CVE-2021-3466

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.
Classic Buffer Overflow
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
9.8 CRITICAL
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
redhatCNA
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CVEADP
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Base Score
CVSS 3.x
EPSS Score
Percentile: 60%
VendorProductVersion
gnulibmicrohttpd
0.9.70
redhatenterprise_linux
6.0
redhatenterprise_linux
7.0
redhatenterprise_linux
8.0
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
libmicrohttpd
bullseye
0.9.72-2+deb11u1
fixed
buster
not-affected
stretch
not-affected
bookworm
0.9.75-6
fixed
sid
1.0.1-2
fixed
trixie
1.0.1-2
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
libmicrohttpd
groovy
not-affected
focal
not-affected
bionic
not-affected
xenial
not-affected
trusty
not-affected