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openSUSE-SU-2026:21814-1

Опубликовано: 08 сент. 2026
Источник: suse-cvrf

Описание

Security update for zk

This update for zk fixes the following issues:

Changes in zk:

  • Update Go vendored dependencies to resolve security issues (boo#1278625, boo#1278447):
    • Upgrade golang.org/x/crypto to v0.56.0 to fix security vulnerabilities in the embedded x/crypto/ssh package:
      • CVE-2026-56854: authentication bypass
      • CVE-2026-56855: deadlock vulnerability
      • CVE-2026-78662: deadlock vulnerability

Список пакетов

openSUSE Leap 16.0
zk-0.15.6-bp160.2.1

Ссылки

Описание

The source-address critical option in the Permissions returned by an authentication callback was only enforced for the PublicKeyCallback and VerifiedPublicKeyCallback paths, extending the fix for CVE-2026-46595. Permissions returned by the PasswordCallback, KeyboardInteractiveCallback, NoClientAuthCallback, and GSSAPIWithMICConfig.AllowLogin callbacks were not validated against the client's remote address, so a source-address restriction set by those callbacks was silently ignored. The check is now applied to the Permissions returned by any authentication callback.

Затронутые продукты
openSUSE Leap 16.0:zk-0.15.6-bp160.2.1
Ссылки

Описание

Previously, after a channel has been established, a malicious peer could send crafted messages that would deadlock the entire connection. Now, we handle all RFC 4254 channel messages; global requests are handled explicitly. Then, treat all other messages as a protocol error and tear the connection down instead of buffering and blocking.

Затронутые продукты
openSUSE Leap 16.0:zk-0.15.6-bp160.2.1
Ссылки

Описание

Previously, a channel registered in the mux's chanList is not usable until it is established. A malicious peer was able flood the channel's incomingRequests, deadlocking the entire connection. Now, we add an atomic established state, set when a channel becomes usable. Until such a time, handlePacket drops every packet other than the open confirmation/failure, without blocking and without tearing down the connection.

Затронутые продукты
openSUSE Leap 16.0:zk-0.15.6-bp160.2.1
Ссылки