CyberSecBulletin
CVE-2022-20785NVD status: Modified

Cisco AMP for Endpoints: Missing Release of Memory after Effective Lifetime

Published Updated By the CyberSecBulletin desk

CVE-2022-20785 is a high-severity missing release of memory after effective lifetime vulnerability in Cisco AMP for Endpoints 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. There is no confirmed exploitation so far. EPSS estimates a 7.12% chance of exploitation within 30 days, which is in the top 5.65% of all scored CVEs.

Next patch cycle

High severity with no evidence of exploitation so far.

What to do

  1. Update Clamav to 0.103.5 or 0.104.2, whichever matches your release line, or a later version.
  2. Update Secure Endpoint to 1.16.3 or 1.17.2 or 7.5.5 or 1.18.2, whichever matches your release line, or a later version.
  3. 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 AMP for EndpointsNot specified in the recordNot stated
ClamavClamavbefore 0.103.5; 0.103.5 and earlier; 0.104.0 up to, but not including, 0.104.20.103.5, 0.104.2
CiscoSecure Endpointbefore 1.16.3; before 1.17.2; before 7.5.5; 1.18.0 up to, but not including, 1.18.21.16.3, 1.17.2, 7.5.5, 1.18.2
Fedora ProjectFedora34; 35; 36Not stated
DebianDebian Linux9.0Not 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
CVSS 2.07.8HighNVD

Official description

On April 20, 2022, the following vulnerability in the ClamAV scanning library versions 0.103.5 and earlier and 0.104.2 and earlier was disclosed: A vulnerability in HTML file parser of Clam AntiVirus (ClamAV) versions 0.104.0 through 0.104.2 and LTS version 0.103.5 and prior versions could allow an unauthenticated, remote attacker to cause a denial of service condition on an affected device. For a description of this vulnerability, see the ClamAV blog. This advisory will be updated as additional information becomes available.

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

The underlying weakness: Missing Release of Memory after Effective Lifetime

The product does not sufficiently track and release allocated memory after it has been used, making the memory unavailable for reallocation and reuse.

How developers prevent this class of flaw

  • Choose a language or tool that provides automatic memory management, or makes manual memory management less error-prone. For example, glibc in Linux provides protection against free of invalid pointers. When using Xcode to target OS X or iOS, enable automatic reference counting (ARC). To help correctly and consistently manage memory when programming in C++, consider using a smart pointer class such as std
  • Use an abstraction library to abstract away risky APIs. Not a complete solution.
  • Consider using the Boehm-Demers-Weiser garbage collector (bdwgc), which can help avoid leaks.

More Missing Release of Memory after Effective Lifetime vulnerabilities (CWE-401)

Timeline

  1. CVE record published.
  2. CISA published its SSVC assessment (exploitation: none, automatable: yes, technical impact: partial).
  3. Record last changed materially (score, affected products, status or references).

References

Other vulnerabilities in Cisco AMP for Endpoints

All Cisco AMP for Endpoints vulnerabilities

Recent Missing Release of Memory after Effective Lifetime vulnerabilities

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