| Package | Affected versions | Patched versions |
|---|---|---|
| putty | = 0.45= 0.46= 0.47= 0.48= 0.49= 0.50= 0.51= 0.52= 0.53b= 0.54= 0.55= 0.56= 0.57= 0.58= 0.59= 0.60= 0.61= 2010-06-01 | |
| putty | = 0.53≤ 0.62 |
Heap-based buffer underflow in the modmul function in sshbn.c in PuTTY before 0.63 allows remote SSH servers to cause a denial of service (crash) and possibly trigger memory corruption or code execution via a crafted DSA signature, which is not properly handled when performing certain bit-shifting operations during modular multiplication.
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