PT-2020-11097 · Wago · Wago Pfc 200
Kelly Leuschner
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Published
2020-03-11
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Updated
2020-03-17
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CVE-2019-5178
CVSS v3.1
7.8
High
| Vector | AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Name of the Vulnerable Software and Affected Versions
WAGO PFC 200 Firmware version 03.02.02(14)
Description
A stack buffer overflow issue exists in the iocheckd service's 'I/O-Check' functionality. This can be triggered by sending a specially crafted packet, causing the parsing of a cache file. The
sprintf() function overflows the destination buffer sp+0x440 when handling hostname values greater than a specific length. A hostname value of length 0x3fd can cause the service to crash.Recommendations
For WAGO PFC 200 Firmware version 03.02.02(14), consider restricting the length of hostname values to prevent the overflow, or avoid using the
sprintf() function for unvalidated input until a patch is available. As a temporary workaround, consider disabling the iocheckd service's 'I/O-Check' functionality to minimize the risk of exploitation.Exploit
Fix
Memory Corruption
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Weakness Enumeration
Related Identifiers
Affected Products
Wago Pfc 200