CVE-2023-5594
Improper following of a certificate's chain of trust in ESET security products
No known exploitation. EPSS puts it in the 29th percentile. A vendor fix is available.
What to do
The vendor has published a fix. Version details are below where the sources state them.
What it is
From the CVE record
Improper validation of the server’s certificate chain in secure traffic scanning feature considered intermediate certificate signed using the MD5 or SHA1 algorithm as trusted.
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.
- CISA KEV
Not in the catalog. CISA has not confirmed exploitation.
- Public exploits
No public exploit or proof of concept found in the sources we track.
- EPSS
0.4% chance of exploitation activity in the next 30 days, which ranks it in the 29th percentile of scored CVEs.
Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.
Lifecycle
5 events over 336 days, from the signal feeds we watch.
- Patch availablerecord updated
- Publishedweakness classified, att&ck mapped
Affected products
- ESET NOD32 AntivirusSecurity Products / endpoint-av-edr
- ESET Internet SecuritySecurity Products / endpoint-av-edr
- ESET Smart Security PremiumSecurity Products / endpoint-av-edr
- ESET Security UltimateSecurity Products / endpoint-av-edr
- ESET Endpoint AntivirusSecurity Products / endpoint-av-edr
- ESET Endpoint SecuritySecurity Products / endpoint-av-edr
- ESET Endpoint Antivirus for Linux 10.0 and aboveSecurity Products / endpoint-av-edr
- ESET Server Security for Windows ServerSecurity Products / endpoint-av-edr
- ESET Internet SecuritySecurity Products
- ESET Smart Security PremiumSecurity Products
- ESET Endpoint AntivirusSecurity Products
- ESET Endpoint SecuritySecurity Products
- ESET Server Security for Microsoft Windows ServerSecurity Products
- ESET Mail Security for Microsoft Exchange ServerSecurity Products
- ESET Mail Security for IBM DominoSecurity Products
- ESET Security for Microsoft SharePoint ServerSecurity Products
And 10 more affected products. See all after sign-in
Technical detail
CVSS 3.1 vector
Open in the CVSS calculatorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:L/A:N
Scored 7.5 by NVD.
How it is reached
- Attack Vector NetworkExploitable remotely over the network without any special conditions
- Attack Complexity HighRequires specific conditions like a race condition or non-default configuration
- Privileges Required NoneNo authentication required — anyone can exploit this
- User Interaction NoneNo user interaction needed — fully automated exploitation
Scope
- Scope ChangedThe exploit can affect other components (e.g. sandbox escape, host compromise from VM)
Impact if exploited
- Confidentiality HighTotal information disclosure — all data in the component is compromised
- Integrity LowData modification is possible but limited in scope or consequence
- 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
- support.eset.com/en/ca8562-eset-customer-advisory-improper-following-of-a-certificates-chain-of-trust-in-eset-security-products-fixed&
- cybersecurity-help.cz/vdb/SB2023122132
- support.eset.com/en/ca8562-eset-customer-advisory-improper-following-of-a-certificates-chain-of-trust-in-eset-security-products-fixed
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