CWE-73
External Control of File Name or Path
The product allows user input to control or influence paths or file names that are used in filesystem operations.
CVE-2026-34783 (GCVE-0-2026-34783)
Vulnerability from cvelistv5 – Published: 2026-04-06 16:04 – Updated: 2026-04-07 14:12
VLAI
Title
Ferret has a Path Traversal in IO::FS::WRITE allows arbitrary file write when scraping malicious websites
Summary
Ferret is a declarative system for working with web data. Prior to 2.0.0-alpha.4, a path traversal vulnerability in Ferret's IO::FS::WRITE standard library function allows a malicious website to write arbitrary files to the filesystem of the machine running Ferret. When an operator scrapes a website that returns filenames containing ../ sequences, and uses those filenames to construct output paths (a standard scraping pattern), the attacker controls both the destination path and the file content. This can lead to remote code execution via cron jobs, SSH authorized_keys, shell profiles, or web shells. This vulnerability is fixed in 2.0.0-alpha.4.
Severity
8.1 (High)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/MontFerret/ferret/security/adv… | x_refsource_CONFIRM |
| https://github.com/MontFerret/ferret/commit/160eb… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| MontFerret | ferret |
Affected:
< 2.0.0-alpha.4
|
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CVE-2026-35032 (GCVE-0-2026-35032)
Vulnerability from cvelistv5 – Published: 2026-04-14 22:25 – Updated: 2026-04-15 20:02
VLAI
Title
Jellyfin: Potential SSRF + Arbitrary file read via LiveTV M3U tuner
Summary
Jellyfin is an open source self hosted media server. Versions prior to 10.11.7 contain a vulnerability chain in the LiveTV M3U tuner endpoint (POST /LiveTv/TunerHosts), where the tuner URL is not validated, allowing local file read via non-HTTP paths and Server-Side Request Forgery (SSRF) via HTTP URLs. This is exploitable by any authenticated user because the EnableLiveTvManagement permission defaults to true for all new users. An attacker can chain these vulnerabilities by adding an M3U tuner pointing to an attacker-controlled server, serving a crafted M3U with a channel pointing to the Jellyfin database, exfiltrating the database to extract admin session tokens, and escalating to admin privileges. This issue has been fixed in version 10.11.7. If users are unable to upgrade immediately, they can disable Live TV Management privileges for all users.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/jellyfin/jellyfin/security/adv… | x_refsource_CONFIRM |
| https://github.com/jellyfin/jellyfin/releases/tag… | x_refsource_MISC |
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CVE-2026-35076 (GCVE-0-2026-35076)
Vulnerability from cvelistv5 – Published: 2026-06-03 10:38 – Updated: 2026-06-09 10:37
VLAI
Title
Arbitrary file delete vulnerability in method bac-scanresult
Summary
The bac-scanresult method allows a remote attacker with user privileges to delete arbitrary local files due to insufficient validation of user-controlled input.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-73 - External Control of File Name or Path
Assigner
References
1 reference
Impacted products
18 products
