#VU48418 Out-of-bounds read in libmaxminddb - CVE-2020-28241

Vulnerability identifier: #VU48418

Vulnerability risk: Medium

CVSSv4.0: 4.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-28241

CWE-ID: CWE-125

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
libmaxminddb
Other software / Other software solutions

Vendor: MaxMind

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to heap-based buffer over-read in dump_entry_data_list in maxminddb.c. A remote attacker can perform a denial of service attack.

Mitigation
Update to version 1.4.3.

Vulnerable software versions

libmaxminddb: 1.4.0 - 1.4.2

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External links
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

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.