CVE-2019-17595

There is a heap-based buffer over-read in the fmt_entry function in tinfo/comp_hash.c in the terminfo library in ncurses before 6.1-20191012.

The ncurses (new curses) library routines are a terminal-independent method of updating character screens with reasonable optimization. The ncurses packages contain support utilities including a terminfo compiler tic, a decompiler infocmp, clear, tput, tset, and a termcap conversion tool captoinfo.

Security Fix(es):

• ncurses: heap-based buffer overflow in the _nc_find_entry function in tinfo/comp_hash.c (CVE-2019-17594)

• ncurses: heap-based buffer overflow in the fmt_entry function in tinfo/comp_hash.c (CVE-2019-17595)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Additional Changes:

For detailed information on changes in this release, see the Rocky Linux 8.5 Release Notes linked from the References section.

There is a heap-based buffer over-read in the fmt_entry function in tinfo/comp_hash.c in the terminfo library in ncurses before 6.1-20191012.

The ncurses (new curses) library routines are a terminal-independent method of updating character screens with reasonable optimization. The ncurses packages contain support utilities including a terminfo compiler tic, a decompiler infocmp, clear, tput, tset, and a termcap conversion tool captoinfo.

Security Fix(es):

• ncurses: heap-based buffer overflow in the _nc_find_entry function in tinfo/comp_hash.c (CVE-2019-17594)

• ncurses: heap-based buffer overflow in the fmt_entry function in tinfo/comp_hash.c (CVE-2019-17595)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Additional Changes:

For detailed information on changes in this release, see the AlmaLinux Release Notes linked from the References section.

Updated ncurses packages fix security vulnerabilities:

Heap-based buffer over-read in the _nc_find_entry function (CVE-2019-17594).

Heap-based buffer over-read in the fmt_entry function (CVE-2019-17595).

This update for ncurses fixes the following issues:

Security issues fixed:

• CVE-2019-17594: Fixed a heap-based buffer over-read in the _nc_find_entry function (bsc#1154036).
• CVE-2019-17595: Fixed a heap-based buffer over-read in the fmt_entry function (bsc#1154037).

Non-security issue fixed:

• Removed screen.xterm from terminfo database (bsc#1103320).

This update was imported from the SUSE:SLE-15:Update update project.

This update for ncurses fixes the following issues:

Security issues fixed:

• CVE-2019-17594: Fixed a heap-based buffer over-read in the _nc_find_entry function (bsc#1154036).
• CVE-2019-17595: Fixed a heap-based buffer over-read in the fmt_entry function (bsc#1154037).

Non-security issue fixed:

• Removed screen.xterm from terminfo database (bsc#1103320).

This update was imported from the SUSE:SLE-15:Update update project.

This update for ncurses fixes the following issues:

Security issues fixed:

• CVE-2019-17594: Fixed a heap-based buffer over-read in the _nc_find_entry function (bsc#1154036).
• CVE-2019-17595: Fixed a heap-based buffer over-read in the fmt_entry function (bsc#1154037).

Non-security issue fixed:

• Removed screen.xterm from terminfo database (bsc#1103320).

This update for ncurses fixes the following issues:

Security issue fixed:

• CVE-2018-10754: Fixed a denial of service caused by a NULL Pointer Dereference in the _nc_parse_entry() (bsc#1131830).
• CVE-2019-17594: Fixed a heap-based buffer over-read in _nc_find_entry function in tinfo/comp_hash.c (bsc#1154036).
• CVE-2019-17595: Fixed a heap-based buffer over-read in fmt_entry function in tinfo/comp_hash.c (bsc#1154037).

Bug fixes:

• Fixed ppc64le build configuration (bsc#1134550).

Hosein Askari discovered that ncurses was incorrectly performing memory management operations when dealing with long filenames while writing structures into the file system. An attacker could possibly use this issue to cause a denial of service or execute arbitrary code. (CVE-2017-16879)

Chung-Yi Lin discovered that ncurses was incorrectly handling access to invalid memory areas when parsing terminfo or termcap entries where the use-name had invalid syntax. An attacker could possibly use this issue to cause a denial of service. (CVE-2018-19211)

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. (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. (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. (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. (CVE-2022-29458)

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)