CyberSecBulletin
CVE-2022-26137NVD status: Modified

Bamboo Server: Origin Validation Error

Published Updated By the CyberSecBulletin desk

CVE-2022-26137 is a high-severity origin validation error vulnerability in Bamboo Server from Atlassian, with a CVSS 3.1 base score of 8.8 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, but only if a user takes part, for example by opening a link or file. The record lists versions 8.0.9, 8.1.8, 8.2.4 as the first without the flaw, so updating Bamboo Server to one of those releases or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 2.41% chance of exploitation within 30 days, higher than 84% of scored CVEs.

Next patch cycle

High severity with no evidence of exploitation so far.

What to do

  1. Update Bamboo Server to 8.0.9 or 8.1.8 or 8.2.4, whichever matches your release line, or a later version.
  2. Update Bamboo Data Center to 8.0.9 or 8.1.8 or 8.2.4, whichever matches your release line, or a later version.
  3. Update Bitbucket Server to 7.6.16 or 7.17.8 or 7.19.5 or 7.20.2, whichever matches your release line, or a later version.
  4. Read the advisory on jira.atlassian.com for workarounds and exact fixed builds.
  5. Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.
  6. Because the attack needs a user to take part, warn users about unexpected links and files related to this product until it is patched.

Affected products and versions

VendorProductAffected versionsFixed in
AtlassianBamboo Serverbefore 8.0.9; 8.1.0; before 8.1.8; 8.2.0; before 8.2.48.0.9, 8.1.8, 8.2.4
AtlassianBamboo Data Centerbefore 8.0.9; 8.1.0; before 8.1.8; 8.2.0; before 8.2.48.0.9, 8.1.8, 8.2.4
AtlassianBitbucket Serverbefore 7.6.16; 7.7.0; 7.16.0; before 7.17.8; 7.18.0; before 7.19.5; 7.20.0; before 7.20.2; and 4 more ranges7.6.16, 7.17.8, 7.19.5, 7.20.2, 7.21.2
AtlassianBitbucket Data Centerbefore 7.6.16; 7.7.0; 7.16.0; before 7.17.8; 7.18.0; before 7.19.5; 7.20.0; before 7.20.2; and 4 more ranges7.6.16, 7.17.8, 7.19.5, 7.20.2, 7.21.2
AtlassianConfluence Serverbefore 7.4.17; 7.5.0; before 7.13.7; 7.14.0; before 7.14.3; 7.15.0; before 7.15.2; 7.16.0; and 9 more ranges7.4.17, 7.13.7, 7.14.3, 7.15.2, 7.16.4, 7.17.4
AtlassianConfluence Data Centerbefore 7.4.17; 7.5.0; before 7.13.7; 7.14.0; before 7.14.3; 7.15.0; before 7.15.2; 7.16.0; and 9 more ranges7.4.17, 7.13.7, 7.14.3, 7.15.2, 7.16.4, 7.17.4
AtlassianCrowd Serverbefore 4.3.8; 4.4.0; before 4.4.2; 5.0.04.3.8, 4.4.2
AtlassianCrowd Data Centerbefore 4.3.8; 4.4.0; before 4.4.2; 5.0.04.3.8, 4.4.2
AtlassianCruciblebefore 4.8.104.8.10
AtlassianFisheyebefore 4.8.104.8.10
AtlassianJira Core Serverbefore 8.13.22; 8.14.0; before 8.20.10; 8.21.0; before 8.22.48.13.22, 8.20.10, 8.22.4
AtlassianJira Software Serverbefore 8.13.22; 8.14.0; before 8.20.10; 8.21.0; before 8.22.48.13.22, 8.20.10, 8.22.4
AtlassianJira Software Data Centerbefore 8.13.22; 8.14.0; before 8.20.10; 8.21.0; before 8.22.48.13.22, 8.20.10, 8.22.4
AtlassianJira Service Management Serverbefore 4.13.22; 4.14.0; before 4.20.10; 4.21.0; before 4.22.44.13.22, 4.20.10, 4.22.4
AtlassianJira Service Management Data Centerbefore 4.13.22; 4.14.0; before 4.20.10; 4.21.0; before 4.22.44.13.22, 4.20.10, 4.22.4
Atlassianbamboo7.2.0 up to, but not including, 7.2.10; 8.0.0 up to, but not including, 8.0.9; 8.1.0 up to, but not including, 8.1.8; 8.2.0 up to, but not including, 8.2.47.2.10, 8.0.9, 8.1.8, 8.2.4
Atlassianbitbucketbefore 7.6.16; 7.7.0 up to, but not including, 7.17.8; 7.18.0 up to, but not including, 7.19.5; 7.20.1 up to, but not including, 7.20.2; 7.21.0 up to, but not including, 7.21.2; 8.0.0; 8.1.07.6.16, 7.17.8, 7.19.5, 7.20.2, 7.21.2
Atlassiancrowdbefore 4.3.8; 4.4.0 up to, but not including, 4.4.2; 5.0.04.3.8, 4.4.2
Atlassianjira_data_center8.13.0 up to, but not including, 8.13.22; 8.14.0 up to, but not including, 8.20.10; 8.21.0 up to, but not including, 8.22.48.13.22, 8.20.10, 8.22.4
Atlassianjira_server8.13.0 up to, but not including, 8.13.22; 8.14.0 up to, but not including, 8.20.10; 8.21.0 up to, but not including, 8.22.48.13.22, 8.20.10, 8.22.4
Atlassianjira_service_deskbefore 4.13.224.13.22
Atlassianjira_service_management4.14.0 up to, but not including, 4.20.10; 4.21.0 up to, but not including, 4.22.44.20.10, 4.22.4

Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.

How the severity score breaks down

Attack vector
NetworkCan be exploited remotely over a network, including the internet.
Attack complexity
LowNo special conditions are needed; the attack works reliably.
Privileges required
NoneNo account or login is needed.
User interaction
RequiredA user must take an action such as opening a file or link.
Scope
UnchangedImpact stays within the vulnerable component.
Confidentiality
HighAll data handled by the component can be read.
Integrity
HighData or code can be modified at will.
Availability
HighThe component can be taken down completely.

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H. Scored by NVD.

Scoring systemScoreSeverityScored by
CVSS 3.18.8HighNVD
CVSS 3.18.8HighCISA (ADP)

Official description

A vulnerability in multiple Atlassian products allows a remote, unauthenticated attacker to cause additional Servlet Filters to be invoked when the application processes requests or responses. Atlassian has confirmed and fixed the only known security issue associated with this vulnerability: Cross-origin resource sharing (CORS) bypass. Sending a specially crafted HTTP request can invoke the Servlet Filter used to respond to CORS requests, resulting in a CORS bypass. An attacker that can trick a user into requesting a malicious URL can access the vulnerable application with the victim’s permissions. Atlassian Bamboo versions are affected before 8.0.9, from 8.1.0 before 8.1.8, and from 8.2.0 before 8.2.4. Atlassian Bitbucket versions are affected before 7.6.16, from 7.7.0 before 7.17.8, from 7.18.0 before 7.19.5, from 7.20.0 before 7.20.2, from 7.21.0 before 7.21.2, and versions 8.0.0 and 8.1.0. Atlassian Confluence versions are affected before 7.4.17, from 7.5.0 before 7.13.7, from 7.14.0 before 7.14.3, from 7.15.0 before 7.15.2, from 7.16.0 before 7.16.4, from 7.17.0 before 7.17.4, and version 7.21.0. Atlassian Crowd versions are affected before 4.3.8, from 4.4.0 before 4.4.2, and version 5.0.0. Atlassian Fisheye and Crucible versions before 4.8.10 are affected. Atlassian Jira versions are affected before 8.13.22, from 8.14.0 before 8.20.10, and from 8.21.0 before 8.22.4. Atlassian Jira Service Management versions are affected before 4.13.22, from 4.14.0 before 4.20.10, and from 4.21.0 before 4.22.4.

Source: the CVE record as published by its numbering authority, via NVD and CVE.org.

The underlying weakness: Origin Validation Error

The product does not properly verify that the source of data or communication is valid.

More Origin Validation Error vulnerabilities (CWE-346)

Timeline

  1. CVE record published.
  2. CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: total).
  3. Record last changed materially (score, affected products, status or references).

References

Other vulnerabilities in Bamboo Server

All Bamboo Server vulnerabilities

Recent Origin Validation Error vulnerabilities

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