Buffer overflow in Apple macOS
CVE-2021-39537
An issue was discovered in ncurses through v6.2-1. _nc_captoinfo in captoinfo.c has a heap-based buffer overflow.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.032 (87.8th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 88th percentile — 87.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.032 · newest: 0.032 · change: 0.000
Affected products
- Apple macOS — versions 11.7, 13.0
- Apple Mac OS X — versions 10.12.6
- GNU Ncurses
- Invisible-Island Ncurses
Weakness classification (CWE)
Public proof-of-concept exploits
References
- lists.gnu.org/archive/html/bug-ncurses/2020-08/msg00006.html (Exploit, Mailing List, Vendor Advisory)
- lists.gnu.org/archive/html/bug-ncurses/2021-10/msg00023.html (Mailing List, Vendor Advisory)
- cvsweb.netbsd.org/bsdweb.cgi/pkgsrc/devel/ncurses/patches/patch-ncurses_tinfo_c… (Patch, Third Party Advisory)
- support.apple.com/kb/HT213443 (Third Party Advisory)
- support.apple.com/kb/HT213444 (Third Party Advisory)
- support.apple.com/kb/HT213488 (Third Party Advisory)
- seclists.org/fulldisclosure/2022/Oct/41 (mailing-list, Mailing List, Third Party Advisory)
- seclists.org/fulldisclosure/2022/Oct/28 (mailing-list, Mailing List, Third Party Advisory)
- seclists.org/fulldisclosure/2022/Oct/43 (mailing-list, Mailing List, Third Party Advisory)
- seclists.org/fulldisclosure/2022/Oct/45 (mailing-list, Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-39537?
- CVE-2021-39537 is a high-severity vulnerability in Apple macOS, classified under Out-of-bounds Write. CVSS score: 8.8/10. Published 2021-09-20.
- How severe is CVE-2021-39537?
- High severity. CVSS v3 base score is 8.8 out of 10.
- Is CVE-2021-39537 known to be exploited?
- 7 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.