Ncurses
CVE-2021-39537
HIGH
Severity by source
AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Lifecycle Timeline
1DescriptionNVD
An issue was discovered in ncurses through v6.2-1. _nc_captoinfo in captoinfo.c has a heap-based buffer overflow.
AnalysisAI
An issue was discovered in ncurses through v6.2-1. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available.
Technical ContextAI
This vulnerability is classified as Out-of-bounds Write (CWE-787), which allows attackers to write data beyond allocated buffer boundaries leading to code execution or crashes. An issue was discovered in ncurses through v6.2-1. _nc_captoinfo in captoinfo.c has a heap-based buffer overflow. Affected products include: Gnu Ncurses, Apple Mac Os X, Apple Macos.
RemediationAI
A vendor patch is available. Apply the latest security update as soon as possible. Validate write boundaries, use memory-safe languages, enable compiler protections (ASLR, stack canaries).
ncurses before 6.4 20230408, when used by a setuid application, allows local users to trigger security-relevant memory c
In ncurses 6.0, there is a NULL Pointer Dereference in the _nc_parse_entry function of tinfo/parse_entry.c. Rated high s
There is an infinite loop in the next_char function in comp_scan.c in ncurses 6.0, related to libtic. Rated high severit
ncurses 6.3 before patch 20220416 has an out-of-bounds read and segmentation violation in convert_strings in tinfo/read_
There is an illegal address access in the fmt_entry function in progs/dump_entry.c in ncurses 6.0 that might lead to a r
There is an illegal address access in the function postprocess_termcap() in parse_entry.c in ncurses 6.0 that will lead
There is an illegal address access in the _nc_save_str function in alloc_entry.c in ncurses 6.0. Rated medium severity (
There is an illegal address access in the function dump_uses() in progs/dump_entry.c in ncurses 6.0 that might lead to a
There is an illegal address access in the function _nc_read_entry_source() in progs/tic.c in ncurses 6.0 that might lead
There is an illegal address access in the _nc_safe_strcat function in strings.c in ncurses 6.0 that will lead to a remot
In ncurses, possibly a 6.x version, there is a NULL pointer dereference at the function _nc_name_match that will lead to
In ncurses 6.0, there is a stack-based buffer overflow in the fmt_entry function. Rated critical severity (CVSS 9.8), th
Same weakness CWE-787 – Out-of-bounds Write
View allSame technique Buffer Overflow
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External POC / Exploit Code
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