CVE-2013-4206

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.

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.

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.

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.

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.

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.

PuTTY versions 0.62 and earlier - as well as all software that integrates these versions of PuTTY - are vulnerable to an integer overflow leading to heap overflow during the SSH handshake before authentication, caused by improper bounds checking of the length parameter received from the SSH server. This allows remote attackers to cause denial of service, and may have more severe impact on the operation of software that uses PuTTY code (CVE-2013-4852).

PuTTY versions 0.62 and earlier - as well as all software that integrates these versions of PuTTY - are vulnerable to a heap-corrupting buffer underrun bug in the modmul function which performs modular multiplication (CVE-2013-4206).

PuTTY versions 0.62 and earlier - as well as all software that integrates these versions of PuTTY - are vulnerable to a buffer overflow vulnerability in the calculation of modular inverses when verifying a DSA signature (CVE-2013-4207).

PuTTY versions 0.62 and earlier - as well as all software that integrates these versions of PuTTY - are vulnerable to private keys left in memory after being used by PuTTY tools (CVE-2013-4208).

These are all security issues fixed in the filezilla-3.23.0.2-1.1 package on the GA media of openSUSE Tumbleweed.