What’s Vulnerable › Vulnerabilities

CVE-2018-15560

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.8% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2018-08-20 · updated 2026-06-17
• Weakness: CWE-190

Description

PyCryptodome before 3.6.6 has an integer overflow in the data_len variable in AESNI.c, related to the AESNI_encrypt and AESNI_decrypt functions, leading to the mishandling of messages shorter than 16 bytes.

Affected products

• Pycryptodome: before 3.6.6 — fixed in 3.6.6

How to fix

Upgrade to a fixed version: Pycryptodome 3.6.6. Check the vendor advisory for mitigations.

References

• https://github.com/Legrandin/pycryptodome/issues/198
• https://whitehatck01.blogspot.com/2018/08/integer-overflow-vulnerability-in.html
• https://github.com/Legrandin/pycryptodome/issues/198
• https://whitehatck01.blogspot.com/2018/08/integer-overflow-vulnerability-in.html

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