Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. From 7.0.13 until 7.0.17, the SMTP MIME quoted-printable decoder in src/util-decode-mime.c can read one byte past a heap buffer when a quoted-printable escape sequence is split across traffic chunks and the following chunk contains exactly one byte. Crafted SMTP traffic can trigger the out-of-bounds read and crash Suricata when decode-quoted-printable MIME decoding is enabled.
This issue is fixed in version 7.0.17.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
Low
Partial data leak
Integrity
None
No data modification
Availability
High
Complete denial of service
CVSS Vector v3.1
Weakness Type (CWE)
References 4
https://github.com/OISF/suricata/commit/19880f9d5bbe2b8f8e8867a577848dce2b532c86
security-advisories@github.com
https://github.com/OISF/suricata/releases/tag/suricata-7.0.17
security-advisories@github.com
https://github.com/OISF/suricata/security/advisories/GHSA-qxm4-q7vx-7xj4
security-advisories@github.com
https://redmine.openinfosecfoundation.org/issues/8608
security-advisories@github.com