What’s Vulnerable › Vulnerabilities

CVE-2011-4574

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-10-27 · updated 2026-06-16
• Weakness: CWE-338

Description

PolarSSL versions prior to v1.1 use the HAVEGE random number generation algorithm. At its heart, this uses timing information based on the processor's high resolution timer (the RDTSC instruction). This instruction can be virtualized, and some virtual machine hosts have chosen to disable this instruction, returning 0s or predictable results.

Affected products

• PolarSSL: before 1.1.0 — fixed in 1.1.0

How to fix

Upgrade to a fixed version: PolarSSL 1.1.0. Check the vendor advisory for mitigations.

References

• https://tls.mbed.org/tech-updates/security-advisories/polarssl-security-advisory-2011-02
• https://tls.mbed.org/tech-updates/security-advisories/polarssl-security-advisory-2011-02

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