SSRF in symbolicator via invalid protocol

CVE-2023-51451

What is CVE-2023-51451?

Symbolicator is a service used in Sentry. Starting in Symbolicator version 0.3.3 and prior to version 21.12.1, an attacker could make Symbolicator send GET HTTP requests to arbitrary URLs with internal IP addresses by using an invalid protocol. The responses of those requests could be exposed via Symbolicator's API. In affected Sentry instances, the data could be exposed through the Sentry API and user interface if the attacker has a registered account. The issue has been fixed in Symbolicator release 23.12.1, Sentry self-hosted release 23.12.1, and has already been mitigated on sentry.io on December 18, 2023. If updating is not possible, some other mitigations are available. One may disable JS processing by toggling the option Allow JavaScript Source Fetching in Organization Settings > Security & Privacy and/or disable all untrusted public repositories under Project Settings > Debug Files. Alternatively, if JavaScript and native symbolication are not required, disable Symbolicator completely in config.yml.

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References