| Vendor | Product | Version | |
|---|---|---|---|
| MBS | Single-A |
Affected:
V1_0_0_0 , < V6_0_0_7
(custom)
|
|
| MBS | Double-A Profibus |
Affected:
V1_0_0_0 , < V6_0_0_7
(custom)
|
|
| MBS | Double-A x-link |
Affected:
V1_0_0_0 , < V6_0_0_7
(custom)
|
|
| MBS | Single-X |
Affected:
V1_0_0_0 , < V6_0_0_7
(custom)
|
|
| MBS | Double-X CAN |
Affected:
V1_0_0_0 , < V6_0_0_7
(custom)
|
|
| MBS | Double-X DALI |
Affected:
V1_0_0_0 , < V6_0_0_7
(custom)
|
|
| MBS | Double-X KNX |
Affected:
V1_0_0_0 , < V6_0_0_7
(custom)
|
|
| MBS | Double-X LON |
Affected:
V1_0_0_0 , < V6_0_0_7
(custom)
|
|
| MBS | Double-X M-Bus |
Affected:
V1_0_0_0 , < V6_0_0_7
(custom)
|
|
| MBS | Double-X PROFINET |
Affected:
V1_0_0_0 , < V6_0_0_7
(custom)
|
|
| MBS | Double-X x-link |
Affected:
V1_0_0_0 , < V6_0_0_7
(custom)
|
|
| MBS | Triple-X KNX+DALI |
Affected:
V1_0_0_0 , < V6_0_0_7
(custom)
|
|
| MBS | Triple-X KNX+LON |
Affected:
V1_0_0_0 , < V6_0_0_7
(custom)
|
|
| MBS | Triple-X KNX+M-Bus |
Affected:
V1_0_0_0 , < V6_0_0_7
(custom)
|
|
| MBS | Triple-X PROFINET+DALI |
Affected:
V1_0_0_0 , < V6_0_0_7
(custom)
|
|
| MBS | Triple-X PROFINET+KNX |
Affected:
V1_0_0_0 , < V6_0_0_7
(custom)
|
|
| MBS | Triple-X PROFINET+LON |
Affected:
V1_0_0_0 , < V6_0_0_7
(custom)
|
|
| MBS | Triple-X PROFINET+M-Bus |
Affected:
V1_0_0_0 , < V6_0_0_7
(custom)
|
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CVE-2026-35077 (GCVE-0-2026-35077)
Vulnerability from cvelistv5 – Published: 2026-06-03 10:39 – Updated: 2026-06-09 10:37
VLAI
Title
Arbitrary file delete vulnerability in method ugw-delete-file
Summary
The ugw-delete-file method allows a remote attacker with user privileges to delete arbitrary local files due to insufficient validation of user-controlled input.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-73 - External Control of File Name or Path
Assigner
References
1 reference
Impacted products
18 products
| Vendor | Product | Version | |
|---|---|---|---|
| MBS | Single-A |
Affected:
V1_0_0_0 , < V6_0_0_7
(custom)
|
|
| MBS | Double-A Profibus |
Affected:
V1_0_0_0 , < V6_0_0_7
(custom)
|
|
| MBS | Double-A x-link |
Affected:
V1_0_0_0 , < V6_0_0_7
(custom)
|
|
| MBS | Single-X |
Affected:
V1_0_0_0 , < V6_0_0_7
(custom)
|
|
| MBS | Double-X CAN |
Affected:
V1_0_0_0 , < V6_0_0_7
(custom)
|
|
| MBS | Double-X DALI |
Affected:
V1_0_0_0 , < V6_0_0_7
(custom)
|
|
| MBS | Double-X KNX |
Affected:
V1_0_0_0 , < V6_0_0_7
(custom)
|
|
| MBS | Double-X LON |
Affected:
V1_0_0_0 , < V6_0_0_7
(custom)
|
|
| MBS | Double-X M-Bus |
Affected:
V1_0_0_0 , < V6_0_0_7
(custom)
|
|
| MBS | Double-X PROFINET |
Affected:
V1_0_0_0 , < V6_0_0_7
(custom)
|
|
| MBS | Double-X x-link |
Affected:
V1_0_0_0 , < V6_0_0_7
(custom)
|
|
| MBS | Triple-X KNX+DALI |
Affected:
V1_0_0_0 , < V6_0_0_7
(custom)
|
|
| MBS | Triple-X KNX+LON |
Affected:
V1_0_0_0 , < V6_0_0_7
(custom)
|
|
| MBS | Triple-X KNX+M-Bus |
Affected:
V1_0_0_0 , < V6_0_0_7
(custom)
|
|
| MBS | Triple-X PROFINET+DALI |
Affected:
V1_0_0_0 , < V6_0_0_7
(custom)
|
|
| MBS | Triple-X PROFINET+KNX |
Affected:
V1_0_0_0 , < V6_0_0_7
(custom)
|
|
| MBS | Triple-X PROFINET+LON |
Affected:
V1_0_0_0 , < V6_0_0_7
(custom)
|
|
| MBS | Triple-X PROFINET+M-Bus |
Affected:
V1_0_0_0 , < V6_0_0_7
