Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

1. Architecture and Design

   Protect information stored in cache.

2. Architecture and Design

   Do not store unnecessarily sensitive information in the cache.

3. Architecture and Design

   Consider using encryption in the cache.

OWASP ASVS 4.0.3

• V8.1.1 (opens in a new tab)
• V8.1.2 (opens in a new tab)

Attack patterns

• Lifting Sensitive Data Embedded in Cache (opens in a new tab)

From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

1. Implementation

   Avoid using CRLF as a special sequence.

2. Implementation

   Appropriately filter or quote CRLF sequences in user-controlled input.

OWASP Cheat Sheets

• Abuse Case (opens in a new tab)
• Deserialization (opens in a new tab)
• Injection Prevention (opens in a new tab)
• SQL Injection Prevention (opens in a new tab)
• Injection Prevention in Java (opens in a new tab)

OWASP ASVS 4.0.3

• V1.5.1 (opens in a new tab)

Attack patterns

• Command Delimiters (opens in a new tab)
• Web Server Logs Tampering (opens in a new tab)

From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

1. Implementation

   Use a web server that employs a strict HTTP parsing procedure, such as Apache.

2. Implementation

   Use only SSL communication.

3. Implementation

   Terminate the client session after each request.

OWASP Cheat Sheets

• REST Assessment (opens in a new tab)
• REST Security (opens in a new tab)
• Cross-Site Request Forgery Prevention (opens in a new tab)
• Secure Design Principles (opens in a new tab)

OWASP ASVS 4.0.3

• V13.2.5 (opens in a new tab)

Attack patterns

• HTTP Response Smuggling (opens in a new tab)
• HTTP Request Smuggling (opens in a new tab)

From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

1. Implementation · Input Validation

   Developers should anticipate that delimiters will be injected/removed/manipulated in the input vectors of their product. Use an appropriate combination of denylists and allowlists to ensure only valid, expected and appropriate input is processed by the system.

2. Implementation · Input Validation

   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.

3. Implementation · Output Encoding

   While it is risky to use dynamically-generated query strings, code, or commands that mix control and data together, sometimes it may be unavoidable. Properly quote arguments and escape any special characters within those arguments.

OWASP Cheat Sheets

• Abuse Case (opens in a new tab)
• Deserialization (opens in a new tab)
• Server Side Request Forgery Prevention (opens in a new tab)
• Unvalidated Redirects and Forwards (opens in a new tab)
• Cross Site Scripting Prevention (opens in a new tab)

OWASP ASVS 4.0.3

• V1.5.1 (opens in a new tab)
• V5.2.2 (opens in a new tab)

Attack patterns

• Command Delimiters (opens in a new tab)

From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

1. Architecture and Design

   Design throttling mechanisms into the system architecture. The best protection is to limit the amount of resources that an unauthorized user can cause to be expended. A strong authentication and access control model will help prevent such attacks from occurring in the first place.

2. Architecture and Design

   Mitigation of resource exhaustion attacks requires that the target system either: recognizes the attack and denies that user further access for a given amount of time, or; uniformly throttles all requests in order to make it more difficult to consume resources more quickly than they can again be freed.

3. Architecture and Design

   Ensure that protocols have specific limits of scale placed on them.

OWASP Cheat Sheets

• File Upload (opens in a new tab)

OWASP ASVS 4.0.3

• V12.1.1 (opens in a new tab)

Attack patterns

• XML Ping of the Death (opens in a new tab)
• Regular Expression Exponential Blowup (opens in a new tab)
• Sustained Client Engagement (opens in a new tab)

From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

1. Architecture and Design · Operation

   Very carefully manage the setting, management, and handling of privileges. Explicitly manage trust zones in the software.

2. Architecture and Design · Separation of Privilege

   Compartmentalize the system to have "safe" areas where trust boundaries can be unambiguously drawn. Do not allow sensitive data to go outside of the trust boundary and always be careful when interfacing with a compartment outside of the safe area.

