CyberSecBulletin
CVE-2023-20197NVD status: Modified

Cisco Secure Endpoint: Loop with Unreachable Exit Condition

Published Updated By the CyberSecBulletin desk

CVE-2023-20197 is a high-severity loop with unreachable exit condition vulnerability in Cisco Secure Endpoint from Cisco, with a CVSS 3.1 base score of 7.5 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. Affected Cisco Secure Endpoint versions: 6.0.9; 6.0.7; 6.1.5, and others listed below. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 1.17% chance of exploitation within 30 days, higher than 68% of scored CVEs.

Next patch cycle

High severity with no evidence of exploitation so far.

What to do

  1. Update Secure Endpoint to 1.22.0 or 7.5.13.21586 or 8.1.7.21585, whichever matches your release line, or a later version.
  2. Update Secure Endpoint Private Cloud to 3.8.0 or a later version.
  3. Read the advisory on sec.cloudapps.cisco.com for workarounds and exact fixed builds.
  4. Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.

Affected products and versions

VendorProductAffected versionsFixed in
CiscoCisco Secure Endpoint6.0.9; 6.0.7; 6.1.5; 6.1.7; 6.1.9; 6.2.1; 6.2.5; 6.2.19; and 32 more rangesNot stated
CiscoCisco Secure Endpoint Private Cloud ConsoleNot specified in the recordNot stated
CiscoSecure Endpointbefore 1.22.0; before 7.5.13.21586; 8.0.1.21160 up to, but not including, 8.1.7.215851.22.0, 7.5.13.21586, 8.1.7.21585
CiscoSecure Endpoint Private Cloudbefore 3.8.03.8.0
Fedora ProjectFedora38Not stated

Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.

How the severity score breaks down

Attack vector
NetworkCan be exploited remotely over a network, including the internet.
Attack complexity
LowNo special conditions are needed; the attack works reliably.
Privileges required
NoneNo account or login is needed.
User interaction
NoneNo action by a victim is required.
Scope
UnchangedImpact stays within the vulnerable component.
Confidentiality
NoneNo data is disclosed.
Integrity
NoneNothing can be modified.
Availability
HighThe component can be taken down completely.

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H. Scored by NVD.

Scoring systemScoreSeverityScored by
CVSS 3.17.5HighCNA (cisco.com)
CVSS 3.17.5HighNVD

Official description

A vulnerability in the filesystem image parser for Hierarchical File System Plus (HFS+) of ClamAV could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to an incorrect check for completion when a file is decompressed, which may result in a loop condition that could cause the affected software to stop responding. An attacker could exploit this vulnerability by submitting a crafted HFS+ filesystem image to be scanned by ClamAV on an affected device. A successful exploit could allow the attacker to cause the ClamAV scanning process to stop responding, resulting in a DoS condition on the affected software and consuming available system resources. For a description of this vulnerability, see the ClamAV blog .

Source: the CVE record as published by its numbering authority, via NVD and CVE.org.

The underlying weakness: Loop with Unreachable Exit Condition

The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop.

More Loop with Unreachable Exit Condition vulnerabilities (CWE-835)

Timeline

  1. CVE record published.
  2. Record last changed materially (score, affected products, status or references).

References

Other vulnerabilities in Cisco Secure Endpoint

All Cisco Secure Endpoint vulnerabilities

Recent Loop with Unreachable Exit Condition vulnerabilities

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