(custom)
|
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CVE-2026-35078 (GCVE-0-2026-35078)
Vulnerability from cvelistv5 – Published: 2026-06-03 10:39 – Updated: 2026-06-09 10:37
VLAI
Title
Arbitrary file delete vulnerability in method ugw-logstop
Summary
The ugw-logstop method allows a remote attacker with user privileges to delete arbitrary local files due to insufficient validation of user-controlled input.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-73 - External Control of File Name or Path
Assigner
References
1 reference
Impacted products
18 products
| Vendor | Product | Version | |
|---|---|---|---|
| MBS | Single-A |
Affected:
V1_0_0_0 , < V6_0_0_7
(custom)
|
|
| MBS | Double-A Profibus |
Affected:
V1_0_0_0 , < V6_0_0_7
(custom)
|
|
| MBS | Double-A x-link |
Affected:
V1_0_0_0 , < V6_0_0_7
(custom)
|
|
| MBS | Single-X |
Affected:
V1_0_0_0 , < V6_0_0_7
(custom)
|
|
| MBS | Double-X CAN |
Affected:
V1_0_0_0 , < V6_0_0_7
(custom)
|
|
| MBS | Double-X DALI |
Affected:
V1_0_0_0 , < V6_0_0_7
(custom)
|
|
| MBS | Double-X KNX |
Affected:
V1_0_0_0 , < V6_0_0_7
(custom)
|
|
| MBS | Double-X LON |
Affected:
V1_0_0_0 , < V6_0_0_7
(custom)
|
|
| MBS | Double-X M-Bus |
Affected:
V1_0_0_0 , < V6_0_0_7
(custom)
|
|
| MBS | Double-X PROFINET |
Affected:
V1_0_0_0 , < V6_0_0_7
(custom)
|
|
| MBS | Double-X x-link |
Affected:
V1_0_0_0 , < V6_0_0_7
(custom)
|
|
| MBS | Triple-X KNX+DALI |
Affected:
V1_0_0_0 , < V6_0_0_7
(custom)
|
|
| MBS | Triple-X KNX+LON |
Affected:
V1_0_0_0 , < V6_0_0_7
(custom)
|
|
| MBS | Triple-X KNX+M-Bus |
Affected:
V1_0_0_0 , < V6_0_0_7
(custom)
|
|
| MBS | Triple-X PROFINET+DALI |
Affected:
V1_0_0_0 , < V6_0_0_7
(custom)
|
|
| MBS | Triple-X PROFINET+KNX |
Affected:
V1_0_0_0 , < V6_0_0_7
(custom)
|
|
| MBS | Triple-X PROFINET+LON |
Affected:
V1_0_0_0 , < V6_0_0_7
(custom)
|
|
| MBS | Triple-X PROFINET+M-Bus |
Affected:
V1_0_0_0 , < V6_0_0_7
(custom)
|
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CVE-2026-35079 (GCVE-0-2026-35079)
Vulnerability from cvelistv5 – Published: 2026-06-03 10:39 – Updated: 2026-06-09 10:36
VLAI
Title
Arbitrary file delete vulnerability in method ugw-restore
Summary
The ugw-restore method allows a remote attacker with user privileges to delete arbitrary local files due to insufficient validation of user-controlled input.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-73 - External Control of File Name or Path
Assigner
References
1 reference
Impacted products
18 products
| Vendor | Product | Version | |
|---|---|---|---|
| MBS | Single-A |
Affected:
V1_0_0_0 , < V6_0_0_7
(custom)
|
|
| MBS | Double-A Profibus |
Affected:
V1_0_0_0 , < V6_0_0_7
(custom)
|
|
| MBS | Double-A x-link |
Affected:
V1_0_0_0 , < V6_0_0_7
(custom)
|
|
| MBS | Single-X |
Affected:
V1_0_0_0 , < V6_0_0_7
(custom)
|
|
| MBS | Double-X CAN |
Affected:
V1_0_0_0 , < V6_0_0_7
(custom)
|
|
| MBS | Double-X DALI |
Affected:
V1_0_0_0 , < V6_0_0_7
(custom)
|
|
| MBS | Double-X KNX |
Affected:
V1_0_0_0 , < V6_0_0_7
(custom)
|
|
| MBS | Double-X LON |
Affected:
V1_0_0_0 , < V6_0_0_7
(custom)
|
|
| MBS | Double-X M-Bus |
Affected:
V1_0_0_0 , < V6_0_0_7
(custom)
|
|
| MBS | Double-X PROFINET |
Affected:
V1_0_0_0 , < V6_0_0_7
(custom)
|
|
| MBS | Double-X x-link |
