CVE-2021-3466
Critical
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.
SeverityCritical
CVSS9.8
Exploit probability—
Product
Gnu Libmicrohttpd
PublishedMar 25, 2021
First seenMar 25, 2021
Weakness typeCWE-120CWE-120
How to fix
Vendor advisories
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4334XJNDJPYQNFE6S3S2KUJJ7TMHYCWL/
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/K5NEPVGP3L2CZHLZ4UB44PEILHKPDBOG/
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/75HDMREKITMGPGE62NP7KE62ZJVLETXN/
- security.gentoo.org/glsa/202311-08
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| gnu libmicrohttpd | 0.9.70 | — |
| redhat enterprise_linux | 6.0, 7.0, 8.0 | — |
| fedoraproject fedora | 32, 33, 34 | — |
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