OWASP Cheat Sheets

• Docker Security (opens in a new tab)
• Third Party Javascript Management (opens in a new tab)
• Virtual Patching (opens in a new tab)
• Authorization (opens in a new tab)

OWASP ASVS 4.0.3

• V1.4.4 (opens in a new tab)
• V1.4.5 (opens in a new tab)
• V1.10.1 (opens in a new tab)

Attack patterns

• Embedding Scripts within Scripts (opens in a new tab)
• Modification of Windows Service Configuration (opens in a new tab)
• Malicious Root Certificate (opens in a new tab)
• Intent Spoof (opens in a new tab)
• WebView Exposure (opens in a new tab)

From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

OWASP Cheat Sheets

• OWASP Authentication (opens in a new tab)

OWASP ASVS 4.0.3

• V2.8.5 (opens in a new tab)
• V2.8.4 (opens in a new tab)
• V9.2.3 (opens in a new tab)

Attack patterns

• Reflection Attack in Authentication Protocol (opens in a new tab)

From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

1. Architecture and Design

   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".

2. Architecture and Design · Operation

   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.

3. Architecture and Design

   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…

OWASP Cheat Sheets

• XML Security (opens in a new tab)
• Mass Assignment (opens in a new tab)
• Secure Design Principles (opens in a new tab)

OWASP ASVS 4.0.3

• V12.3.2 (opens in a new tab)
• V13.3.1 (opens in a new tab)
• V5.1.4 (opens in a new tab)

Attack patterns

• Subverting Environment Variable Values (opens in a new tab)
• Leverage Alternate Encoding (opens in a new tab)
• Using Slashes and URL Encoding Combined to Bypass Validation Logic (opens in a new tab)
• URL Encoding (opens in a new tab)
• Manipulating Web Input to File System Calls (opens in a new tab)

From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

1. Architecture and Design

   Ensure that proper authentication is included in the system design.

2. Implementation

   Understand and properly implement all checks necessary to ensure the identity of entities involved in encrypted communications.

OWASP Cheat Sheets

• Transport Layer Protection (opens in a new tab)
• User Privacy Protection (opens in a new tab)
• Password Storage (opens in a new tab)
• Cryptographic Storage (opens in a new tab)
• HSTS (opens in a new tab)

OWASP ASVS 4.0.3

• V1.2.3 (opens in a new tab)
• V1.2.2 (opens in a new tab)
• V1.2.4 (opens in a new tab)

From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

1. Implementation

   The most basic advice for TOCTOU vulnerabilities is to not perform a check before the use. This does not resolve the underlying issue of the execution of a function on a resource whose state and identity cannot be assured, but it does help to limit the false sense of security given by the check.

2. Implementation

   When the file being altered is owned by the current user and group, set the effective gid and uid to that of the current user and group when executing this statement.

3. Architecture and Design

   Limit the interleaving of operations on files from multiple processes.

OWASP Cheat Sheets

• Abuse Case (opens in a new tab)

OWASP ASVS 4.0.3

• V1.11.3 (opens in a new tab)
• V11.1.6 (opens in a new tab)
• V1.11.2 (opens in a new tab)

Attack patterns

• Leveraging Race Conditions via Symbolic Links (opens in a new tab)
• Leveraging Time-of-Check and Time-of-Use (TOCTOU) Race Conditions (opens in a new tab)

From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

1. Architecture and Design

   URL Inputs should be decoded and canonicalized to the application's current internal representation before being validated and processed for authorization. Make sure that your application does not decode the same input twice.

OWASP ASVS 4.0.3

• V8.3.8 (opens in a new tab)
• V13.4.2 (opens in a new tab)
• V7.2.2 (opens in a new tab)

From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

1. Implementation

   If the assertion statement is required (e.g., for security or reliability), change the invoking code to avoid the conditions that trigger the assertion.

2. Implementation

   Consider changing the assertion to some other less "fatal" error. This might not be easy to implement, since other code may be needed to handle the error.

3. Implementation

   Make sensitive open/close operations non-reachable from directly user-controlled data (e.g. open/close resources)

From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).