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mageiaGentoo FoundationMGASA-2024-0003
HistoryJan 08, 2024 - 1:12 p.m.

Updated putty package fixes a security vulnerability (Terrapin attack)

2024-01-0813:12:44
Gentoo Foundation
advisories.mageia.org
34
putty
ssh
openssh
terrapin attack
security vulnerability
unix
package fix
integrity checks
binary packet protocol
handshake phase
sequence numbers

5.9 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

HIGH

Availability Impact

NONE

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

6.1 Medium

AI Score

Confidence

High

0.963 High

EPSS

Percentile

99.5%

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.

OSVersionArchitecturePackageVersionFilename
Mageia9noarchputty< 0.80-1putty-0.80-1.mga9

5.9 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

HIGH

Availability Impact

NONE

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

6.1 Medium

AI Score

Confidence

High

0.963 High

EPSS

Percentile

99.5%