Affected:
V1_0_0_0 , < V6_0_0_7
(custom)
|
|
| MBS | Triple-X KNX+DALI |
Affected:
V1_0_0_0 , < V6_0_0_7
(custom)
|
|
| MBS | Triple-X KNX+LON |
Affected:
V1_0_0_0 , < V6_0_0_7
(custom)
|
|
| MBS | Triple-X KNX+M-Bus |
Affected:
V1_0_0_0 , < V6_0_0_7
(custom)
|
|
| MBS | Triple-X PROFINET+DALI |
Affected:
V1_0_0_0 , < V6_0_0_7
(custom)
|
|
| MBS | Triple-X PROFINET+KNX |
Affected:
V1_0_0_0 , < V6_0_0_7
(custom)
|
|
| MBS | Triple-X PROFINET+LON |
Affected:
V1_0_0_0 , < V6_0_0_7
(custom)
|
|
| MBS | Triple-X PROFINET+M-Bus |
Affected:
V1_0_0_0 , < V6_0_0_7
(custom)
|
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CVE-2026-35080 (GCVE-0-2026-35080)
Vulnerability from cvelistv5 – Published: 2026-06-03 10:40 – Updated: 2026-06-09 10:35
VLAI
Title
Arbitrary file delete vulnerability in method ugw-restoreinfo
Summary
The ugw-restoreinfo method allows a remote attacker with user privileges to delete arbitrary local files due to insufficient validation of user-controlled input.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-73 - External Control of File Name or Path
Assigner
References
1 reference
Impacted products
18 products
| Vendor | Product | Version | |
|---|---|---|---|
| MBS | Single-A |
Affected:
V1_0_0_0 , < V6_0_0_7
(custom)
|
|
| MBS | Double-A Profibus |
Affected:
V1_0_0_0 , < V6_0_0_7
(custom)
|
|
| MBS | Double-A x-link |
Affected:
V1_0_0_0 , < V6_0_0_7
(custom)
|
|
| MBS | Single-X |
Affected:
V1_0_0_0 , < V6_0_0_7
(custom)
|
|
| MBS | Double-X CAN |
Affected:
V1_0_0_0 , < V6_0_0_7
(custom)
|
|
| MBS | Double-X DALI |
Affected:
V1_0_0_0 , < V6_0_0_7
(custom)
|
|
| MBS | Double-X KNX |
Affected:
V1_0_0_0 , < V6_0_0_7
(custom)
|
|
| MBS | Double-X LON |
Affected:
V1_0_0_0 , < V6_0_0_7
(custom)
|
|
| MBS | Double-X M-Bus |
Affected:
V1_0_0_0 , < V6_0_0_7
(custom)
|
|
| MBS | Double-X PROFINET |
Affected:
V1_0_0_0 , < V6_0_0_7
(custom)
|
|
| MBS | Double-X x-link |
Affected:
V1_0_0_0 , < V6_0_0_7
(custom)
|
|
| MBS | Triple-X KNX+DALI |
Affected:
V1_0_0_0 , < V6_0_0_7
(custom)
|
|
| MBS | Triple-X KNX+LON |
Affected:
V1_0_0_0 , < V6_0_0_7
(custom)
|
|
| MBS | Triple-X KNX+M-Bus |
Affected:
V1_0_0_0 , < V6_0_0_7
(custom)
|
|
| MBS | Triple-X PROFINET+DALI |
Affected:
V1_0_0_0 , < V6_0_0_7
(custom)
|
|
| MBS | Triple-X PROFINET+KNX |
Affected:
V1_0_0_0 , < V6_0_0_7
(custom)
|
|
| MBS | Triple-X PROFINET+LON |
Affected:
V1_0_0_0 , < V6_0_0_7
(custom)
|
|
| MBS | Triple-X PROFINET+M-Bus |
Affected:
V1_0_0_0 , < V6_0_0_7
(custom)
|
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CVE-2026-35174 (GCVE-0-2026-35174)
Vulnerability from cvelistv5 – Published: 2026-04-06 17:50 – Updated: 2026-04-07 14:38
VLAI
Title
Chyrp Lite has a Path Traversal to Remote Code Execution
Summary
Chyrp Lite is an ultra-lightweight blogging engine. Prior to 2026.01, a path traversal vulnerability exists in the administration console that allows an administrator or a user with Change Settings permission to change the uploads path to any folder. This vulnerability allows the user to download any file on the server, including config.json.php with database credentials and overwrite critical system files, leading to remote code execution. This vulnerability is fixed in 2026.01.
