CVE-2015-9435

WP OAuth Server (OAuth Authentication) < 3.1.5 - Pseudorandom Number Generation

2015-08-12 00:00

Strategic Overview

Status: Patched in 3.1.5
Affected Plugin: WP OAuth Server (OAuth Authentication)
Affected Version: < 3.1.5
CVSS: 9.8Critical
Weakness type: CWE-338 · Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)
CVE: CVE-2015-9435

View all WP OAuth Server (OAuth Authentication) vulnerabilities

At a glance

CVE-2015-9435 is a critical-severity Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG) vulnerability in the WP OAuth Server (OAuth Authentication) WordPress plugin, affecting versions < 3.1.5. It carries a CVSS score of 9.8 (reachable over the network; low attack complexity; high confidentiality, integrity, availability impact). Exploitation requires no authentication. The issue is fixed in version 3.1.5; sites on affected versions should update now. Disclosed August 2015, reported by Mallory Adams.

Vulnerability Overview

The oauth2-provider plugin before 3.1.5 for WordPress has incorrect generation of random numbers.

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, integrity, availability — full site compromise territory.

CWE-338: Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)

The product uses a Pseudo-Random Number Generator (PRNG) in a security context, but the PRNG's algorithm is not cryptographically strong.

Remediation

Update to version 3.1.5, or a newer patched version

How does WordSec protect against this?

The fix is the thing that ends this: WP OAuth Server (OAuth Authentication) 3.1.5 closes this, and updating the plugin is the step that ends it.

Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2015-9435 https://www.wordfence.com/threat-intel/vulnerabilities/id/598fffcd-0318-4e41-8837-f65761390c19 https://nvd.nist.gov/vuln/detail/CVE-2015-9435

Related records

Other vulnerabilities in WP OAuth Server (OAuth Authentication)

CVSS Vector

9.8

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

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh

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