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CVE-2022-26495

Published: 6 March 2022

In nbd-server in nbd before 3.24, there is an integer overflow with a resultant heap-based buffer overflow. A value of 0xffffffff in the name length field will cause a zero-sized buffer to be allocated for the name, resulting in a write to a dangling pointer. This issue exists for the NBD_OPT_INFO, NBD_OPT_GO, and NBD_OPT_EXPORT_NAME messages.

Priority

Medium

Cvss 3 Severity Score

9.8

Score breakdown

Status

Package Release Status
nbd
Launchpad, Ubuntu, Debian
bionic
Released (1:3.16.2-1ubuntu0.2)
focal
Released (1:3.20-1ubuntu0.1)
impish
Released (1:3.21-1ubuntu0.1)
kinetic
Released (1:3.23-3ubuntu1)
lunar
Released (1:3.23-3ubuntu1)
trusty Needed

upstream Needs triage

xenial Needed

jammy
Released (1:3.23-3ubuntu1)
mantic
Released (1:3.23-3ubuntu1)
Patches:
upstream: https://sourceforge.net/p/nbd/code/ci/4e5c5d2ed71cc9c34559e5fbeeb7f390661e530c/

Severity score breakdown

Parameter Value
Base score 9.8
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H