CVE-2023-7101 on CISA KEV

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

01What CISA says about this vulnerability

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…

02Required action — verbatim from CISA

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

03Notes & references

• github.com — https://github.com/mandiant/Vulnerability-Disclosures/blob/master/2023/MNDT-2023…
• https: — https://https://www.cve.org/CVERecord?id=CVE-2023-7101
• https: — https://https://metacpan.org/dist/Spreadsheet-ParseExcel
• https: — https://https://github.com/haile01/perl_spreadsheet_excel_rce_poc
• github.com — https://github.com/jmcnamara/spreadsheet-parseexcel/blob/c7298592e102a375d43150c…
• www.openwall.com — http://www.openwall.com/lists/oss-security/2023/12/29/4
• lists.debian.org — https://lists.debian.org/debian-lts-announce/2023/12/msg00025.html
• https: — https://https://github.com/jmcnamara/spreadsheet-parseexcel/commit/bd3159277e745…
• lists.fedoraproject.org — https://lists.fedoraproject.org/archives/list/[email protected]…
• lists.fedoraproject.org — https://lists.fedoraproject.org/archives/list/[email protected]…
• security.metacpan.org — https://security.metacpan.org/2024/02/10/vulnerable-spreadsheet-parsing-modules.…

04SARA's analyst layer — why this matters

This vulnerability is currently on the CISA KEV list, which CISA only adds CVEs to when there is reliable evidence of active exploitation in the wild. For federal civilian agencies, BOD 22-01 requires remediation by the due date above. For everyone else, KEV is the strongest "patch immediately" signal you can get from public threat intel.

05Affected products (summary)

06Detection

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