Vulnerability CVE-2016-2563
Published: 2016-04-07   Modified: 2016-04-08

Description:
Stack-based buffer overflow in the SCP command-line utility in PuTTY before 0.67 and KiTTY 0.66.6.3 and earlier allows remote servers to cause a denial of service (stack memory corruption) or execute arbitrary code via a crafted SCP-SINK file-size response to an SCP download request.

See advisories in our WLB2 database:
Topic
Author
Date
High
Putty pscp <= 0.66 - Stack Buffer Overwrite
tintinweb
11.03.2016

Type:

CWE-121

 (Stack-based Buffer Overflow)

CVSS2 => (AV:N/AC:L/Au:N/C:P/I:P/A:P)

CVSS Base Score
Impact Subscore
Exploitability Subscore
7.5/10
6.4/10
10/10
Exploit range
Attack complexity
Authentication
Remote
Low
No required
Confidentiality impact
Integrity impact
Availability impact
Partial
Partial
Partial
Affected software
Simon tatham -> Putty 
9BIS -> Kitty 

 References:
http://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/vuln-pscp-sink-sscanf.html
https://security.gentoo.org/glsa/201606-01
https://github.com/tintinweb/pub/tree/master/pocs/cve-2016-2563
http://seclists.org/fulldisclosure/2016/Mar/22
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