CVE-2017-16740: rockwellautomation 1766-l32awa Classic Buffer Overflow
CVSS: 10.0v3.0CriticalModified
Published 09-01-2018Last modified 05-08-2024
Vulnerability summary
CVE-2017-16740 is a critical (CVSS 10.0) Classic Buffer Overflow vulnerability in rockwellautomation 1766-l32awa. EPSS estimates a 7.20% chance of exploitation in the next 30 days, higher than 94.2% of scored vulnerabilities.
CVSS score
10.0/10
010
Critical · v3.0 (NVD)EPSS score
7.20%
0%100%
Low · +0.06 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 09-01-2018PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
Description
A Buffer Overflow issue was discovered in Rockwell Automation Allen-Bradley MicroLogix 1400 Controllers, Series B and C Versions 21.002 and earlier. The stack-based buffer overflow vulnerability has been identified, which may allow remote code execution.
CVSS metrics
2 scores · 1 source · 2 versionsCritical 10.0Preferred score · NVD (NIST)
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:HSourcesSingle source
High 7.5Preferred score · NVD (NIST)
AV:N/AC:L/Au:N/C:P/I:P/A:PSourcesSingle source
EPSS trend
Probability
7.20%
Chance of exploitation in the next 30 days
Percentile
94%
Versus all other CVEs
30-day change
+0.06 pp
From 7.14% on 22-09-2026
22-09-202622-10-2026
EPSS score7.20%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root cause- CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer.
- CWE-119Improper Restriction of Operations within the Bounds of a Memory BufferThe product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.
Affected systems
Rockwellautomation6 products
- 1766-l32awa≤ 21.002
- 1766-l32awaa≤ 21.002
- 1766-l32bwa≤ 21.002
- 1766-l32bwaa≤ 21.002
- 1766-l32bxb≤ 21.002
1 vendor · 6 products
References
3 links- rockwellautomation.custhelp.com/app/answers/detail/a_id/1070883X Refsource CONFIRM
- ics-cert.us-cert.gov/advisories/ICSA-18-009-01X Refsource MISCThird Party AdvisoryUS Government Resource