Spreadsheet::ParseExcel version 0.65 is a Perl module used for parsing Excel files. Spreadsheet::ParseExcel is vulnerable to an arbitrary code execution (ACE) vulnerability due to passing unvalidated input from a file into a string-type “eval”. Specifically, the issue stems from the evaluation of Number format strings (not to be confused with printf-style format strings) within the Excel parsing logic.
| Capability ID | Capability Description | Mapping Type | ATT&CK ID | ATT&CK Name | Notes |
|---|---|---|---|---|---|
| CVE-2023-7101 | Spreadsheet::ParseExcel Remote Code Execution Vulnerability | secondary_impact | T1105 | Ingress Tool Transfer |
Comments
This vulnerability is exploited by a remote attacker by passing unvalidated input from a file into a string-type "eval". Specifically, the issue stems from the evaluation of Number format strings (not to be confused with printf-style format strings) within the Excel parsing logic. After successful exploitation, the attacker gains the ability to perform remote code execution. This vulnerability has been targeted by Chinese hackers who exploited the vulnerability in Spreadsheet::ParseExcel to compromise appliances. In collaboration with cybersecurity firm Mandiant, Barracuda assesses that the threat actor behind the attacks is UNC4841, who leveraged the flaw to deploy ‘SeaSpy’ and ‘Saltwater’ malware.
References
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| CVE-2023-7101 | Spreadsheet::ParseExcel Remote Code Execution Vulnerability | primary_impact | T1059 | Command and Scripting Interpreter |
Comments
This vulnerability is exploited by a remote attacker by passing unvalidated input from a file into a string-type "eval". Specifically, the issue stems from the evaluation of Number format strings (not to be confused with printf-style format strings) within the Excel parsing logic. After successful exploitation, the attacker gains the ability to perform remote code execution. This vulnerability has been targeted by Chinese hackers who exploited the vulnerability in Spreadsheet::ParseExcel to compromise appliances. In collaboration with cybersecurity firm Mandiant, Barracuda assesses that the threat actor behind the attacks is UNC4841, who leveraged the flaw to deploy ‘SeaSpy’ and ‘Saltwater’ malware.
References
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| CVE-2023-7101 | Spreadsheet::ParseExcel Remote Code Execution Vulnerability | exploitation_technique | T1190 | Exploit Public-Facing Application |
Comments
This vulnerability is exploited by a remote attacker by passing unvalidated input from a file into a string-type "eval". Specifically, the issue stems from the evaluation of Number format strings (not to be confused with printf-style format strings) within the Excel parsing logic. After successful exploitation, the attacker gains the ability to perform remote code execution. This vulnerability has been targeted by Chinese hackers who exploited the vulnerability in Spreadsheet::ParseExcel to compromise appliances. In collaboration with cybersecurity firm Mandiant, Barracuda assesses that the threat actor behind the attacks is UNC4841, who leveraged the flaw to deploy ‘SeaSpy’ and ‘Saltwater’ malware.
References
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