CVE-2021-46143 In doProlog in xmlparse.c in Expat (aka libexpat) before 2.4.3, an integer overflow exists for m_groupSize

Description

In doProlog in xmlparse.c in Expat (aka libexpat) before 2.4.3, an integer overflow exists for m_groupSize.

Affected products and versions

Product	Affected versions	Fixed in
n/a	Versions not published
SIMATIC S7-1500 CPU 1518-4 PN/DP MFP 3.1	3.1.0 → < 3.1.5	3.1.5
SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP 3.1	3.1.0 → < 3.1.5	3.1.5
SIPLUS S7-1500 CPU 1518-4 PN/DP MFP 3.1	3.1.0 → < 3.1.5	3.1.5

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