CVE-2020-12651

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 6.6% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2020-05-15 · updated 2026-06-17
Weakness: CWE-190

Description

SecureCRT before 8.7.2 allows remote attackers to execute arbitrary code via an Integer Overflow and a Buffer Overflow because a banner can trigger a line number to CSI functions that exceeds INT_MAX.

Affected products

Vandyke Securecrt: before 8.7.2; before 2.4 — fixed in 2.4, 8.7.2

How to fix

Upgrade to a fixed version: Vandyke Securecrt 2.4, 8.7.2. Check the vendor advisory for mitigations.

References

https://bugs.chromium.org/p/project-zero/issues/detail?id=2033
https://twitter.com/taviso/status/1261079774190919680
https://www.vandyke.com/products/securecrt/history.txt
https://www.vandyke.com/support/advisory/index.html
https://bugs.chromium.org/p/project-zero/issues/detail?id=2033
https://twitter.com/taviso/status/1261079774190919680
https://www.vandyke.com/products/securecrt/history.txt
https://www.vandyke.com/support/advisory/index.html

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