🛡️ CVE-2023-50981 — crypto\+\+

🟠 CVSS 7.5 — High ⚠️ Exploit Public CWE-835 NVD

7.5

CVSS Score

0 Low4 Medium7 High9 Critical10

Description

ModularSquareRoot in Crypto++ (aka cryptopp) through 8.9.0 allows attackers to cause a denial of service (infinite loop) via crafted DER public-key data associated with squared odd numbers, such as the square of 268995137513890432434389773128616504853.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality none, integrity none, availability high.

Weakness class

CVE-2023-50981 is classified as CWE-835: Infinite Loop. A loop condition can never become false for some inputs, hanging the process.

Affected software

CVE-2023-50981 is recorded against 1 package.

crypto\+\+ (fixed in 8.9.0)

Timeline and source

Published on 18 December 2023 and last revised on 17 June 2026. A public exploit is known to exist, which raises the urgency of patching considerably. Record sourced from NVD.

References

github.com
github.com

CVE-2023-50981 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Debian Ubuntu

Details

Severity HIGH

CVSS Score 7.5

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

CWE CWE-835

Public Exploit ⚠️ Yes

Source NVD

Published 2023-12-18

Updated 2026-08-11

Modified 2026-06-17

Fix URL N/A

Affected Packages

Software	From version	Fixed in
crypto\+\+	—	8.9.0

References

Exploit, Issue Tracking https://github.com/weidai11/cryptopp/issues/1249

🔗 NVD 🔗 Mitre

Exploit Protection

Are you running crypto\+\+?

CVE-2023-50981 carries CVSS 7.5 High rating and a public exploit already exists. BotEraser checks your installation against this and other known CVE records, and blocks IPs associated with exploit activity.

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