CVE-2017-2551

BackWPup <= 3.4.1 - Unauthenticated Backup Download

2017-09-08 00:00

Strategic Overview

Status: Patched in 3.4.2
Affected Plugin: BackWPup – WordPress Backup & Restore Plugin
Affected Version: < 3.4.2
CVSS: 7.5High
Weakness type: CWE-552 · Files or Directories Accessible to External Parties
CVE: CVE-2017-2551

View all BackWPup – WordPress Backup & Restore Plugin vulnerabilities

At a glance

CVE-2017-2551 is a high-severity Files or Directories Accessible to External Parties vulnerability in the BackWPup WordPress plugin, affecting versions < 3.4.2. It carries a CVSS score of 7.5 (reachable over the network; low attack complexity; high confidentiality impact). Exploitation requires no authentication. The issue is fixed in version 3.4.2; sites on affected versions should update now. Disclosed September 2017, reported by Larry W. Cashdollar.

Vulnerability Overview

Vulnerability in Wordpress plugin BackWPup before v3.4.2 allows possible brute forcing of backup file for download.

Technical Analysis

The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no privileges on the target site, and no interaction from a victim user. A successful exploit has high impact on confidentiality.

CWE-552: Files or Directories Accessible to External Parties

The product makes files or directories accessible to unauthorized actors, even though they should not be.

Remediation

Update to version 3.4.2, or a newer patched version

How does WordSec protect against this?

Requests carrying this pattern arrive without a session, so nothing upstream of the firewall gets a chance to reject them: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: BackWPup 3.4.2 closes this, and updating the plugin is the step that ends it.

Firewall
Login Security
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2017-2551 https://www.wordfence.com/threat-intel/vulnerabilities/id/e4c58479-2924-4b56-9c27-3bdf4be388a3 https://nvd.nist.gov/vuln/detail/CVE-2017-2551

Related records

Other vulnerabilities in BackWPup – WordPress Backup & Restore Plugin

CVSS Vector

7.5

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityNone
AvailabilityNone

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