Out-of-bounds read in MaxMind libmaxminddb

1) Out-of-bounds read

EUVDB-ID: #VU48418

Risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-28241

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

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

External links

http://github.com/maxmind/libmaxminddb/compare/1.4.2...1.4.3
http://github.com/maxmind/libmaxminddb/issues/236
http://github.com/maxmind/libmaxminddb/pull/237
http://lists.debian.org/debian-lts-announce/2020/11/msg00019.html

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.