#VU42632 Buffer overflow in PuTTY - CVE-2011-4607

Vulnerability identifier: #VU42632

Vulnerability risk: Low

CVSSv4.0: 1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2011-4607

CWE-ID: CWE-119

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
PuTTY
Client/Desktop applications / Software for system administration

Vendor: Simon Tatham

Description

The vulnerability allows a remote non-authenticated attacker to gain access to sensitive information.

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.

Mitigation
Install update from vendor's website.

Vulnerable software versions

PuTTY: 0.59 - 0.61

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External links
https://seclists.org/oss-sec/2011/q4/499
https://seclists.org/oss-sec/2011/q4/500
https://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/password-not-wiped.html

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.