CVE-2021-39537

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Summary

CVECVE-2021-39537
StatePUBLISHED
Assignermitre
Source PriorityCVE Program / NVD first with legacy fallback
Published2021-09-20 16:15:12 UTC
Updated2026-07-27 13:43:06 UTC
DescriptionAn issue was discovered in ncurses through v6.2-1. _nc_captoinfo in captoinfo.c has a heap-based buffer overflow.

Risk And Classification

Primary CVSS: v3.1 8.8 HIGH from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS: 0.032310000 probability, percentile 0.869640000 (date 2026-07-29)

Problem Types: CWE-787 | n/a

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary8.8HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
2.0[email protected]Primary6.8AV:N/AC:M/Au:N/C:P/I:P/A:P

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS v2.0 Breakdown

Access Vector
Network
Access Complexity
Medium
Authentication
None
Confidentiality
Partial
Integrity
Partial
Availability
Partial

AV:N/AC:M/Au:N/C:P/I:P/A:P

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Apple Macos 11.7 All All All
Operating System Apple Macos 13.0 All All All
Operating System Apple Mac Os X 10.12.6 All All All
Application Invisible-island Ncurses All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na N/a affected n/a Not specified

References

ReferenceSourceLinkTags
Full Disclosure: APPLE-SA-2022-10-27-7 Additional information for APPLE-SA-2022-09-12-4 macOS Monterey 12.6 af854a3a-2127-422b-91ae-364da2661108 seclists.org Mailing List, Third Party Advisory
About the security content of macOS Big Sur 11.7 - Apple Support af854a3a-2127-422b-91ae-364da2661108 support.apple.com Third Party Advisory
A heap-buffer-overflow in captoinfo.c:321:12 af854a3a-2127-422b-91ae-364da2661108 lists.gnu.org Exploit, Mailing List, Vendor Advisory
Full Disclosure: APPLE-SA-2022-10-24-2 macOS Ventura 13 af854a3a-2127-422b-91ae-364da2661108 seclists.org Mailing List, Third Party Advisory
Re: CVE-2021-39537 af854a3a-2127-422b-91ae-364da2661108 lists.gnu.org Mailing List, Vendor Advisory
About the security content of macOS Monterey 12.6 - Apple Support af854a3a-2127-422b-91ae-364da2661108 support.apple.com Third Party Advisory
pkgsrc/devel/ncurses/patches/patch-ncurses_tinfo_captoinfo.c - view - 1.1 af854a3a-2127-422b-91ae-364da2661108 cvsweb.netbsd.org Patch, Third Party Advisory
Full Disclosure: APPLE-SA-2022-10-27-9 Additional information for APPLE-SA-2022-09-12-3 macOS Big Sur 11.7 af854a3a-2127-422b-91ae-364da2661108 seclists.org Mailing List, Third Party Advisory
CVE-2021-39537 GNU Ncurses Vulnerability in NetApp Products | NetApp Product Security af854a3a-2127-422b-91ae-364da2661108 security.netapp.com
lists.debian.org/debian-lts-announce/2023/12/msg00004.html af854a3a-2127-422b-91ae-364da2661108 lists.debian.org
Full Disclosure: APPLE-SA-2022-10-27-5 Additional information for APPLE-SA-2022-10-24-2 macOS Ventura 13 af854a3a-2127-422b-91ae-364da2661108 seclists.org Mailing List, Third Party Advisory
About the security content of macOS Ventura 13 - Apple Support af854a3a-2127-422b-91ae-364da2661108 support.apple.com Third Party Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Legacy QID Mappings

  • 181569 Debian Security Update for ncurses (CVE-2021-39537)
  • 199358 Ubuntu Security Notification for ncurses Vulnerabilities (USN-6099-1)
  • 354130 Amazon Linux Security Advisory for ncurses : ALAS2-2022-1893
  • 354388 Amazon Linux Security Advisory for ncurses : ALAS2022-2022-217
  • 354530 Amazon Linux Security Advisory for ncurses : ALAS-2022-217
  • 354584 Amazon Linux Security Advisory for ncurses : ALAS-2022-217
  • 355115 Amazon Linux Security Advisory for ncurses : ALAS2023-2023-023
  • 500419 Alpine Linux Security Update for ncurses
  • 501440 Alpine Linux Security Update for ncurses
  • 504176 Alpine Linux Security Update for ncurses
  • 6000372 Debian Security Update for ncurses (DLA 3682-1)
  • 671146 EulerOS Security Update for ncurses (EulerOS-SA-2021-2806)
  • 671167 EulerOS Security Update for ncurses (EulerOS-SA-2021-2925)
  • 671169 EulerOS Security Update for ncurses (EulerOS-SA-2021-2917)
  • 671276 EulerOS Security Update for ncurses (EulerOS-SA-2022-1229)
  • 671301 EulerOS Security Update for ncurses (EulerOS-SA-2022-1210)
  • 751262 SUSE Enterprise Linux Security Update for ncurses (SUSE-SU-2021:3491-1)
  • 751270 OpenSUSE Security Update for ncurses (openSUSE-SU-2021:3490-1)
  • 751302 OpenSUSE Security Update for ncurses (openSUSE-SU-2021:1417-1)
  • 900343 Common Base Linux Mariner (CBL-Mariner) Security Update for ncurses (5935)
  • 901633 Common Base Linux Mariner (CBL-Mariner) Security Update for ncurses (6740-1)

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