MGASA-2024-0002 - Updated libssh2 packages fix a security vulnerability (Terrapin Attack)

Publication date: 08 Jan 2024
URL: https://advisories.mageia.org/MGASA-2024-0002.html
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 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.
Our libssh2 packages were also affected, this update fixes the issue.

References:
- https://bugs.mageia.org/show_bug.cgi?id=32662
- https://github.com/libssh2/libssh2/issues/1290
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-48795

SRPMS:
- 9/core/libssh2-1.10.0-3.1.mga9

Mageia 2024-0002: libssh2 security update

The SSH transport protocol with certain OpenSSH extensions, found in OpenSSH before 9.6 and other products, allows remote attackers to bypass integrity checks such that some packet...

Summary

The SSH transport protocol with certain OpenSSH extensions, found in OpenSSH before 9.6 and 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. Our libssh2 packages were also affected, this update fixes the issue.

References

- https://bugs.mageia.org/show_bug.cgi?id=32662

- https://github.com/libssh2/libssh2/issues/1290

- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-48795

Resolution

MGASA-2024-0002 - Updated libssh2 packages fix a security vulnerability (Terrapin Attack)

SRPMS

- 9/core/libssh2-1.10.0-3.1.mga9

Severity
Publication date: 08 Jan 2024
URL: https://advisories.mageia.org/MGASA-2024-0002.html
Type: security
CVE: CVE-2023-48795

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