CVE-2021-39537
HIGHCVSS 8.8/10EPSS 3.23%
Last modified
CVE-2021-39537 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. An issue was discovered in ncurses through v6.2-1. _nc_captoinfo in captoinfo.c has a heap-based buffer overflow.. EPSS estimates a 3.23% chance of exploitation in the next 30 days.
Description
An issue was discovered in ncurses through v6.2-1. _nc_captoinfo in captoinfo.c has a heap-based buffer overflow.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Invisible-Island | Ncurses | <= 6.2.1 |
| Apple | Mac Os X | 10.12.6 |
| Apple | Macos | 11.7 |
| Apple | Macos | 13.0 |
References
- http://seclists.org/fulldisclosure/2022/Oct/28Mailing List, Third Party Advisory
- http://seclists.org/fulldisclosure/2022/Oct/41Mailing List, Third Party Advisory
- http://seclists.org/fulldisclosure/2022/Oct/43Mailing List, Third Party Advisory
- http://seclists.org/fulldisclosure/2022/Oct/45Mailing List, Third Party Advisory
- https://lists.gnu.org/archive/html/bug-ncurses/2020-08/msg00006.htmlExploit, Mailing List, Vendor Advisory
- https://lists.gnu.org/archive/html/bug-ncurses/2021-10/msg00023.htmlMailing List, Vendor Advisory
- https://support.apple.com/kb/HT213443Third Party Advisory
- https://support.apple.com/kb/HT213444Third Party Advisory
- https://support.apple.com/kb/HT213488Third Party Advisory
- http://seclists.org/fulldisclosure/2022/Oct/28Mailing List, Third Party Advisory
- http://seclists.org/fulldisclosure/2022/Oct/41Mailing List, Third Party Advisory
- http://seclists.org/fulldisclosure/2022/Oct/43Mailing List, Third Party Advisory
- http://seclists.org/fulldisclosure/2022/Oct/45Mailing List, Third Party Advisory
- https://lists.gnu.org/archive/html/bug-ncurses/2020-08/msg00006.htmlExploit, Mailing List, Vendor Advisory
- https://lists.gnu.org/archive/html/bug-ncurses/2021-10/msg00023.htmlMailing List, Vendor Advisory
- https://support.apple.com/kb/HT213443Third Party Advisory
- https://support.apple.com/kb/HT213444Third Party Advisory
- https://support.apple.com/kb/HT213488Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-39537?
An issue was discovered in ncurses through v6.2-1. _nc_captoinfo in captoinfo.c has a heap-based buffer overflow.
How severe is CVE-2021-39537?
CVE-2021-39537 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 3.23% probability of exploitation in the next 30 days.
How do I fix CVE-2021-39537?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2021-39537?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST