Heap-based buffer overflow in winscp.sourceforge.net products - CVE-2013-4852
Published: August 20, 2013 / Updated: August 10, 2020
Vulnerability identifier: #VU42653
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2013-4852
CWE-ID: CWE-122
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error in Integer overflow in PuTTY 0.62 and earlier, WinSCP before 5.1.6, and other products that use PuTTY. A remote attacker can use a negative size value in an RSA key signature during the SSH handshake to trigger heap-based buffer overflow and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Affected software
PuTTY
Debian Linux
Opensuse
Gentoo Linux
Fedora
WinSCP
putty
filezilla
Debian Linux
Opensuse
Gentoo Linux
Fedora
WinSCP
putty
filezilla
How to mitigate CVE-2013-4852
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.
putty - addressed in versions 0.63-3.el5, 0.63-3.el6
filezilla - update to 3.7.3-1.el6
filezilla - update to 3.7.3-1.el6
External 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
- 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
- http://www.debian.org/security/2013/dsa-2736
- http://www.search-lab.hu/advisories/secadv-20130722