Advisories ยป MGASA-2024-0003

Updated putty package fixes a security vulnerability (Terrapin attack)

Publication date: 08 Jan 2024
Modification date: 08 Jan 2024
Type: security
Affected Mageia releases : 9
CVE: CVE-2023-48795


The SSH transport protocol with certain OpenSSH extensions, found in
OpenSSH before 9.6 and many other products, allows remote attackers to
bypass integrity checks such that some packets are omitted (from the
extension negotiation message), and a client and server may consequently
end up with a connection for which some security features have been
downgraded or disabled, aka a Terrapin attack. This occurs because the
SSH Binary Packet Protocol (BPP), implemented by these extensions,
mishandles the handshake phase and mishandles use of sequence numbers.
This update fixes putty.