PT-2021-17025 · Cesanta+1 · Cesanta Mongoose Https Server+1

Cve-Reporting · Published 2021-02-08 · Updated 2021-02-12 · CVE-2021-26530

Positive Technologies (AI Summary)

CVSS v3.1

9.1

Critical

Base vector

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

Name of the Vulnerable Software and Affected Versions Cesanta Mongoose HTTPS server version 7.0

Description The issue concerns a remote out-of-bounds (OOB) write attack via a connection request after exhausting the memory pool. This is related to the mg tls init function in the Cesanta Mongoose HTTPS server when compiled with OpenSSL support.

Recommendations For Cesanta Mongoose HTTPS server version 7.0, consider disabling the mg tls init function as a temporary workaround until a patch is available. Restrict access to the server to minimize the risk of exploitation. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Memory Corruption

Weakness Enumeration

CWE-787

Related Identifiers

CVE-2021-26530

Affected Products

Cesanta Mongoose Https Server

Openssl

References · 7

• 🔥 https://github.com/cesanta/mongoose/issues/1204 · Exploit
• https://osv.dev/vulnerability/DEBIAN-CVE-2021-26530 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-26530 · Security Note
• https://osv.dev/vulnerability/CVE-2021-26530 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2021-26530 · Vendor Advisory
• https://t.me/cibsecurity/23270 · Telegram Post
• https://t.me/cvenotify/9621 · Telegram Post