Bamboo Data Center: Improper Control of Filename for Include/Require Statement in PHP Program
CVE-2024-21687 is a high-severity improper control of filename for include/require statement in PHP program vulnerability in Bamboo Data Center from Atlassian, with a CVSS 3.1 base score of 8.1 out of 10. It can be exploited remotely over the network by an attacker with a low-privileged account, without any action from a user. The record lists versions 9.6.3, 9.5.4, 9.4.4 as the first without the flaw, so updating Bamboo Data Center to one of those releases or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.75% chance of exploitation within 30 days, higher than 55% of scored CVEs.
High severity with no evidence of exploitation so far.
What to do
- Update Bamboo Data Center to 9.6.3 or 9.5.4 or 9.4.4 or 9.3.6, whichever matches your release line, or a later version.
- Update Bamboo Server to 9.4.4 or 9.3.6 or 9.2.15 or 9.1.3, whichever matches your release line, or a later version.
- Update Bamboo to 9.2.16 or 9.6.4, whichever matches your release line, or a later version.
- Read the advisory on confluence.atlassian.com for workarounds and exact fixed builds.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Atlassian | Bamboo Data Center | 9.6.0 to 9.6.3; 9.5.0 to 9.5.4; 9.4.0 to 9.4.4; 9.3.0 to 9.3.6; 9.2.1 to 9.2.15; 9.1.0 to 9.1.3; 9.6.0 up to, but not including, 9.6.3; 9.5.0 up to, but not including, 9.5.4; and 4 more ranges | 9.6.3, 9.5.4, 9.4.4, 9.3.6, 9.2.15, 9.1.3 |
| Atlassian | Bamboo Server | 9.4.0 to 9.4.4; 9.3.0 to 9.3.6; 9.2.1 to 9.2.15; 9.1.0 to 9.1.3; 9.4.0 up to, but not including, 9.4.4; 9.3.0 up to, but not including, 9.3.6; 9.2.1 up to, but not including, 9.2.15; 9.1.0 up to, but not including, 9.1.3 | 9.4.4, 9.3.6, 9.2.15, 9.1.3 |
| Atlassian | Bamboo | 9.0.0 through 9.0.4; 9.1.0 through 9.1.3; 9.2.0 up to, but not including, 9.2.16; 9.3.0 through 9.3.6; 9.4.0 through 9.4.3; 9.5.0 through 9.5.4; 9.6.0 up to, but not including, 9.6.4 | 9.2.16, 9.6.4 |
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
- LowA basic user account is enough.
- 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
- NoneAvailability is not affected.
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 8.1 | High | NVD |
| CVSS 3.0 | 8.1 | High | CNA (atlassian.com) |
Official description
This High severity File Inclusion vulnerability was introduced in versions 9.0.0, 9.1.0, 9.2.0, 9.3.0, 9.4.0, 9.5.0 and 9.6.0 of Bamboo Data Center and Server. This File Inclusion vulnerability, with a CVSS Score of 8.1, allows an authenticated attacker to get the application to display the contents of a local file, or execute a different files already stored locally on the server which has high impact to confidentiality, high impact to integrity, no impact to availability, and requires no user interaction. Atlassian recommends that Bamboo Data Center and Server customers upgrade to latest version, if you are unable to do so, upgrade your instance to one of the specified supported fixed versions listed on this CVE See the release notes (https://confluence.atlassian.com/bambooreleases/bamboo-release-notes-1189793869.html). You can download the latest version of Bamboo Data Center and Server from the download center (https://www.atlassian.com/software/bamboo/download-archives). This vulnerability was reported via our Bug Bounty program.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Improper Control of Filename for Include/Require Statement in PHP Program
The PHP application receives input from an upstream component, but it does not restrict or incorrectly restricts the input before its usage in require, include, or similar functions.
How developers prevent this class of flaw
- Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid.
- When the set of acceptable objects, such as filenames or URLs, is limited or known, create a mapping from a set of fixed input values (such as numeric IDs) to the actual filenames or URLs, and reject all other inputs. For example, ID 1 could map to inbox.txt and ID 2 could map to profile.txt. Features such as the ESAPI AccessReferenceMap provide this capability.
- For any security checks that are performed on the client side, ensure that these checks are duplicated on the server side, in order to avoid CWE-602. Attackers can bypass the client-side checks by modifying values after the checks have been performed, or by changing the client to remove the client-side checks entirely. Then, these modified values would be submitted to the server.
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: total).
- Record last changed materially (score, affected products, status or references).
References
Advisories
Other vulnerabilities in Bamboo Data Center
- 7.5 High severity
- 8.1 High severity
- 8.8 High severity
- 8.8 High severity
- 8.0 High severity
- 8.8 High severity
Recent Improper Control of Filename for Include/Require Statement in PHP Program vulnerabilities
- 7.5 High severity
- 8.8 High severity
- 7.2 High severity
- 8.8 High severity
- 8.8 High severity
- 8.8 High severity
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