Integer overflow in Libxls

CVE-2017-12109

An exploitable integer overflow vulnerability exists in the xls_preparseWorkSheet function of libxls 1.4 when handling a MULRK record. A specially crafted XLS file can cause a memory corruption resulting in remote code execution. An attacker can send malicious XLS file to trigger this vulnerability.

Vulnerability class: Integer Overflow

Published · last modified .

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.027 (85.5th percentile), scored .

Low probability of exploitation in the next 30 days, but still tracked. 86th percentile — 85.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2017-12109: held from 0.028 to 0.027.

EPSS over last 30 days · oldest: 0.028 · newest: 0.027 · change: -0.000

Affected products

  • Libxls — versions 1.4 readxl package 1.0.0 for R (tested using Microsoft R 4.3.1)
  • Libxls Project — versions 1.4

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2017-12109?
CVE-2017-12109 is a high-severity vulnerability in Libxls, classified under Integer Overflow or Wraparound. CVSS score: 8.8/10. Published 2018-04-24.
How severe is CVE-2017-12109?
High severity. CVSS v3 base score is 8.8 out of 10.