Severity
9.1 (Critical)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/xenocrat/chyrp-lite/security/a… | x_refsource_CONFIRM |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| xenocrat | chyrp-lite |
Affected:
< 2026.01
|
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CVE-2026-35465 (GCVE-0-2026-35465)
Vulnerability from cvelistv5 – Published: 2026-04-18 00:41 – Updated: 2026-04-20 15:47
VLAI
Title
SecureDrop Client has path injection in read_gzip_header_filename()
Summary
SecureDrop Client is a desktop app for journalists to securely communicate with sources and handle submissions on the SecureDrop Workstation. In versions 0.17.4 and below, a compromised SecureDrop Server can achieve code execution on the Client's virtual machine (sd-app) by exploiting improper filename validation in gzip archive extraction, which permits absolute paths and enables overwriting critical files like the SQLite database. Exploitation requires prior compromise of the dedicated SecureDrop Server, which itself is hardened and only accessible via Tor hidden services. Despite the high attack complexity, the vulnerability is rated High severity due to its significant impact on confidentiality, integrity, and availability of decrypted source submissions. This issue is similar to CVE-2025-24888 but occurs through a different code path, and a more robust fix has been implemented in the replacement SecureDrop Inbox codebase. The issue has been fixed in version 0.17.5.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/freedomofpress/securedrop-clie… | x_refsource_CONFIRM |
| https://github.com/freedomofpress/securedrop-clie… | x_refsource_MISC |
| https://github.com/freedomofpress/securedrop-clie… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| freedomofpress | securedrop-client |
Affected:
< 0.17.5
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CVE-2026-35593 (GCVE-0-2026-35593)
Vulnerability from cvelistv5 – Published: 2026-05-19 23:32 – Updated: 2026-05-20 13:20
VLAI
Title
Trilium Notes has Local File Inclusion via upload modified file API endpoint
Summary
Trilium Notes is an open-source, cross-platform hierarchical note taking application for building large personal knowledge bases. Versions 0.102.1 and prior are vulnerable to Local File Inclusion, allowing an authenticated attacker to read sensitive arbitrary files from the server's filesystem. The uploadModifiedFileToAttachment function, which is called when a POST request is received to /api/attachments/{attachmentId}/upload-modified-file, replaces the content of the attachment with the content from another file (whose path is provided in filePath of Request body). After which the content of the attachment can be viewed at /api/attachments/{attachmentId}/download. This exposes sensitive system files such as SSH keys, credentials, configs, and OS files, potentially leading to remote code execution and compromise of co-hosted applications. This issue has been fixed in version 0.102.2.
Severity
6.8 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/TriliumNext/Trilium/security/a… | x_refsource_CONFIRM |
| https://github.com/TriliumNext/Trilium/releases/t… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| TriliumNext | Trilium |
Affected:
< 0.102.2
|
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Mitigation
Phase: Architecture and Design
Description:
- When the set of filenames is limited or known, create a mapping from a set of fixed input values (such as numeric IDs) to the actual filenames, 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.
Mitigation
Phases: Architecture and Design, Operation
Description:
- Run your code in a "jail" or similar sandbox environment that enforces strict boundaries between the process and the operating system. This may effectively restrict all access to files within a particular directory.
- Examples include the Unix chroot jail and AppArmor. In general, managed code may provide some protection.
- This may not be a feasible solution, and it only limits the impact to the operating system; the rest of your application may still be subject to compromise.
- Be careful to avoid CWE-243 and other weaknesses related to jails.
Mitigation
Phase: Architecture and Design
Description:
- 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.
Mitigation ID: MIT-5.1
Phase: Implementation
Strategy: Input Validation
Description:
- Assume all input is malicious. Use an "accept known good" input validation strategy, i.e., use a list of acceptable inputs that strictly conform to specifications. Reject any input that does not strictly conform to specifications, or transform it into something that does.
- When performing input validation, consider all potentially relevant properties, including length, type of input, the full range of acceptable values, missing or extra inputs, syntax, consistency across related fields, and conformance to business rules. As an example of business rule logic, "boat" may be syntactically valid because it only contains alphanumeric characters, but it is not valid if the input is only expected to contain colors such as "red" or "blue."
- Do not rely exclusively on looking for malicious or malformed inputs. This is likely to miss at least one undesirable input, especially if the code's environment changes. This can give attackers enough room to bypass the intended validation. However, denylists can be useful for detecting potential attacks or determining which inputs are so malformed that they should be rejected outright.
- When validating filenames, use stringent allowlists that limit the character set to be used. If feasible, only allow a single "." character in the filename to avoid weaknesses such as CWE-23, and exclude directory separators such as "/" to avoid CWE-36. Use a list of allowable file extensions, which will help to avoid CWE-434.
- Do not rely exclusively on a filtering mechanism that removes potentially dangerous characters. This is equivalent to a denylist, which may be incomplete (CWE-184). For example, filtering "/" is insufficient protection if the filesystem also supports the use of "\" as a directory separator. Another possible error could occur when the filtering is applied in a way that still produces dangerous data (CWE-182). For example, if "../" sequences are removed from the ".../...//" string in a sequential fashion, two instances of "../" would be removed from the original string, but the remaining characters would still form the "../" string.
