Buffer overflow in 9bis Kitty
CVE-2016-2563
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 f…
Vulnerability class: Buffer Overflow
EPSS: 0.266 (96.4th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- 9bis Kitty
- Simon_tatham Putty
- N/a — versions n/a
Weakness classification (CWE)
Public proof-of-concept exploits
References
- openSUSE-SU-2016:1453 (vendor-advisory, x_refsource_SUSE)
- 1035257 (vdb-entry, x_refsource_SECTRACK)
- GLSA-201606-01 (vendor-advisory, x_refsource_GENTOO)
- 84296 (vdb-entry, x_refsource_BID)
- cve@mitre.org (x_refsource_CONFIRM, Patch)
- cve@mitre.org (x_refsource_MISC, Vendor Advisory)
- 20160309 CVE-2016-2563 - PuTTY/PSCP <=0.66 buffer overflow - vuln-pscp-sink-sscanf (mailing-list, x_refsource_FULLDISC)
Frequently asked questions
- What is CVE-2016-2563?
- CVE-2016-2563 is a critical-severity vulnerability in 9bis Kitty, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 9.8/10. Published 2016-04-07.
- How severe is CVE-2016-2563?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2016-2563 known to be exploited?
- 4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.