Buffer overflow in Wps Office
CVE-2018-6390
The WStr::assign function in kso.dll in Kingsoft WPS Office 10.1.0.7106 and 10.2.0.5978 does not validate the size of the source memory block before an _copy call, which allows remote attackers to cause a denial of service (access violation and application crash) via a crafted (a) web page, (b) office document, or (c) .rtf file.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.011 (63.7th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 64th percentile — 63.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000
Affected products
- Wps Office — versions 10.1.0.7106, 10.2.0.5978
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/Khwarezmia/WPS_POC/tree/master/wps_20180129 (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2018-6390?
- CVE-2018-6390 is a medium-severity vulnerability in Wps Office, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 6.5/10. Published 2018-01-29.
- How severe is CVE-2018-6390?
- Medium severity. CVSS v3 base score is 6.5 out of 10.
- Is CVE-2018-6390 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.