CVE-2013-4852
Integer overflow in PuTTY 0.62 and earlier, WinSCP before 5.1.6, and other products that use PuTTY allows remote SSH servers to cause a denial of service (crash) and possibly execute arbitrary code in certain applications that use PuTTY via a negative size value in an RSA key signature during the SSH handshake, which triggers a heap-based buffer overflow.
Key facts
- CVSS score
- 6.8 (v2.0)
- Severity
- MEDIUM
- CVSS vector
AV:N/AC:M/Au:N/C:P/I:P/A:P- Weakness (CWE)
- CWE-189
- EPSS score
- 3.4% (89th percentile)
- In CISA KEV
- No
- In EU EUVD
- Yes (EUVD-2013-4697)
- Published
- August 19, 2013
- NVD last modified
- June 16, 2026
- Status
- Modified
EU Vulnerability Database (EUVD)
This vulnerability is also tracked by ENISA as EUVD-2013-4697 in the EU Vulnerability Database. Last updated in EUVD on August 6, 2024.
View on the EU Vulnerability DatabaseAffected products
- debian / debian linux
- debian / debian linux
- debian / debian linux
- opensuse / opensuse
- putty / putty
- putty / putty
- putty / putty
- putty / putty
- putty / putty
- putty / putty
- putty / putty
- putty / putty
- putty / putty
- putty / putty
- putty / putty
- putty / putty
- putty / putty
- putty / putty
- putty / putty
- putty / putty
- putty / putty
- putty / putty
- simon tatham / putty
- simon tatham / putty
- winscp / winscp
- winscp / winscp
- winscp / winscp
- winscp / winscp
- winscp / winscp
- winscp / winscp
- winscp / winscp
- winscp / winscp
- winscp / winscp
- winscp / winscp
- winscp / winscp
- winscp / winscp
- winscp / winscp
- winscp / winscp
- winscp / winscp
- winscp / winscp
- winscp / winscp
- winscp / winscp
- winscp / winscp
- winscp / winscp
- winscp / winscp
- winscp / winscp
- winscp / winscp
- winscp / winscp
- winscp / winscp
- winscp / winscp
and 7 more…
References
- http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=718779
- http://lists.opensuse.org/opensuse-updates/2013-08/msg00035.html
- http://lists.opensuse.org/opensuse-updates/2013-08/msg00041.html
- http://secunia.com/advisories/54379(Vendor Advisory)
- http://secunia.com/advisories/54517
- http://secunia.com/advisories/54533
- http://svn.tartarus.org/sgt?view=revision&sortby=date&revision=9896
- http://winscp.net/tracker/show_bug.cgi?id=1017
- http://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/vuln-signature-stringlen.html(Vendor Advisory)
- http://www.debian.org/security/2013/dsa-2736
- http://www.search-lab.hu/advisories/secadv-20130722
Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS
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