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Ncurses CVE-2021-39537

HIGH
Out-of-bounds Write (CWE-787)
2021-09-20 cve@mitre.org
8.8
CVSS 3.1 · NVD
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Severity by source

NVD PRIMARY
8.8 HIGH
AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

1
CVE Published
Sep 20, 2021 - 16:15 nvd
HIGH 8.8

DescriptionNVD

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

AnalysisAI

An issue was discovered in ncurses through v6.2-1. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available.

Technical ContextAI

This vulnerability is classified as Out-of-bounds Write (CWE-787), which allows attackers to write data beyond allocated buffer boundaries leading to code execution or crashes. An issue was discovered in ncurses through v6.2-1. _nc_captoinfo in captoinfo.c has a heap-based buffer overflow. Affected products include: Gnu Ncurses, Apple Mac Os X, Apple Macos.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Validate write boundaries, use memory-safe languages, enable compiler protections (ASLR, stack canaries).

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CVE-2017-13732 MEDIUM POC
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CVE-2017-13730 MEDIUM POC
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CVE-2017-13734 MEDIUM POC
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There is an illegal address access in the _nc_safe_strcat function in strings.c in ncurses 6.0 that will lead to a remot

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CVE-2017-10684 CRITICAL
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In ncurses 6.0, there is a stack-based buffer overflow in the fmt_entry function. Rated critical severity (CVSS 9.8), th

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CVE-2021-39537 vulnerability details – vuln.today

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