CVE-2021-28040

An issue was discovered in OSSEC 3.6.0. An uncontrolled recursion vulnerability in os_xml.c occurs when a large number of opening and closing XML tags is used. Because recursion is used in _ReadElem without restriction, an attacker can trigger a segmentation fault once unmapped memory is reached.

CVSS v3.1

7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS v2.0

5.0 MEDIUMAV:N/AC:L/Au:N/C:N/I:N/A:P

EPSS

1.19% chance of exploitation in the next 30 days, 66th percentile

Published

2021-03-05

Updated

2024-08-03

Proof-of-concept exploits (1)

• ossec/ossec-hids/issues/1953

References

• CVE Record
• NVD entry

Related

• CVE-2018-19666
• CVE-2020-8442
• CVE-2021-28026
• CVE-2021-28060
• CVE-2021-28021
• CVE-2021-28070