Home/CVE/An issue was discovered in ncurses through v6.2-1. _nc_captoinfo in captoinfo.c has a heap-based buffer overflow.
CVE

CVE-2021-39537

An issue was discovered in ncurses through v6.2-1. _nc_captoinfo in captoinfo.c has a heap-based buffer overflow.

An issue was discovered in ncurses through v6.2-1. _nc_captoinfo in captoinfo.c has a heap-based buffer overflow.

HIGH · CVSS 8.8 EPSS 0.00365
Act now
  • Public exploit or PoC is available
  • CVSS base score ≥ 7.0
Sigma rules8 YARA rules0
⬡

Weakness Classification

CWE-787Out-of-bounds Write
▤

Affected Products & Versions

3
gnu ncurses<= 6.2.1
apple mac os xall versions
apple macosall versions
⚠

Public Exploits & PoCs

1
poclists.gnu.org · msg00006.htmllists.gnu.org
◈

Sigma Hunt Rules

8
Exact rules name this CVE ID. Product rules name an affected product in their title. Related rules cover techniques used by actors who exploited this CVE. Showing the most relevant matches; the complete related set is on the full drill-down.
producthighSuspicious Microsoft Office Child Process - MacOS
producthighRemote Access Tool - Renamed MeshAgent Execution - MacOS
producthighBinary Padding - MacOS
productmediumSuspicious Execution via macOS Script Editor
productmediumSystem Information Discovery Via Sysctl - MacOS
productmediumNew File Exclusion Added To Time Machine Via Tmutil - MacOS
▣

Scoring & Timeline

8.8
HIGH · CVSS v3.1 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD20 Sep 2021 · 04:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
⚑

Vendor Advisories

7
usnUSN-6099-1
usnUSN-5477-1
suse-csafopenSUSE-SU-2021:1417-1
suse-csafopenSUSE-SU-2021:3490-1
suse-csafSUSE-SU-2021:3490-1
🔗

References & Sources

11
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://cvsweb.netbsd.org/bsdweb.cgi/pkgsrc/devel/ncurses/patches/patch-ncurses_tinfo_captoinfo.c?rev=1.1&content-type=text/x-cvsweb-markupPatchThird Party Advisory
http://seclists.org/fulldisclosure/2022/Oct/28Mailing ListThird Party Advisory
http://seclists.org/fulldisclosure/2022/Oct/41Mailing ListThird Party Advisory
http://seclists.org/fulldisclosure/2022/Oct/43Mailing ListThird Party Advisory
http://seclists.org/fulldisclosure/2022/Oct/45Mailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2023/12/msg00004.html
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