Critical severity · published Mar 25, 2021
CVE-2021-3466
A flaw was found in libmicrohttpd
9.8
CVSS
8.7%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)8.7% · higher than 95% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
EL
Enterprise Linux · Redhat
6.0; 7.0; 8.0 · source: NVD
FE
Fedora · Fedoraproject
32; 33; 34 · source: NVD
LI
Libmicrohttpd · Gnu
0.9.70 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-3466
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-3466
Issue Tracking
https://bugzilla.redhat.com/show_bug.cgi?id=1939127
lists.fedoraproject.org
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4334XJNDJPYQNFE6S3S2KUJJ7TMHYCWL/
lists.fedoraproject.org
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/75HDMREKITMGPGE62NP7KE62ZJVLETXN/
lists.fedoraproject.org
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/K5NEPVGP3L2CZHLZ4UB44PEILHKPDBOG/
security.gentoo.org
https://security.gentoo.org/glsa/202311-08
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