Mitigation
Phase: Implementation
Description:
- Use a built-in path canonicalization function (such as realpath() in C) that produces the canonical version of the pathname, which effectively removes ".." sequences and symbolic links (CWE-23, CWE-59).
Mitigation
Phases: Installation, Operation
Description:
- Use OS-level permissions and run as a low-privileged user to limit the scope of any successful attack.
Mitigation
Phases: Operation, Implementation
Description:
- If you are using PHP, configure your application so that it does not use register_globals. During implementation, develop your application so that it does not rely on this feature, but be wary of implementing a register_globals emulation that is subject to weaknesses such as CWE-95, CWE-621, and similar issues.
Mitigation
Phase: Testing
Description:
- Use tools and techniques that require manual (human) analysis, such as penetration testing, threat modeling, and interactive tools that allow the tester to record and modify an active session. These may be more effective than strictly automated techniques. This is especially the case with weaknesses that are related to design and business rules.
CAPEC-13: Subverting Environment Variable Values
The adversary directly or indirectly modifies environment variables used by or controlling the target software. The adversary's goal is to cause the target software to deviate from its expected operation in a manner that benefits the adversary.
CAPEC-267: Leverage Alternate Encoding
An adversary leverages the possibility to encode potentially harmful input or content used by applications such that the applications are ineffective at validating this encoding standard.
CAPEC-64: Using Slashes and URL Encoding Combined to Bypass Validation Logic
This attack targets the encoding of the URL combined with the encoding of the slash characters. An attacker can take advantage of the multiple ways of encoding a URL and abuse the interpretation of the URL. A URL may contain special character that need special syntax handling in order to be interpreted. Special characters are represented using a percentage character followed by two digits representing the octet code of the original character (%HEX-CODE). For instance US-ASCII space character would be represented with %20. This is often referred as escaped ending or percent-encoding. Since the server decodes the URL from the requests, it may restrict the access to some URL paths by validating and filtering out the URL requests it received. An attacker will try to craft an URL with a sequence of special characters which once interpreted by the server will be equivalent to a forbidden URL. It can be difficult to protect against this attack since the URL can contain other format of encoding such as UTF-8 encoding, Unicode-encoding, etc.
CAPEC-72: URL Encoding
This attack targets the encoding of the URL. An adversary can take advantage of the multiple way of encoding an URL and abuse the interpretation of the URL.
CAPEC-76: Manipulating Web Input to File System Calls
An attacker manipulates inputs to the target software which the target software passes to file system calls in the OS. The goal is to gain access to, and perhaps modify, areas of the file system that the target software did not intend to be accessible.
CAPEC-78: Using Escaped Slashes in Alternate Encoding
This attack targets the use of the backslash in alternate encoding. An adversary can provide a backslash as a leading character and causes a parser to believe that the next character is special. This is called an escape. By using that trick, the adversary tries to exploit alternate ways to encode the same character which leads to filter problems and opens avenues to attack.
CAPEC-79: Using Slashes in Alternate Encoding
This attack targets the encoding of the Slash characters. An adversary would try to exploit common filtering problems related to the use of the slashes characters to gain access to resources on the target host. Directory-driven systems, such as file systems and databases, typically use the slash character to indicate traversal between directories or other container components. For murky historical reasons, PCs (and, as a result, Microsoft OSs) choose to use a backslash, whereas the UNIX world typically makes use of the forward slash. The schizophrenic result is that many MS-based systems are required to understand both forms of the slash. This gives the adversary many opportunities to discover and abuse a number of common filtering problems. The goal of this pattern is to discover server software that only applies filters to one version, but not the other.
CAPEC-80: Using UTF-8 Encoding to Bypass Validation Logic
This attack is a specific variation on leveraging alternate encodings to bypass validation logic. This attack leverages the possibility to encode potentially harmful input in UTF-8 and submit it to applications not expecting or effective at validating this encoding standard making input filtering difficult. UTF-8 (8-bit UCS/Unicode Transformation Format) is a variable-length character encoding for Unicode. Legal UTF-8 characters are one to four bytes long. However, early version of the UTF-8 specification got some entries wrong (in some cases it permitted overlong characters). UTF-8 encoders are supposed to use the "shortest possible" encoding, but naive decoders may accept encodings that are longer than necessary. According to the RFC 3629, a particularly subtle form of this attack can be carried out against a parser which performs security-critical validity checks against the UTF-8 encoded form of its input, but interprets certain illegal octet sequences as characters.