Upstream information

CVE-2021-3716 at MITRE

Description

A flaw was found in nbdkit due to to improperly caching plaintext state across the STARTTLS encryption boundary. A MitM attacker could use this flaw to inject a plaintext NBD_OPT_STRUCTURED_REPLY before proxying everything else a client sends to the server, potentially leading the client to terminate the NBD session. The highest threat from this vulnerability is to system availability.

SUSE information

Overall state of this security issue: Does not affect SUSE products

This issue is currently rated as having moderate severity.

CVSS v2 Scores
  National Vulnerability Database
Base Score 3.5
Vector AV:N/AC:M/Au:S/C:N/I:N/A:P
Access Vector Network
Access Complexity Medium
Authentication Single
Confidentiality Impact None
Integrity Impact None
Availability Impact Partial
CVSS v3 Scores
  National Vulnerability Database SUSE
Base Score 3.1 3.5
Vector CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:L
Access Vector Network Network
Access Complexity High Low
Privileges Required Low Low
User Interaction None Required
Scope Unchanged Unchanged
Confidentiality Impact None None
Integrity Impact None None
Availability Impact Low Low
CVSSv3 Version 3.1 3.1
SUSE Bugzilla entry: 1189634 [RESOLVED / FIXED]

No SUSE Security Announcements cross referenced.

List of released packages

Product(s) Fixed package version(s) References
openSUSE Leap 15.4
  • nbdkit >= 1.29.4-150400.1.4
  • nbdkit-basic-filters >= 1.29.4-150400.1.4
  • nbdkit-basic-plugins >= 1.29.4-150400.1.4
  • nbdkit-curl-plugin >= 1.29.4-150400.1.4
  • nbdkit-python-plugin >= 1.29.4-150400.1.4
  • nbdkit-server >= 1.29.4-150400.1.4
  • nbdkit-ssh-plugin >= 1.29.4-150400.1.4
  • nbdkit-vddk-plugin >= 1.29.4-150400.1.4
Patchnames:
openSUSE Leap 15.4 GA nbdkit-1.29.4-150400.1.4
openSUSE Tumbleweed
  • nbdkit >= 1.27.8-1.2
  • nbdkit-bash-completion >= 1.27.8-1.2
  • nbdkit-basic-filters >= 1.27.8-1.2
  • nbdkit-basic-plugins >= 1.27.8-1.2
  • nbdkit-curl-plugin >= 1.27.8-1.2
  • nbdkit-devel >= 1.27.8-1.2
  • nbdkit-example-plugins >= 1.27.8-1.2
  • nbdkit-gzip-filter >= 1.27.8-1.2
  • nbdkit-nbd-plugin >= 1.27.8-1.2
  • nbdkit-python-plugin >= 1.27.8-1.2
  • nbdkit-server >= 1.27.8-1.2
  • nbdkit-ssh-plugin >= 1.27.8-1.2
  • nbdkit-tar-filter >= 1.27.8-1.2
  • nbdkit-tmpdisk-plugin >= 1.27.8-1.2
  • nbdkit-vddk-plugin >= 1.27.8-1.2
  • nbdkit-xz-filter >= 1.27.8-1.2
Patchnames:
openSUSE Tumbleweed GA nbdkit-1.27.8-1.2