In PuTTY versions before 0.71 on Unix, a remotely triggerable buffer overflow exists in any kind of server-to-client forwarding.
Max CVSS
9.8
EPSS Score
1.63%
Published
2019-03-21
Updated
2019-04-05
The ssh_agent_channel_data function in PuTTY before 0.68 allows remote attackers to have unspecified impact via a large length value in an agent protocol message and leveraging the ability to connect to the Unix-domain socket representing the forwarded agent connection, which trigger a buffer overflow.
Max CVSS
9.8
EPSS Score
40.91%
Published
2017-03-27
Updated
2018-10-30
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.
Max CVSS
6.8
EPSS Score
2.72%
Published
2013-08-19
Updated
2021-08-06
Buffer overflow in sshbn.c in PuTTY before 0.63 allows remote SSH servers to cause a denial of service (crash) via an invalid DSA signature that is not properly handled during computation of a modular inverse and triggers the overflow during a division by zero by the bignum functionality, a different vulnerability than CVE-2013-4206.
Max CVSS
4.3
EPSS Score
0.82%
Published
2013-08-19
Updated
2021-08-06
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.
Max CVSS
6.8
EPSS Score
1.48%
Published
2013-08-19
Updated
2021-08-06
PuTTY 0.59 through 0.61 does not clear sensitive process memory when managing user replies that occur during keyboard-interactive authentication, which might allow local users to read login passwords by obtaining access to the process' memory.
Max CVSS
2.1
EPSS Score
0.04%
Published
2013-08-23
Updated
2019-03-21
Integer signedness error in the ssh2_rdpkt function in PuTTY before 0.56 allows remote attackers to execute arbitrary code via a SSH2_MSG_DEBUG packet with a modified stringlen parameter, which leads to a buffer overflow.
Max CVSS
10.0
EPSS Score
12.09%
Published
2005-01-10
Updated
2017-07-11

CVE-2002-1359

Public exploit
Multiple SSH2 servers and clients do not properly handle large packets or large fields, which may allow remote attackers to cause a denial of service or possibly execute arbitrary code via buffer overflow attacks, as demonstrated by the SSHredder SSH protocol test suite.
Max CVSS
10.0
EPSS Score
97.18%
Published
2002-12-23
Updated
2017-10-11
Multiple SSH2 servers and clients do not properly handle packets or data elements with incorrect length specifiers, which may allow remote attackers to cause a denial of service or possibly execute arbitrary code, as demonstrated by the SSHredder SSH protocol test suite.
Max CVSS
10.0
EPSS Score
19.30%
Published
2002-12-23
Updated
2017-10-11
9 vulnerabilities found
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