Bamboo Server: Improper Authentication
CVE-2022-26136 is a critical-severity improper authentication vulnerability in Bamboo Server from Atlassian, with a CVSS 3.1 base score of 9.8 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. 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 5.66% chance of exploitation within 30 days, which is in the top 6.9% of all scored CVEs.
Critical severity: a successful attack would have severe impact.
What to do
- Update Bamboo Server to 8.0.9 or 8.1.8 or 8.2.4, whichever matches your release line, or a later version.
- 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.
- 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.
- Read the advisory on jira.atlassian.com for workarounds and exact fixed builds.
- Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Atlassian | Bamboo Server | before 8.0.9; 8.1.0; before 8.1.8; 8.2.0; before 8.2.4 | 8.0.9, 8.1.8, 8.2.4 |
| Atlassian | Bamboo Data Center | before 8.0.9; 8.1.0; before 8.1.8; 8.2.0; before 8.2.4 | 8.0.9, 8.1.8, 8.2.4 |
| Atlassian | Bitbucket Server | before 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 ranges | 7.6.16, 7.17.8, 7.19.5, 7.20.2, 7.21.2 |
| Atlassian | Bitbucket Data Center | before 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 ranges | 7.6.16, 7.17.8, 7.19.5, 7.20.2, 7.21.2 |
| Atlassian | Confluence Server | before 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 ranges | 7.4.17, 7.13.7, 7.14.3, 7.15.2, 7.16.4, 7.17.4 |
| Atlassian | Confluence Data Center | before 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 ranges | 7.4.17, 7.13.7, 7.14.3, 7.15.2, 7.16.4, 7.17.4 |
| Atlassian | Crowd Server | before 4.3.8; 4.4.0; before 4.4.2; 5.0.0 | 4.3.8, 4.4.2 |
| Atlassian | Crowd Data Center | before 4.3.8; 4.4.0; before 4.4.2; 5.0.0 | 4.3.8, 4.4.2 |
| Atlassian | Crucible | before 4.8.10 | 4.8.10 |
| Atlassian | Fisheye | before 4.8.10 | 4.8.10 |
| Atlassian | Jira Core Server | before 8.13.22; 8.14.0; before 8.20.10; 8.21.0; before 8.22.4 | 8.13.22, 8.20.10, 8.22.4 |
| Atlassian | Jira Software Server | before 8.13.22; 8.14.0; before 8.20.10; 8.21.0; before 8.22.4 | 8.13.22, 8.20.10, 8.22.4 |
| Atlassian | Jira Software Data Center | before 8.13.22; 8.14.0; before 8.20.10; 8.21.0; before 8.22.4 | 8.13.22, 8.20.10, 8.22.4 |
| Atlassian | Jira Service Management Server | before 4.13.22; 4.14.0; before 4.20.10; 4.21.0; before 4.22.4 | 4.13.22, 4.20.10, 4.22.4 |
| Atlassian | Jira Service Management Data Center | before 4.13.22; 4.14.0; before 4.20.10; 4.21.0; before 4.22.4 | 4.13.22, 4.20.10, 4.22.4 |
| Atlassian | bamboo | 7.2.0 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, 8.2.4 | 7.2.10, 8.0.9, 8.1.8, 8.2.4 |
| Atlassian | bitbucket | before 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; 7.20.0 up to, but not including, 7.20.2; 7.21.0 up to, but not including, 7.21.2; 8.0.0; 8.1.0 | 7.6.16, 7.17.8, 7.19.5, 7.20.2, 7.21.2 |
| Atlassian | crowd | before 4.3.8; 4.4.0 up to, but not including, 4.4.2; 5.0.0 | 4.3.8, 4.4.2 |
| Atlassian | jira_data_center | 8.13.0 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, 8.22.4 | 8.13.22, 8.20.10, 8.22.4 |
| Atlassian | jira_server | 8.13.0 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, 8.22.4 | 8.13.22, 8.20.10, 8.22.4 |
| Atlassian | jira_service_desk | before 4.13.22 | 4.13.22 |
| Atlassian | jira_service_management | 4.14.0 up to, but not including, 4.20.10; 4.21.0 up to, but not including, 4.22.4 | 4.20.10, 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
- NoneNo action by a victim is required.
- 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:N/S:U/C:H/I:H/A:H. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 9.8 | Critical | NVD |
| CVSS 3.1 | 9.8 | Critical | CISA (ADP) |
Official description
A vulnerability in multiple Atlassian products allows a remote, unauthenticated attacker to bypass Servlet Filters used by first and third party apps. The impact depends on which filters are used by each app, and how the filters are used. This vulnerability can result in authentication bypass and cross-site scripting. Atlassian has released updates that fix the root cause of this vulnerability, but has not exhaustively enumerated all potential consequences of this vulnerability. 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: Improper Authentication
When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.
How developers prevent this class of flaw
- Use an authentication framework or library such as the OWASP ESAPI Authentication feature.
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: yes, technical impact: total).
- Record last changed materially (score, affected products, status or references).
References
Advisories
- jira.atlassian.com/browse/BAM-21795Issue Tracking
- jira.atlassian.com/browse/BSERV-13370Issue Tracking
- jira.atlassian.com/browse/CONFSERVER-79476Issue Tracking
- jira.atlassian.com/browse/CRUC-8541Issue Tracking
- jira.atlassian.com/browse/CWD-5815Issue Tracking
- jira.atlassian.com/browse/FE-7410Issue Tracking
- jira.atlassian.com/browse/JRASERVER-73897Issue Tracking
- jira.atlassian.com/browse/JSDSERVER-11863Issue Tracking
Other vulnerabilities in Bamboo Server
- 8.0 High severity
- 8.1 High severity
- 8.8 High severity
- 8.8 High severity
Recent Improper Authentication vulnerabilities
- 9.8 Critical severity
- 8.8 High severity
- 7.8 High severity
- 7.5 High severity
- 9.8 Critical severity
- 9.8 Critical severity
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