Observable Timing Discrepancy Affecting wolfSSL/wolfssh package, versions [,5.6.6)


Severity

Recommended
0.0
medium
0
10

CVSS assessment made by Snyk's Security Team

    Threat Intelligence

    EPSS
    0.04% (11th percentile)

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  • Snyk ID SNYK-UNMANAGED-WOLFSSLWOLFSSH-7853260
  • published 30 Aug 2024
  • disclosed 29 Aug 2024
  • credit Florian Sieck, Zhiyuan Zhang, Sebastian Berndt, Chitchanok Chuengsatiansup, Thomas Eisenbarth, Yuval Yarom

How to fix?

Upgrade wolfSSL/wolfssh to version 5.6.6 or higher.

Overview

Affected versions of this package are vulnerable to Observable Timing Discrepancy due to the side-channel protected T-Table implementation. An attacker can gain per instruction sub-cache-line resolution allowing them to break the cache-line-level protection by exploiting the controlled environment such as Intel SGX.

References

CVSS Scores

version 4.0
version 3.1
Expand this section

Snyk

Recommended
5.6 medium
  • Attack Vector (AV)
    Local
  • Attack Complexity (AC)
    High
  • Attack Requirements (AT)
    None
  • Privileges Required (PR)
    High
  • User Interaction (UI)
    None
  • Confidentiality (VC)
    High
  • Integrity (VI)
    None
  • Availability (VA)
    None
  • Confidentiality (SC)
    None
  • Integrity (SI)
    None
  • Availability (SA)
    None