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Integer overflow in the terminal emulator in PuTTY before 0.66 allows remote attackers to cause a denial of service (memory corruption) or possibly execute arbitrary code via an ECH (erase characters) escape sequence with a large parameter value, which triggers a buffer underflow.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | — | Upgrade putty | Aug 30, 2017 | Dec 7, 2015 |
| Debian | — | Upgrade putty | Dec 7, 2015 | Dec 1, 2015 |
| Freebsd | — | Upgrade putty | Dec 10, 2025 | Nov 9, 2015 |
| Gentoo Linux | — | Upgrade net-misc/putty. | Oct 30, 2017 | Dec 7, 2015 |
| Suse | — | Upgrade putty-debugsourceUpgrade puttyUpgrade putty-debuginfo | Dec 18, 2015 | Nov 18, 2015 |
| Ubuntu | — | Upgrade putty | Nov 19, 2024 | Dec 7, 2015 |
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