CVE-2020-7648

Overview

Snyk Broker, a package that proxies access between Snyk.io and Git repositories or Jira deployments, contains an arbitrary file read vulnerability (CVE-2020-7648) in all versions prior to 4.72.2 [1][2]. The root cause lies in insufficient validation of URL fragments: by appending a fragment identifier (e.g., #package.json) to a whitelisted path, an authenticated or network-positioned user can read arbitrary files from the broker's filesystem [1][2].

Exploitation

Exploitation requires an attacker who already has access to Snyk's internal network, meaning the attack surface is limited to users of the broker service within that trusted boundary [1][2]. No other authentication is specified beyond network access. The attack simply involves crafting a URL that combines a whitelisted path with the fragment identifier pointing to a target file, such as #package.json [1][2].

Impact

Successful exploitation allows an attacker to read arbitrary files on the system where the Snyk Broker agent is running, potentially exposing sensitive configuration data, credentials, or source code [1][2]. This could lead to further compromise of integrated systems like GitHub Enterprise or Jira.

Mitigation

The vulnerability is fixed in Snyk Broker version 4.72.2 [2]. Users should upgrade to this or a later version. No workarounds are documented. The CVE is not listed on CISA's Known Exploited Vulnerabilities (KEV) catalog as of the publication date.