CVE-2018-10903

Advisory

Oci version 2.0.2 includes a fix for CVE-2018-10903: A flaw was found in python-cryptography versions between >=1.9.0 and <2.3. The finalize_with_tag API did not enforce a minimum tag length. If a user did not validate the input length prior to passing it to finalize_with_tag an attacker could craft an invalid payload with a shortened tag (e.g. 1 byte) such that they would have a 1 in 256 chance of passing the MAC check. GCM tag forgeries can cause key leakage.

Affected package

Affected versions

Fixed versions

Vulnerability changelog

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Added
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* Support for the Limits service
* Support for archiving to Object Storage in the Streaming service
* Support for etags on resources in the Streaming service
* Support for Key Management service (KMS) encryption of file systems in the File Storage service
* Support for moving public IP, DHCP, local peering gateway, internet gateway, network security group, and DRG attachment resources across compartments in the Networking service
* Support for multi-origin, basic cache, certificate mapping, and OCI Monitoring service integration in the Web Application Acceleration and Security service

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Resources

• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-10903
• https://github.com/pyca/cryptography/pull/4342/commits/688e0f673bfbf43fa898994326c6877f00ab19ef
• https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-10903
• https://usn.ubuntu.com/3720-1/
• https://access.redhat.com/errata/RHSA-2018:3600