TIBCO JasperReports Library Directory Traversal
CVE-2018-18809 is a medium-severity improper limitation of a pathname to a restricted directory vulnerability in TIBCO JasperReports Library from TIBCO Software, with a CVSS 3.1 base score of 6.5 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. Affected TIBCO JasperReports Library versions: 6.3.4 and earlier; 6.4.1; 6.4.2, and others listed below. The record does not name a fixed version, so check the vendor advisory. CISA added it to the Known Exploited Vulnerabilities catalogue on December 29, 2022, which means attacks have been observed in the wild.
Attackers are already exploiting this vulnerability, according to CISA.
What to do
- Check which version of TIBCO JasperReports Library you run against the affected versions below, and install the vendor's latest release.
- CISA's required action: Apply updates per vendor instructions.
- Read the advisory on tibco.com for workarounds and exact fixed builds.
Affected products and versions
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
- NoneNothing can be modified.
- Availability
- NoneAvailability is not affected.
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 6.5 | Medium | NVD |
| CVSS 3.0 | 9.9 | Critical | CNA (tibco.com) |
| CVSS 2.0 | 4.0 | Medium | NVD |
Official description
The default server implementation of TIBCO Software Inc.'s TIBCO JasperReports Library, TIBCO JasperReports Library Community Edition, TIBCO JasperReports Library for ActiveMatrix BPM, TIBCO JasperReports Server, TIBCO JasperReports Server Community Edition, TIBCO JasperReports Server for ActiveMatrix BPM, TIBCO Jaspersoft for AWS with Multi-Tenancy, and TIBCO Jaspersoft Reporting and Analytics for AWS contains a directory-traversal vulnerability that may theoretically allow web server users to access contents of the host system. Affected releases are TIBCO Software Inc.'s TIBCO JasperReports Library: versions up to and including 6.3.4; 6.4.1; 6.4.2; 6.4.21; 7.1.0; 7.2.0, TIBCO JasperReports Library Community Edition: versions up to and including 6.7.0, TIBCO JasperReports Library for ActiveMatrix BPM: versions up to and including 6.4.21, TIBCO JasperReports Server: versions up to and including 6.3.4; 6.4.0; 6.4.1; 6.4.2; 6.4.3; 7.1.0, TIBCO JasperReports Server Community Edition: versions up to and including 6.4.3; 7.1.0, TIBCO JasperReports Server for ActiveMatrix BPM: versions up to and including 6.4.3, TIBCO Jaspersoft for AWS with Multi-Tenancy: versions up to and including 7.1.0, TIBCO Jaspersoft Reporting and Analytics for AWS: versions up to and including 7.1.0.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Improper Limitation of a Pathname to a Restricted Directory
The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.
How developers prevent this class of flaw
- 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.
- Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid.
- Use an application firewall that can detect attacks against this weakness. It can be beneficial in cases in which the code cannot be fixed (because it is controlled by a third party), as an emergency prevention measure while more comprehensive software assurance measures are applied, or to provide defense in depth.
More Improper Limitation of a Pathname to a Restricted Directory vulnerabilities (CWE-22)
Timeline
- CVE record published.
- Added to CISA's Known Exploited Vulnerabilities catalogue.
- Deadline for US federal agencies to remediate, set by CISA.
- CISA published its SSVC assessment (exploitation: active, automatable: no, technical impact: total).
- Record last changed materially (score, affected products, status or references).
References
Advisories
Third-party and government advisories
- packetstormsecurity.com/files/154406/Tibco-JasperSoft-Path-Traversal.htmlThird Party Advisory, VDB Entry
- seclists.org/fulldisclosure/2019/Sep/17Mailing List, Third Party Advisory
- cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-18809US Government Resource
Technical write-ups (may include proof of concept)
- cybersecurityworks.com/zerodays/cve-2018-18809-tibco.htmlExploit, Third Party Advisory
- security.elarlang.eu/cve-2018-18809-path-traversal-in-tibco-jaspersoft.htmlExploit, Third Party Advisory
Other vulnerabilities in TIBCO JasperReports Library
- 8.8 High severity
Recent Improper Limitation of a Pathname to a Restricted Directory vulnerabilities
- 7.8 High severity
WinRAR Absolute Path Traversal Exploited
- 9.1 Critical severity
MikroTik Router OS Directory Traversal Exploited
- 7.5 High severity
- 8.8 High severity
- 6.6 Medium severity
- 7.5 High severity
SAP NetWeaver Directory Traversal Exploited
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