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Review reviewHigh

CVE-2021-39537

ncurses, mac os x

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

CVSS
8.8
EPSS
3.23%
87.0% percentile
CISA KEV
Not listed
Published
2021.09.21
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability3.23%
Technical severityCVSS 8.8

Vulnerability overview

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

Affected product and versions

Product
ncurses, mac os x
Affected versions
<= 6.2.1, 10.12.6, 11.7, 13.0
Fixed versions
No verified fixed-version field is available yet

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that ncurses, mac os x and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CWE
CWE-787
CVE-2021-39537 — ncurses, mac os x | SECUFOCUS NOW