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CVE-2017-8794: Accellion File Transfer Appliance: Server-side request forgery
CVE-2017-8794 is rated critical with a CVSS v3.0 base score of 10.0 and NVD lists Accellion File Transfer Appliance as the affected product. Per its scoring, it can be exploited over the network, without authentication, without any user interaction.
Vulnerability description
An issue was discovered on Accellion FTA devices before FTA_9_12_180. Because a regular expression (intended to match local https URLs) lacks an initial ^ character, courier/web/1000@/wmProgressval.html allows SSRF attacks with a file:///etc/passwd#https:// URL pattern.
Severity breakdown
CVSS v3.0 10.0: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N
- Attack vector: Network. Exploitable remotely over the network, with no need for local or physical access.
- Attack complexity: Low. No special conditions; the attack can be repeated reliably.
- Privileges required: None. No account or prior access is needed.
- User interaction: None. No action from any user is needed.
- Scope: Changed. Impact reaches beyond the vulnerable component to other resources.
- Confidentiality impact: High. Total loss of confidentiality; sensitive data can be fully disclosed.
- Integrity impact: High. Total loss of integrity; data or system state can be fully modified.
- Availability impact: None. No effect on availability.
Underlying weakness
CWE-918: Server-Side Request Forgery
The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.
Affected products
- Accellion File Transfer Appliance: up to and including 9_12_40