Description
PuTTY 0.59 through 0.61 does not clear sensitive process memory when managing user replies that occur during keyboard-interactive authentication, which might allow local users to read login passwords by obtaining access to the process' memory.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | putty | 0.62-1 | — |
| Debian 13 | putty | 0.62-1 | — |
| Debian 12 | putty | 0.62-1 | — |
References
- [oss-security] 20111212 Re: CVE request: putty does not wipe keyboard-interactive replies from memory after authentication mailing-list
- [oss-security] 20111212 CVE request: putty does not wipe keyboard-interactive replies from memory after authentication mailing-list
- http://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/password-not-wiped.html