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githubGitHub Advisory DatabaseGHSA-32V7-GHPR-C8HG
HistoryAug 25, 2021 - 8:58 p.m.

Mishandling of format strings in ncurses

2021-08-2520:58:47
CWE-134
GitHub Advisory Database
github.com
19
ncurses
format strings
buffer overflow
ncurses library
format string attack
security vulnerability

CVSS2

6.4

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:N/AC:L/Au:N/C:N/I:P/A:P

CVSS3

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

HIGH

Availability Impact

NONE

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

EPSS

0.001

Percentile

35.9%

ncurses exposes functions from the ncurses library which:

  • Pass buffers without length to C functions that may write an arbitrary amount of data, leading to a buffer overflow. (instr, mvwinstr, etc)
  • Passes rust &str to strings expecting C format arguments, allowing hostile input to execute a format string attack, which trivially allows writing arbitrary data to stack memory (functions in the printw family).

Affected configurations

Vulners
Node
ncurses_projectncursesRange5.101.0
VendorProductVersionCPE
ncurses_projectncurses*cpe:2.3:a:ncurses_project:ncurses:*:*:*:*:*:*:*:*

CVSS2

6.4

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:N/AC:L/Au:N/C:N/I:P/A:P

CVSS3

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

HIGH

Availability Impact

NONE

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

EPSS

0.001

Percentile

35.9%