CVE-2023-24477

Session takeover via incomplete logout invalidation

Published Aug 9, 2023 · Updated Sep 20, 2024

Session fixation in Nozomi Networks Guardian and CMC before 22.6.2 allows local users to take over a logged-out user's session. Under timing-dependent conditions in Chrome, the logout path fails to fully invalidate the authenticated browser session. An authenticated local user must act within the timing window, and successful reuse grants the original user's application access.

CVSS severity5.4
Medium
EPSS probability0.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Session fixation in Nozomi Networks Guardian and CMC before 22.6.2 allows local users to take over a logged-out user's session. Under timing-dependent conditions in Chrome, the logout path fails to fully invalidate the authenticated browser session. An authenticated local user must act within the timing window, and successful reuse grants the original user's application access.

The record

CVE
CVE-2023-24477
Published
Aug 9, 2023
Updated
Sep 20, 2024
Vendor
Nozomi Networks
Product
Guardian
Classifications
CWE-384, CAPEC-61, T1550.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 9, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 20, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <22.6.2

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Nozomi Networks · Guardianversion=0 <22.6.2
Nozomi Networks · Central Management Console (CMC)version=0 <22.6.2

Published CVSS scores

5.4Nozomi NetworksCVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
7.0Nozomi NetworksCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
7.0NIST NVDCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-384Session Fixation
CAPEC-61Session Fixation
T1550.004Use Alternate Authentication Material: Web Session Cookie

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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