CVE-2022-39843

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2022-09-05 · updated 2026-06-17
Weakness: CWE-787

Description

123elf Lotus 1-2-3 before 1.0.0rc3 for Linux, and Lotus 1-2-3 R3 for UNIX and other platforms through 9.8.2, allow attackers to execute arbitrary code via a crafted worksheet. This occurs because of a stack-based buffer overflow in the cell format processing routines, as demonstrated by a certain function call from process_fmt() that can be reached via a w3r_format element in a wk3 document.

Affected products

Lotus 1-2-3 Project Lotus 1-2-3: 1.0.0-rc1, 1.0.0-rc2

References

https://github.com/taviso/123elf/issues/103
https://github.com/taviso/123elf/releases/tag/v1.0.0rc3
https://github.com/taviso/123elf/issues/103
https://github.com/taviso/123elf/releases/tag/v1.0.0rc3

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