// For flags

CVE-2021-39537

Ubuntu Security Notice USN-6099-1

Severity Score

8.8
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

1
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

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

Se ha detectado un problema en ncurses versiones hasta v6.2-1. La función _nc_captoinfo en el archivo captoinfo.c presenta un desbordamiento de búfer en la región heap de la memoria

It was discovered that ncurses was incorrectly performing bounds checks when processing invalid hashcodes. An attacker could possibly use this issue to cause a denial of service or to expose sensitive information. This issue only affected Ubuntu 18.04 LTS. It was discovered that ncurses was incorrectly handling end-of-string characters when processing terminfo and termcap files. An attacker could possibly use this issue to cause a denial of service or to expose sensitive information. This issue only affected Ubuntu 18.04 LTS.

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Attack Vector
Network
Attack Complexity
Medium
Authentication
None
Confidentiality
Partial
Integrity
Partial
Availability
Partial
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2021-08-23 CVE Reserved
  • 2021-09-20 CVE Published
  • 2024-08-04 CVE Updated
  • 2024-08-04 First Exploit
  • 2025-05-25 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
CWE
  • CWE-787: Out-of-bounds Write
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Gnu
Search vendor "Gnu"
Ncurses
Search vendor "Gnu" for product "Ncurses"
<= 6.2.1
Search vendor "Gnu" for product "Ncurses" and version " <= 6.2.1"
-
Affected
Apple
Search vendor "Apple"
Mac Os X
Search vendor "Apple" for product "Mac Os X"
10.12.6
Search vendor "Apple" for product "Mac Os X" and version "10.12.6"
-
Affected
Apple
Search vendor "Apple"
Macos
Search vendor "Apple" for product "Macos"
11.7
Search vendor "Apple" for product "Macos" and version "11.7"
-
Affected
Apple
Search vendor "Apple"
Macos
Search vendor "Apple" for product "Macos"
13.0
Search vendor "Apple" for product "Macos" and version "13.0"
-
Affected