Integer overflow in PuTTY 0.62 and earlier, WinSCP before 5.1.6, and other products that use PuTTY allows remote SSH servers to cause a denial of service (crash) and possibly execute arbitrary code in certain applications that use PuTTY via a negative size value in an RSA key signature during the SSH handshake, which triggers a heap-based buffer overflow.
2013-08-19T23:55:09.077
2025-04-11T00:51:21.963
Deferred
CVSSv2: 6.8 (MEDIUM)
AV:N/AC:M/Au:N/C:P/I:P/A:P
8.6
6.4
| Type | Vendor | Product | Version/Range | Vulnerable? |
|---|---|---|---|---|
| Application | winscp | winscp | ≤ 5.1.5 | Yes |
| Application | winscp | winscp | 3.7.6 | Yes |
| Application | winscp | winscp | 3.8.2 | Yes |
| Application | winscp | winscp | 3.8_beta | Yes |
| Application | winscp | winscp | 4.0.4 | Yes |
| Application | winscp | winscp | 4.0.5 | Yes |
| Application | winscp | winscp | 4.2.6 | Yes |
| Application | winscp | winscp | 4.2.7 | Yes |
| Application | winscp | winscp | 4.2.8 | Yes |
| Application | winscp | winscp | 4.2.9 | Yes |
| Application | winscp | winscp | 4.3.2 | Yes |
| Application | winscp | winscp | 4.3.4 | Yes |
| Application | winscp | winscp | 4.3.5 | Yes |
| Application | winscp | winscp | 4.3.6 | Yes |
| Application | winscp | winscp | 4.3.7 | Yes |
| Application | winscp | winscp | 4.3.8 | Yes |
| Application | winscp | winscp | 4.3.9 | Yes |
| Application | winscp | winscp | 4.4.0 | Yes |
| Application | winscp | winscp | 5.0 | Yes |
| Application | winscp | winscp | 5.0.1 | Yes |
| Application | winscp | winscp | 5.0.2 | Yes |
| Application | winscp | winscp | 5.0.3 | Yes |
| Application | winscp | winscp | 5.0.4 | Yes |
| Application | winscp | winscp | 5.0.5 | Yes |
| Application | winscp | winscp | 5.0.6 | Yes |
| Application | winscp | winscp | 5.0.7 | Yes |
| Application | winscp | winscp | 5.0.8 | Yes |
| Application | winscp | winscp | 5.0.9 | Yes |
| Application | winscp | winscp | 5.1 | Yes |
| Application | winscp | winscp | 5.1.1 | Yes |
| Application | winscp | winscp | 5.1.2 | Yes |
| Application | winscp | winscp | 5.1.3 | Yes |
| Application | winscp | winscp | 5.1.4 | Yes |
| Operating System | debian | debian_linux | 6.0 | Yes |
| Operating System | debian | debian_linux | 7.0 | Yes |
| Operating System | debian | debian_linux | 7.1 | Yes |
| Operating System | opensuse | opensuse | 12.3 | Yes |
| Application | putty | putty | 0.45 | Yes |
| Application | putty | putty | 0.46 | Yes |
| Application | putty | putty | 0.47 | Yes |
| Application | putty | putty | 0.48 | Yes |
| Application | putty | putty | 0.49 | Yes |
| Application | putty | putty | 0.50 | Yes |
| Application | putty | putty | 0.51 | Yes |
| Application | putty | putty | 0.52 | Yes |
| Application | putty | putty | 0.53b | Yes |
| Application | putty | putty | 0.54 | Yes |
| Application | putty | putty | 0.55 | Yes |
| Application | putty | putty | 0.56 | Yes |
| Application | putty | putty | 0.57 | Yes |
| Application | putty | putty | 0.58 | Yes |
| Application | putty | putty | 0.59 | Yes |
| Application | putty | putty | 0.60 | Yes |
| Application | putty | putty | 0.61 | Yes |
| Application | putty | putty | 2010-06-01 | Yes |
| Application | simon_tatham | putty | ≤ 0.62 | Yes |
| Application | simon_tatham | putty | 0.53 | Yes |