CVE-2013-4206
N/A
Published: August 19, 2013 at 11:00 PM UTC
Updated: June 16, 2026 at 11:56 PM UTC
2 products affected across 2 vendorsPuTTYPutty
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Severity
N/A
Exploit prediction
EPSS 2%
Description
Heap-based buffer underflow in the modmul function in sshbn.c in PuTTY before 0.63 allows remote SSH servers to cause a denial of service (crash) and possibly trigger memory corruption or code execution via a crafted DSA signature, which is not properly handled when performing certain bit-shifting operations during modular multiplication.
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
- http://lists.opensuse.org/opensuse-updates/2013-08/msg00035.html
- http://secunia.com/advisories/54379
- http://svn.tartarus.org/sgt/putty/sshbn.c?sortby=date&r1=9977&r2=9976&pathrev=9977
- http://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/vuln-modmul.html
- http://www.debian.org/security/2013/dsa-2736
References (7)
Vendor Advisoryx_refsource_SUSE
Source: [email protected]
http://lists.opensuse.org/opensuse-updates/2013-08/msg00035.htmlThird Party Advisoryx_refsource_SECUNIAVendor Advisory
Source: [email protected]
http://secunia.com/advisories/54379x_refsource_CONFIRMPatch
Source: [email protected]
http://svn.tartarus.org/sgt/putty/sshbn.c?sortby=date&r1=9977&r2=9976&pathrev=9977x_refsource_CONFIRMVendor Advisory
Source: [email protected]
http://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/vuln-modmul.htmlVendor Advisoryx_refsource_DEBIAN
Source: [email protected]
http://www.debian.org/security/2013/dsa-2736Mailing Listx_refsource_MLIST
Source: [email protected]
http://www.openwall.com/lists/oss-security/2013/08/06/11Quick Info
StatusMODIFIED
CWE
CWE-119
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