PuTTY before 0.75 on Windows allows remote servers to cause a denial of service (Windows GUI hang) by telling the PuTTY window to change its title repeatedly at high speed, which results in many SetWindowTextA or SetWindowTextW calls. NOTE: the same attack methodology may affect some OS-level GUIs on Linux or other platforms for similar reasons.
Max CVSS
7.5
EPSS Score
0.20%
Published
2021-05-21
Updated
2021-05-27
PuTTY before 0.73 might allow remote SSH-1 servers to cause a denial of service by accessing freed memory locations via an SSH1_MSG_DISCONNECT message.
Max CVSS
7.5
EPSS Score
0.25%
Published
2019-10-01
Updated
2022-03-31
Multiple denial-of-service attacks that can be triggered by writing to the terminal exist in PuTTY versions before 0.71.
Max CVSS
7.5
EPSS Score
0.99%
Published
2019-03-21
Updated
2021-07-21
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
Multiple heap-based buffer overflows in the modpow function in PuTTY before 0.55 allow (1) remote attackers to execute arbitrary code via an SSH2 packet with a base argument that is larger than the mod argument, which causes the modpow function to write memory before the beginning of its buffer, and (2) remote malicious servers to cause a denial of service (client crash) and possibly execute arbitrary code via a large bignum during authentication.
Max CVSS
7.5
EPSS Score
8.35%
Published
2004-12-31
Updated
2017-07-11
Multiple SSH2 servers and clients do not properly handle strings with null characters in them when the string length is specified by a length field, which could allow remote attackers to cause a denial of service or possibly execute arbitrary code due to interactions with the use of null-terminated strings as implemented using languages such as C, as demonstrated by the SSHredder SSH protocol test suite.
Max CVSS
10.0
EPSS Score
4.42%
Published
2002-12-23
Updated
2017-10-11

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 lists with empty elements or strings, 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
4.42%
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
xterm, Eterm, and rxvt allow an attacker to cause a denial of service by embedding certain escape characters which force the window to be resized.
Max CVSS
5.0
EPSS Score
0.51%
Published
2000-06-01
Updated
2008-09-10
12 vulnerabilities found
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