CVE-2019-5186

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Summary

CVECVE-2019-5186
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2020-03-23 14:15:00 UTC
Updated2021-07-21 11:39:00 UTC
DescriptionAn exploitable stack buffer overflow vulnerability vulnerability exists in the iocheckd service "I/O-Check" functionality of WAGO PFC 200. An attacker can send a specially crafted packet to trigger the parsing of this cache file.At 0x1eb9c the extracted interface element name from the xml file is used as an argument to /etc/config-tools/config_interfaces interface=<contents of interface element> using sprintf(). The destination buffer sp+0x40 is overflowed with the call to sprintf() for any interface values that are greater than 512-len("/etc/config-tools/config_interfaces interface=") in length. Later, at 0x1ea08 strcpy() is used to copy the contents of the stack buffer that was overflowed sp+0x40 into sp+0x440. The buffer sp+0x440 is immediately adjacent to sp+0x40 on the stack. Therefore, there is no NULL termination on the buffer sp+0x40 since it overflowed into sp+0x440. The strcpy() will result in invalid memory access. An interface value of length 0x3c4 will cause the service to crash.

Risk And Classification

Problem Types: CWE-787 | CWE-120

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Hardware Wago Pfc200 - All All All
Hardware Wago Pfc200 - All All All
Operating System Wago Pfc200 Firmware 03.02.02(14) All All All
Operating System Wago Pfc200 Firmware 03.02.02\(14\) All All All
Operating System Wago Pfc200 Firmware 03.02.02\(14\) All All All

References

ReferenceSourceLinkTags
TALOS-2019-0966 || Cisco Talos Intelligence Group - Comprehensive Threat Intelligence MISC talosintelligence.com Exploit, Mitigation, Third Party Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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