CVEs
CVE-2024-45238
Certificate containing a malformed subjectPublicKey crashes Fort 1.6.2-, when compiled with OpenSSL < 3.
| Description | A malicious RPKI repository that descends from a (trusted) Trust Anchor can serve (via rsync or RRDP) a resource certificate containing a bit string that doesn’t properly decode into a Subject Public Key. OpenSSL does not report this problem during parsing, and when compiled with OpenSSL libcrypto versions below 3, Fort was recklessly dereferencing the pointer. |
| Impact | Crash. (Potential unavailability of Route Origin Validation.) |
| Patch | Commit 5689dea, released in Fort 1.6.3. |
| Acknowledgments | Thanks to Niklas Vogel and Haya Schulmann for their research and disclosure. |
CVE-2024-45237
Certificate containing a Key Usage bit string longer than 2 bytes causes buffer overflow on Fort 1.6.2-.
| Description | A malicious RPKI repository that descends from a (trusted) Trust Anchor can serve (via rsync or RRDP) a resource certificate containing a Key Usage extension consisting of more than two bytes of data. Fort used to write this string on a 2-byte buffer without properly sanitizing its length, leading to buffer overflow. |
| Impact | Depending on compilation options, the vulnerability would lead to a crash (which might in turn lead to unavailability of Route Origin Validation), incorrect validation results or arbitrary code execution. |
| Patch | Commit 939d988, released in Fort 1.6.3. |
| Acknowledgments | Thanks to Niklas Vogel and Haya Schulmann for their research and disclosure. |
CVE-2024-45235
Certificate containing an Authority Key Identifier missing a keyIdentifier crashes Fort 1.6.2-.
| Description | A malicious RPKI repository that descends from a (trusted) Trust Anchor can serve (via rsync or RRDP) a resource certificate containing an Authority Key Identifier extension missing the keyIdentifier field. Fort was referencing the pointer without sanitizing it first. |
| Impact | Crash. (Potential unavailability of Route Origin Validation.) |
| Patch | Commit b1eb3c5, released in Fort 1.6.3. |
| Acknowledgments | Thanks to Niklas Vogel and Haya Schulmann for their research and disclosure. |
CVE-2024-45236
Signed Object containing empty signedAttrs crashes Fort 1.6.2-.
| Description | A malicious RPKI repository that descends from a (trusted) Trust Anchor can serve (via rsync or RRDP) a signed object containing an empty signedAttributes. Fort was accessing the set’s elements without sanitizing it first. |
| Impact | Crash. (Potential unavailability of Route Origin Validation.) |
| Patch | Commit 4dafbd9, released in Fort 1.6.3. |
| Acknowledgments | Thanks to Niklas Vogel and Haya Schulmann for their research and disclosure. |
CVE-2024-45239
Signed Object containing null eContent crashes Fort 1.6.2-.
| Description | A malicious RPKI repository that descends from a (trusted) Trust Anchor can serve (via rsync or RRDP) a ROA or Manifest containing a null eContent. Fort was dereferencing the pointer without sanitizing it first. |
| Impact | Crash. (Potential unavailability of Route Origin Validation.) |
| Patch | Commit 942f921, released in Fort 1.6.3. |
| Acknowledgments | Thanks to Niklas Vogel and Haya Schulmann for their research and disclosure. |
CVE-2024-45234
Certificate containing signedAttrs not in canonical form crashes Fort 1.6.2-.
| Description | A malicious RPKI repository that descends from a (trusted) Trust Anchor can serve (via rsync or RRDP) a ROA or Manifest containing a signedAttrs encoded in non-canonical form. This bypassed the BER-decoder, reaching a point in the code that panicked when faced with data not encoded in DER. |
| Impact | Crash. (Potential unavailability of Route Origin Validation.) |
| Patch | Commit 521b1a0, released in Fort 1.6.3. |
| Acknowledgments | Thanks to Niklas Vogel and Haya Schulmann for their research and disclosure. |
CVE-2024-48943
Malicious rsync repositories can block Fort by drip-feeding repository objects.
| Description | A malicious RPKI rsync repository can prevent Fort from finishing its validation run by drip-feeding its content. |
| Impact | Delayed validation. (Stale or unavailable Route Origin Validation.) |
| Patch | Commit 4ee88d1, released in Fort 1.6.4. |
| Acknowledgments | Thanks to Koen van Hove for his research and disclosure, and Job Snijders for the proposed fix. |