Cisco AnyConnect Secure Mobility Client for Windows Uncontrolled Search Path Vulnerability

Exploited · KEV 2022-10-24RansomwareMetasploit moduleCVE-2020-3153CWE-427

Exploited since 2022-10-24. No WAF vendor names it yet.

Edge rules

0/8

Our test

No exploit yet

CVSS

6.5

EPSS

28.5% Top 2%

Posts, 14d

Published

2020-02-19

A vulnerability in the installer component of Cisco AnyConnect Secure Mobility Client for Windows could allow an authenticated local attacker to copy user-supplied files to system level directories with system level privileges. The vulnerability is due to the incorrect handling of directory paths. An attacker could exploit this vulnerability by creating a malicious file and copying the file to a system directory. An exploit could allow the attacker to copy malicious files to arbitrary locations with system level privileges. This could include DLL pre-loading, DLL hijacking, and other related attacks. To exploit this vulnerability, the attacker needs valid credentials on the Windows system.

Edge coverage

Claimed by vendors

CloudflareBefore feed historyOlder than its feed AWSNo public claimNot named Microsoft AzureNo public claimNot named Google CloudBefore feed historyOlder than its feed FastlyBefore feed historyOlder than its feed F5Before feed historyOlder than its feed AkamaiNo public sourceNo public changelog OWASP CRSBefore feed historyOlder than its feed

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Ask about CVE-2020-3153: who's covered, what to patch first, how vendors compare. I cite sources and won't help with attacks.

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Severity, decoded

CVSS 3.0

6.5Medium

Medium · 6.5 / 10

Exploitable with local access, with low privileges and no user interaction, leading to full loss of integrity, and the impact can reach components beyond the vulnerable one.

Needs local accessAny user loginNo user actionWorks reliablySpreads beyond the appSerious impact

How the score is built8 metrics

Attack vectorAn attacker needs local access, or must trick a user into opening something on the machine.
Local
Attack complexityNo special conditions are needed; the attack works reliably.
Low
Privileges requiredThe attacker needs an ordinary user account.
Low
User interactionNo one has to click or open anything; the attack works on its own.
None
ScopeThe attack can spread beyond the vulnerable component to other parts of the system.
Changed
Confidentiality impactNo data is exposed.
None
Integrity impactAn attacker can change any data or files the affected component protects.
High
Availability impactThe component keeps working normally.
None

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N

CISA's assessmentSSVC, from the CVE record

ExploitationActive

Attackers are exploiting this in the wild.

AutomatableNo

At least one step needs hands-on work, which slows mass attacks.

Technical impactPartial

A successful attack gives limited control over the affected software or limited access to its data.

Public exploits

1 found

1 Metasploit0 Exploit-DB0 Scanner template0 GitHub PoCs

MetasploitCisco AnyConnect Privilege Escalations (CVE-2020-3153 and CVE-2020-3433)2020-08-05 · exploit · rank Excellent · has check

Links are to third-party code: never run it outside an isolated lab.

Timeline

2020-02-19
CVE published
CVE List
2020-08-05
Metasploit module published
Cisco AnyConnect Privilege Escalations (CVE-2020-3153 and CVE-2020-3433)
2022-10-24
Added to CISA KEV
Confirmed exploitation in the wild