CVE-2024-20337

2024-03-0617:15:09

CWE-93

[email protected]

web.nvd.nist.gov

129

cve

2024

20337

vulnerability

saml

authentication

cisco

secure client

remote attacker

crlf

injection

vpn

session

exploit

8.2 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

CHANGED

Confidentiality Impact

HIGH

Integrity Impact

LOW

Availability Impact

NONE

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

8.6 High

AI Score

Confidence

High

0.0004 Low

EPSS

Percentile

9.1%

JSON

A vulnerability in the SAML authentication process of Cisco Secure Client could allow an unauthenticated, remote attacker to conduct a carriage return line feed (CRLF) injection attack against a user.

This vulnerability is due to insufficient validation of user-supplied input. An attacker could exploit this vulnerability by persuading a user to click a crafted link while establishing a VPN session. A successful exploit could allow the attacker to execute arbitrary script code in the browser or access sensitive, browser-based information, including a valid SAML token. The attacker could then use the token to establish a remote access VPN session with the privileges of the affected user. Individual hosts and services behind the VPN headend would still need additional credentials for successful access.

CNA Affected

[
  {
    "vendor": "Cisco",
    "product": "Cisco Secure Client",
    "versions": [
      {
        "version": "4.9.00086",
        "status": "affected"
      },
      {
        "version": "4.9.01095",
        "status": "affected"
      },
      {
        "version": "4.9.02028",
        "status": "affected"
      },
      {
        "version": "4.9.03047",
        "status": "affected"
      },
      {
        "version": "4.9.03049",
        "status": "affected"
      },
      {
        "version": "4.9.04043",
        "status": "affected"
      },
      {
        "version": "4.9.04053",
        "status": "affected"
      },
      {
        "version": "4.9.05042",
        "status": "affected"
      },
      {
        "version": "4.9.06037",
        "status": "affected"
      },
      {
        "version": "4.10.00093",
        "status": "affected"
      },
      {
        "version": "4.10.01075",
        "status": "affected"
      },
      {
        "version": "4.10.02086",
        "status": "affected"
      },
      {
        "version": "4.10.03104",
        "status": "affected"
      },
      {
        "version": "4.10.04065",
        "status": "affected"
      },
      {
        "version": "4.10.04071",
        "status": "affected"
      },
      {
        "version": "4.10.05085",
        "status": "affected"
      },
      {
        "version": "4.10.05095",
        "status": "affected"
      },
      {
        "version": "4.10.05111",
        "status": "affected"
      },
      {
        "version": "4.10.06079",
        "status": "affected"
      },
      {
        "version": "4.10.06090",
        "status": "affected"
      },
      {
        "version": "4.10.07061",
        "status": "affected"
      },
      {
        "version": "4.10.07062",
        "status": "affected"
      },
      {
        "version": "4.10.07073",
        "status": "affected"
      },
      {
        "version": "5.0.00238",
        "status": "affected"
      },
      {
        "version": "5.0.00529",
        "status": "affected"
      },
      {
        "version": "5.0.00556",
        "status": "affected"
      },
      {
        "version": "5.0.01242",
        "status": "affected"
      },
      {
        "version": "5.0.02075",
        "status": "affected"
      },
      {
        "version": "5.0.03072",
        "status": "affected"
      },
      {
        "version": "5.0.03076",
        "status": "affected"
      },
      {
        "version": "5.0.04032",
        "status": "affected"
      },
      {
        "version": "5.0.05040",
        "status": "affected"
      },
      {
        "version": "5.1.0.136",
        "status": "affected"
      },
      {
        "version": "5.1.1.42",
        "status": "affected"
      }
    ]
  }
]