CVE-2019-16225: 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 mp_flags, mdb_page_touch does not properly set up mc->mc_pg[mc->top], leading to an invalid write operation. NOTE: this outcome occurs when accessing a data.mdb file supplied by an attacker.

References

github.com/TeamSeri0us/pocs/tree/master/lmdb/lmdb%20write%20to%20illegal%20address
github.com/advisories/GHSA-c74c-p4p7-r8q5
github.com/jnwatson/py-lmdb
github.com/pypa/advisory-database/tree/main/vulns/lmdb/PYSEC-2019-237.yaml
nvd.nist.gov/vuln/detail/CVE-2019-16225
pypi.org/project/lmdb

Code Behaviors & Features

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