What’s Vulnerable › Vulnerabilities

CVE-2020-28241

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2020-11-06 · updated 2026-06-17
• Weakness: CWE-125

Description

libmaxminddb before 1.4.3 has a heap-based buffer over-read in dump_entry_data_list in maxminddb.c.

Affected products

• Debian Linux: 9.0
• Fedoraproject Fedora: 32, 33
• Maxmind Libmaxminddb: before 1.4.3 — fixed in 1.4.3

How to fix

Upgrade to a fixed version: Maxmind Libmaxminddb 1.4.3. Check the vendor advisory for mitigations.

References

• https://github.com/maxmind/libmaxminddb/compare/1.4.2...1.4.3
• https://github.com/maxmind/libmaxminddb/issues/236
• https://github.com/maxmind/libmaxminddb/pull/237
• https://lists.debian.org/debian-lts-announce/2020/11/msg00019.html
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6WUK4UCOB5FJVK36E22IRLEYGKMUWGBG/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ELTOHZBPO6XVUVADP4DPZBNQCPTYOQBV/
• https://security.gentoo.org/glsa/202011-15
• https://github.com/maxmind/libmaxminddb/compare/1.4.2...1.4.3
• https://github.com/maxmind/libmaxminddb/issues/236
• https://github.com/maxmind/libmaxminddb/pull/237
• https://lists.debian.org/debian-lts-announce/2020/11/msg00019.html
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6WUK4UCOB5FJVK36E22IRLEYGKMUWGBG/

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