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CVE-2024-20359

Exploited in the wild. In CISA KEV since 2024‑04‑24. A vendor fix is available.

CVSS 3.16.0MediumEPSS percentile97th19% chance in 30 daysCISA KEVListedsince 2024-04-24, due 2024-05-01
Public exploit: 1 sourceFixVendor fixNo build named by the sources

Published Updated Sources: CVE.org, NVD, BDU

NVD CVE.org

What to do

The vendor has published a fix. Version details are below where the sources state them.

  • Cisco Adaptive Security Appliance SoftwareAffected: 9.8.1Upgrade to: not statedAffected: 9.8.1.5Upgrade to: not statedAffected: 9.8.1.7Upgrade to: not statedAffected: 9.8.2Upgrade to: not stated + 183 more branchesStated by: CVE record
  • Cisco Firepower Threat Defense SoftwareAffected: 6.2.3Upgrade to: not statedAffected: 6.2.3.1Upgrade to: not statedAffected: 6.2.3.2Upgrade to: not statedAffected: 6.2.3.3Upgrade to: not stated + 76 more branchesStated by: CVE record
  • Cisco Systems Inc. Firepower Threat DefenseAffected: 6.2.3Upgrade to: not statedStated by: BDU
  • Cisco Systems Inc. Adaptive Security ApplianceAffected: 9.8.4.22Upgrade to: not statedStated by: BDU

Versions as the sources state them. Full version matrix after sign-in

Check it yourselfA free OpenVAS check exists for this CVE. Run it against your hosts.Is your organisation exposed?Request an assessment to establish which checks fit your systems.

Coverage timeline

0 publishers

  1. Added to CISA KEV catalog

    ·CISA KEV

Sourced from public security reporting — each date is when it was published, not when it happened.

What it is

From the CVE record

A vulnerability in a legacy capability that allowed for the preloading of VPN clients and plug-ins and that has been available in Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an authenticated, local attacker to execute arbitrary code with root-level privileges. Administrator-level privileges are required to exploit this vulnerability. This vulnerability is due to improper validation of a file when it is read from system flash memory. An attacker could exploit this vulnerability by copying a crafted file to the disk0: file system of an affected device. A successful exploit could allow the attacker to execute arbitrary code on the affected device after the next reload of the device, which could alter system behavior. Because the injected code could persist across device reboots, Cisco has raised the Security Impact Rating (SIR) of this advisory from Medium to High.

In plain language

No plain-language summary for this CVE yet.

Exploitation

Where each signal puts this CVE on the scale from published to confirmed exploited.

EPSS97th
Public exploit
CISA KEV
CISA KEV

Listed as exploited in the wild since 2024-04-24.

US federal agencies must remediate by 2024-05-01.

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Public exploits

1 source with a proof of concept or module.

Exploit links, PoCs and Metasploit modules after sign-in
EPSS

19% chance of exploitation activity in the next 30 days, which ranks it in the 97th percentile of scored CVEs.

Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.

Lifecycle

The patch came 129 days before any public exploit.

  1. Patch availablerecord updated
  2. OpenVAS check added
  3. EPSS band changelow → moderate
  4. Public exploit / PoCsource: other
  5. Patch availablerecord updated
  6. Added to CISA KEVpublished, weakness classified, att&ck mapped

Affected products

Technical detail

CVSS 3.1 vector

Open in the CVSS calculator

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

Scored 6.0 by NVD.

How it is reached

  • Attack Vector LocalRequires local access to the vulnerable system (e.g. local login, malicious file)
  • Attack Complexity LowNo special conditions — the attack can be reliably reproduced
  • Privileges Required HighRequires admin or elevated privileges
  • User Interaction NoneNo user interaction needed — fully automated exploitation

Scope

  • Scope UnchangedImpact is limited to the vulnerable component itself

Impact if exploited

  • Confidentiality HighTotal information disclosure — all data in the component is compromised
  • Integrity HighTotal loss of integrity — attacker can modify any data in the component
  • Availability NoneNo availability impact

Weaknesses

ATT&CK techniques

Mapped from the weaknesses above (CWE to ATT&CK), not observed in attacks.

Sources

References in the record

And 3 more references. See all after sign-in

Analysis on the cve.tools blog

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We'll flag the next CVE, public exploit or patch for Cisco, not every advisory. This one: actively exploited.