Quill Binary Signing Resource Vulnerabilities

Quill before v0.7.1 is susceptible to denial of service through unbounded memory allocation when processing maliciously crafted Mach-O binaries. Environments accepting externally-submitted binaries for signing—such as CI/CD pipelines and shared signing services—face resource exhaustion attacks if they process attacker-controlled files. An authenticated local attacker can trigger excessive memory consumption by exploiting unvalidated size fields in code signing structures, causing the application to crash or hang.

Quill before v0.7.1 contains a server-side request forgery vulnerability in its Apple notarization log retrieval functionality that fails to validate URL schemes and destination hosts. Exploitation requires an attacker to intercept or modify API responses, making it primarily a threat in environments with TLS-intercepting proxies, compromised certificate authorities, or other trust boundary violations. An attacker could redirect notarization requests to internal or multicast addresses, potentially exposing sensitive information or accessing restricted resources.

Unbounded memory consumption in Quill's Apple notarization process allows denial of service when HTTP responses lack size validation, affecting environments with TLS-intercepting proxies or compromised certificate authorities where response manipulation is possible. An attacker positioned to intercept or modify notarization API responses can return arbitrarily large payloads to exhaust memory and crash the signing process. This impacts corporate networks and environments with trust boundary violations, though exploitation is not feasible under standard HTTPS conditions with proper certificate validation.