CVE-2019-16227: py-lmdb Invalid write operation

May 24, 2022 (updated September 30, 2024)

An issue was discovered in py-lmdb 0.97. For certain values of mn_flags, mdb_cursor_set triggers a memcpy with an invalid write operation within mdb_xcursor_init1. NOTE: this outcome occurs when accessing a data.mdb file supplied by an attacker.

References

github.com/TeamSeri0us/pocs/tree/master/lmdb/lmdb%20memcpy%20illegal%20dst
github.com/advisories/GHSA-pf3p-v9xp-mrvf
github.com/jnwatson/py-lmdb
github.com/pypa/advisory-database/tree/main/vulns/lmdb/PYSEC-2019-239.yaml
nvd.nist.gov/vuln/detail/CVE-2019-16227
pypi.org/project/lmdb

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