Filtered by vendor Putty Subscriptions
Filtered by product Putty Subscriptions
Total 32 CVE
CVE Vendors Products Updated CVSS v3.1
CVE-2024-31497 6 Fedoraproject, Filezilla-project, Putty and 3 more 6 Fedora, Filezilla Client, Putty and 3 more 2025-03-27 5.9 Medium
In PuTTY 0.68 through 0.80 before 0.81, biased ECDSA nonce generation allows an attacker to recover a user's NIST P-521 secret key via a quick attack in approximately 60 signatures. This is especially important in a scenario where an adversary is able to read messages signed by PuTTY or Pageant. The required set of signed messages may be publicly readable because they are stored in a public Git service that supports use of SSH for commit signing, and the signatures were made by Pageant through an agent-forwarding mechanism. In other words, an adversary may already have enough signature information to compromise a victim's private key, even if there is no further use of vulnerable PuTTY versions. After a key compromise, an adversary may be able to conduct supply-chain attacks on software maintained in Git. A second, independent scenario is that the adversary is an operator of an SSH server to which the victim authenticates (for remote login or file copy), even though this server is not fully trusted by the victim, and the victim uses the same private key for SSH connections to other services operated by other entities. Here, the rogue server operator (who would otherwise have no way to determine the victim's private key) can derive the victim's private key, and then use it for unauthorized access to those other services. If the other services include Git services, then again it may be possible to conduct supply-chain attacks on software maintained in Git. This also affects, for example, FileZilla before 3.67.0, WinSCP before 6.3.3, TortoiseGit before 2.15.0.1, and TortoiseSVN through 1.14.6.
CVE-2021-36367 1 Putty 1 Putty 2024-11-21 8.1 High
PuTTY through 0.75 proceeds with establishing an SSH session even if it has never sent a substantive authentication response. This makes it easier for an attacker-controlled SSH server to present a later spoofed authentication prompt (that the attacker can use to capture credential data, and use that data for purposes that are undesired by the client user).
CVE-2021-33500 2 Microsoft, Putty 2 Windows, Putty 2024-11-21 7.5 High
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.
CVE-2020-14002 3 Fedoraproject, Netapp, Putty 3 Fedora, Oncommand Unified Manager Core Package, Putty 2024-11-21 5.9 Medium
PuTTY 0.68 through 0.73 has an Observable Discrepancy leading to an information leak in the algorithm negotiation. This allows man-in-the-middle attackers to target initial connection attempts (where no host key for the server has been cached by the client).
CVE-2019-9898 5 Debian, Fedoraproject, Netapp and 2 more 5 Debian Linux, Fedora, Oncommand Unified Manager and 2 more 2024-11-21 N/A
Potential recycling of random numbers used in cryptography exists within PuTTY before 0.71.
CVE-2019-9897 5 Debian, Fedoraproject, Netapp and 2 more 5 Debian Linux, Fedora, Oncommand Unified Manager and 2 more 2024-11-21 N/A
Multiple denial-of-service attacks that can be triggered by writing to the terminal exist in PuTTY versions before 0.71.
CVE-2019-9896 3 Microsoft, Opensuse, Putty 4 Windows, Backports Sle, Leap and 1 more 2024-11-21 7.8 High
In PuTTY versions before 0.71 on Windows, local attackers could hijack the application by putting a malicious help file in the same directory as the executable.
CVE-2019-9895 3 Fedoraproject, Opengroup, Putty 3 Fedora, Unix, Putty 2024-11-21 N/A
In PuTTY versions before 0.71 on Unix, a remotely triggerable buffer overflow exists in any kind of server-to-client forwarding.
CVE-2019-9894 5 Debian, Fedoraproject, Netapp and 2 more 5 Debian Linux, Fedora, Oncommand Unified Manager and 2 more 2024-11-21 N/A
A remotely triggerable memory overwrite in RSA key exchange in PuTTY before 0.71 can occur before host key verification.
CVE-2019-17069 3 Netapp, Opensuse, Putty 3 Oncommand Unified Manager Core Package, Leap, Putty 2024-11-21 7.5 High
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.
CVE-2019-17068 2 Opensuse, Putty 2 Leap, Putty 2024-11-21 7.5 High
PuTTY before 0.73 mishandles the "bracketed paste mode" protection mechanism, which may allow a session to be affected by malicious clipboard content.
CVE-2019-17067 2 Microsoft, Putty 2 Windows, Putty 2024-11-21 9.8 Critical
PuTTY before 0.73 on Windows improperly opens port-forwarding listening sockets, which allows attackers to listen on the same port to steal an incoming connection.