Critical severity · published Aug 26, 2020
CVE-2020-15158
In libIEC61850 before version 1.4.3, when a message with COTP message length field with value < 4 is received an integer underflow will happen leading to heap buffer overflow
9.8
CVSS
2%
EPSS
No
On KEV
Description
In libIEC61850 before version 1.4.3, when a message with COTP message length field with value < 4 is received an integer underflow will happen leading to heap buffer overflow. This can cause an application crash or on some platforms even the execution of remote code. If your application is used in open networks or there are untrusted nodes in the network it is highly recommend to apply the patch. This was patched with commit 033ab5b. Users of version 1.4.x should upgrade to version 1.4.3 when available. As a workaround changes of commit 033ab5b can be applied to older versions.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)2.0% · higher than 81% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
LI
Libiec61850 · Mz-automation
1.4.0 before 1.4.3 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-15158
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-15158
Patch
https://github.com/mz-automation/libiec61850/commit/033ab5b6488250c8c3b838f25a7cbc3e099230bb
Third Party Advisory
https://github.com/mz-automation/libiec61850/issues/250
Third Party Advisory
https://github.com/mz-automation/libiec61850/security/advisories/GHSA-pq77-fmf7-hjw8
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