5.9
MEDIUM
CVE-2023-6935
Here is a potential title: "wolfSSL RSA Static Implementation Timing Attack Vulnerability"
Description

wolfSSL SP Math All RSA implementation is vulnerable to the Marvin Attack, new variation of a timing Bleichenbacher style attack, when built with the following options to configure: --enable-all CFLAGS="-DWOLFSSL_STATIC_RSA" The define “WOLFSSL_STATIC_RSA” enables static RSA cipher suites, which is not recommended, and has been disabled by default since wolfSSL 3.6.6.  Therefore the default build since 3.6.6, even with "--enable-all", is not vulnerable to the Marvin Attack. The vulnerability is specific to static RSA cipher suites, and expected to be padding-independent. The vulnerability allows an attacker to decrypt ciphertexts and forge signatures after probing with a large number of test observations. However the server’s private key is not exposed.

INFO

Published Date :

Feb. 9, 2024, 11:15 p.m.

Last Modified :

Nov. 21, 2024, 8:44 a.m.

Remotely Exploitable :

Yes !

Impact Score :

3.6

Exploitability Score :

2.2
Public PoC/Exploit Available at Github

CVE-2023-6935 has a 1 public PoC/Exploit available at Github. Go to the Public Exploits tab to see the list.

Affected Products

The following products are affected by CVE-2023-6935 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Wolfssl wolfssl
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2023-6935.

URL Resource
https://people.redhat.com/~hkario/marvin/ Technical Description
https://www.wolfssl.com/docs/security-vulnerabilities/ Vendor Advisory
https://people.redhat.com/~hkario/marvin/ Technical Description
https://www.wolfssl.com/docs/security-vulnerabilities/ Vendor Advisory

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

wolfssl for windows 98 (coming soon)

CMake Dockerfile Shell C++ C Makefile Euphoria Batchfile BitBake FreeMarker

Updated: 4 months, 2 weeks ago
0 stars 0 fork 0 watcher
Born at : Aug. 4, 2024, 10:26 a.m. This repo has been linked 3 different CVEs too.

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2023-6935 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2023-6935 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by af854a3a-2127-422b-91ae-364da2661108

    Nov. 21, 2024

    Action Type Old Value New Value
    Added Reference https://people.redhat.com/~hkario/marvin/
    Added Reference https://www.wolfssl.com/docs/security-vulnerabilities/
  • Initial Analysis by [email protected]

    Nov. 07, 2024

    Action Type Old Value New Value
    Added CVSS V3.1 NIST AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
    Changed Reference Type https://people.redhat.com/~hkario/marvin/ No Types Assigned https://people.redhat.com/~hkario/marvin/ Technical Description
    Changed Reference Type https://www.wolfssl.com/docs/security-vulnerabilities/ No Types Assigned https://www.wolfssl.com/docs/security-vulnerabilities/ Vendor Advisory
    Added CWE NIST CWE-203
    Added CPE Configuration OR *cpe:2.3:a:wolfssl:wolfssl:*:*:*:*:*:*:*:* versions from (including) 3.12.2 up to (including) 5.6.4
  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • CVE Received by [email protected]

    Feb. 09, 2024

    Action Type Old Value New Value
    Added Description wolfSSL SP Math All RSA implementation is vulnerable to the Marvin Attack, new variation of a timing Bleichenbacher style attack, when built with the following options to configure: --enable-all CFLAGS="-DWOLFSSL_STATIC_RSA" The define “WOLFSSL_STATIC_RSA” enables static RSA cipher suites, which is not recommended, and has been disabled by default since wolfSSL 3.6.6.  Therefore the default build since 3.6.6, even with "--enable-all", is not vulnerable to the Marvin Attack. The vulnerability is specific to static RSA cipher suites, and expected to be padding-independent. The vulnerability allows an attacker to decrypt ciphertexts and forge signatures after probing with a large number of test observations. However the server’s private key is not exposed.
    Added Reference wolfSSL Inc. https://people.redhat.com/~hkario/marvin/ [No types assigned]
    Added Reference wolfSSL Inc. https://www.wolfssl.com/docs/security-vulnerabilities/ [No types assigned]
    Added CWE wolfSSL Inc. CWE-203
    Added CVSS V3.1 wolfSSL Inc. AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2023-6935 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2023-6935 weaknesses.

Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.08 }} 0.04%

score

0.35638

percentile

CVSS31 - Vulnerability Scoring System
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