CVE-2023-49094 is a Server-Side Request Forgery (SSRF) vulnerability identified in the Symbolicator service developed by getsentry. Symbolicator is used to process native stack traces and minidumps, providing symbolication with support for symbol servers. The vulnerability affects versions from 0.3.3 up to but not including 23.11.2. An attacker with a valid account on a vulnerable Sentry instance can exploit this flaw by crafting a malicious HTTP request that causes Symbolicator to send arbitrary GET requests to internal IP addresses within the network. This SSRF allows attackers to potentially access internal resources that are not exposed externally, bypassing network segmentation or firewall protections. The response from these internal requests can be reflected back to the attacker, enabling information disclosure. The vulnerability requires the attacker to have at least some level of authenticated access (PR:L) but does not require user interaction (UI:N). The CVSS v3.1 base score is 4.3, indicating a medium severity, primarily due to the limited scope of impact (confidentiality impact only, no integrity or availability impact) and the requirement for privileges. The issue has been addressed in Symbolicator version 23.11.2, where input validation and request handling have been improved to prevent SSRF exploitation.

For European organizations using Sentry with the Symbolicator service, this vulnerability poses a risk of internal network reconnaissance and potential information leakage. Attackers with valid user accounts could leverage SSRF to probe internal services, potentially discovering sensitive infrastructure components or internal APIs that are not otherwise accessible externally. While the vulnerability does not directly allow code execution or denial of service, the information gained could facilitate further attacks such as lateral movement or privilege escalation. Organizations in sectors with strict data protection regulations (e.g., GDPR) must consider the confidentiality impact seriously, as unauthorized internal data exposure could lead to compliance violations and reputational damage. The medium CVSS score reflects that exploitation requires some level of authenticated access, limiting the attack surface to insiders or compromised accounts. However, given the widespread adoption of Sentry in software development and monitoring environments, the vulnerability could be leveraged in targeted attacks against European enterprises relying on these tools for error tracking and diagnostics.

European organizations should promptly upgrade Symbolicator to version 23.11.2 or later to remediate the SSRF vulnerability. Beyond patching, organizations should enforce strict access controls on Sentry instances, limiting user permissions to the minimum necessary to reduce the risk of exploitation by low-privilege users. Network segmentation should be reviewed to ensure that internal services are not unnecessarily accessible from the Symbolicator host, minimizing the impact of SSRF. Implementing web application firewalls (WAFs) with SSRF detection rules can provide an additional layer of defense. Monitoring and logging of Symbolicator HTTP requests should be enhanced to detect unusual outbound requests indicative of SSRF attempts. Regular audits of user accounts and their privileges on Sentry instances will help prevent abuse by compromised or malicious insiders. Finally, organizations should consider restricting Symbolicator's outbound network access to only trusted endpoints required for normal operation.