CVE-2015-7744

wolfSSL (formerly CyaSSL) before 3.6.8 does not properly handle faults associated with the Chinese Remainder Theorem (CRT) process when allowing ephemeral key exchange without low memory optimizations on a server, which makes it easier for remote attackers to obtain private RSA keys by capturing TLS handshakes, aka a Lenstra attack.

CVSS v3.1

5.9 MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

CVSS v2.0

2.6 LOWAV:N/AC:H/Au:N/C:P/I:N/A:N

EPSS

5.03% chance of exploitation in the next 30 days, 92th percentile

Published

2016-01-22

Updated

2024-08-06

Proof-of-concept exploits (1)

• https://securityblog.redhat.com/2015/09/02/factoring-rsa-keys-with-tls-perfect-forward-se…

References

• CVE Record
• NVD entry

Related

• CVE-2015-7743
• CVE-2015-7755
• CVE-2015-7724
• CVE-2015-7765
• CVE-2015-7723
• CVE-2015-7766