw5, lib64ncurses5-dev, libx32tinfo-dev, lib64tinfo5, ncurses-term