CVE-2016-2563 is a critical stack-based buffer overflow vulnerability affecting the SCP command-line utility in PuTTY before 0.67 and KiTTY 0.66.6.3 and earlier. A remote malicious server can exploit this by sending a crafted SCP-SINK file-size response during an SCP download, leading to denial of service or arbitrary code execution on the client. With a CVSS score of 9.8 (CRITICAL), this vulnerability is easily exploitable over the network with low complexity and no user interaction, potentially resulting in complete compromise of confidentiality, integrity, and availability. While not listed on the KEV catalog, an exploit (EDB-39551) is publicly available on ExploitDB, and it has garnered significant community discussion with 10 mentions, indicating awareness among security researchers.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
<= 0.66.6.3CPE matchmatch criteria | cpe:2.3:a:9bis:kitty:*:*:*:*:*:*:*:* | ||
<= 0.66CPE matchmatch criteria | cpe:2.3:a:simon_tatham:putty:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.0
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.