CVE-2021-3466

2021-03-2500:00:00

ubuntu.com

libmicrohttpd

buffer overflow

remote attacker

data confidentiality

data integrity

system availability

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

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

CVSS3

9.8

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS

0.004

Percentile

72.2%

JSON

A flaw was found in libmicrohttpd. A missing bounds check in the
post_process_urlencoded function leads to a buffer overflow, allowing a
remote attacker to write arbitrary data in an application that uses
libmicrohttpd. The highest threat from this vulnerability is to data
confidentiality and integrity as well as system availability. Only version
0.9.70 is vulnerable.