Victor Julien

12 exploits Active since Oct 2017
CVE-2019-18625 WRITEUP HIGH WRITEUP
Suricata 5.0.0 - TCP Signature Bypass via Spoofed RST ACK and FIN ACK Packets
An issue was discovered in Suricata 5.0.0. It was possible to bypass/evade any tcp based signature by faking a closed TCP session using an evil server. After the TCP SYN packet, it is possible to inject a RST ACK and a FIN ACK packet with a bad TCP Timestamp option. The client will ignore the RST ACK and the FIN ACK packets because of the bad TCP Timestamp option. Both linux and windows client are ignoring the injected packets.
CVSS 7.5
CVE-2019-18792 WRITEUP CRITICAL WRITEUP
Suricata 5.0.0 - TCP Signature Bypass via Overlapping FIN Packet
An issue was discovered in Suricata 5.0.0. It is possible to bypass/evade any tcp based signature by overlapping a TCP segment with a fake FIN packet. The fake FIN packet is injected just before the PUSH ACK packet we want to bypass. The PUSH ACK packet (containing the data) will be ignored by Suricata because it overlaps the FIN packet (the sequence and ack number are identical in the two packets). The client will ignore the fake FIN packet because the ACK flag is not set. Both linux and windows clients are ignoring the injected packet.
CVSS 9.1
CVE-2024-37151 WRITEUP MEDIUM WRITEUP
Suricata 6.0.0-6.0.19 - Policy Bypass via Fragmented Packet Reassembly Failure
Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. Mishandling of multiple fragmented packets using the same IP ID value can lead to packet reassembly failure, which can lead to policy bypass. Upgrade to 7.0.6 or 6.0.20. When using af-packet, enable `defrag` to reduce the scope of the problem.
CVSS 5.3
CVE-2024-55629 WRITEUP HIGH WRITEUP
Suricata < 7.0.8 - TCP Urgent Data Interpretation Conflict
Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. Prior to 7.0.8, TCP streams with TCP urgent data (out of band data) can lead to Suricata analyzing data differently than the applications at the TCP endpoints, leading to possible evasions. Suricata 7.0.8 includes options to allow users to configure how to handle TCP urgent data. In IPS mode, you can use a rule such as drop tcp any any -> any any (sid:1; tcp.flags:U*;) to drop all the packets with urgent flag set.
CVSS 7.5
CVE-2025-59147 WRITEUP HIGH WRITEUP
Suricata <7.0.11 & 8.0.0 - Detection Bypass
Suricata is a network IDS, IPS and NSM engine developed by the OISF (Open Information Security Foundation) and the Suricata community. Versions 7.0.11 and below, as well as 8.0.0, are vulnerable to detection bypass when crafted traffic sends multiple SYN packets with different sequence numbers within the same flow tuple, which can cause Suricata to fail to pick up the TCP session. In IDS mode this can lead to a detection and logging bypass. In IPS mode this will lead to the flow getting blocked. This issue is fixed in versions 7.0.12 and 8.0.1.
CVSS 7.5
CVE-2017-15377 WRITEUP HIGH WRITEUP
Suricata < 3.2.4 - Denial of Service via Crafted Network Traffic
In Suricata before 4.x, it was possible to trigger lots of redundant checks on the content of crafted network traffic with a certain signature, because of DetectEngineContentInspection in detect-engine-content-inspection.c. The search engine doesn't stop when it should after no match is found; instead, it stops only upon reaching inspection-recursion-limit (3000 by default).
CVSS 7.5
CVE-2019-18625 WRITEUP HIGH WRITEUP
Suricata 5.0.0 - TCP Signature Bypass via Spoofed RST ACK and FIN ACK Packets
An issue was discovered in Suricata 5.0.0. It was possible to bypass/evade any tcp based signature by faking a closed TCP session using an evil server. After the TCP SYN packet, it is possible to inject a RST ACK and a FIN ACK packet with a bad TCP Timestamp option. The client will ignore the RST ACK and the FIN ACK packets because of the bad TCP Timestamp option. Both linux and windows client are ignoring the injected packets.
CVSS 7.5
CVE-2019-18792 WRITEUP CRITICAL WRITEUP
Suricata 5.0.0 - TCP Signature Bypass via Overlapping FIN Packet
An issue was discovered in Suricata 5.0.0. It is possible to bypass/evade any tcp based signature by overlapping a TCP segment with a fake FIN packet. The fake FIN packet is injected just before the PUSH ACK packet we want to bypass. The PUSH ACK packet (containing the data) will be ignored by Suricata because it overlaps the FIN packet (the sequence and ack number are identical in the two packets). The client will ignore the fake FIN packet because the ACK flag is not set. Both linux and windows clients are ignoring the injected packet.
CVSS 9.1
CVE-2024-37151 WRITEUP MEDIUM WRITEUP
Suricata 6.0.0-6.0.19 - Policy Bypass via Fragmented Packet Reassembly Failure
Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. Mishandling of multiple fragmented packets using the same IP ID value can lead to packet reassembly failure, which can lead to policy bypass. Upgrade to 7.0.6 or 6.0.20. When using af-packet, enable `defrag` to reduce the scope of the problem.
CVSS 5.3
CVE-2024-55629 WRITEUP HIGH WRITEUP
Suricata < 7.0.8 - TCP Urgent Data Interpretation Conflict
Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. Prior to 7.0.8, TCP streams with TCP urgent data (out of band data) can lead to Suricata analyzing data differently than the applications at the TCP endpoints, leading to possible evasions. Suricata 7.0.8 includes options to allow users to configure how to handle TCP urgent data. In IPS mode, you can use a rule such as drop tcp any any -> any any (sid:1; tcp.flags:U*;) to drop all the packets with urgent flag set.
CVSS 7.5
CVE-2025-59147 WRITEUP HIGH WRITEUP
Suricata <7.0.11 & 8.0.0 - Detection Bypass
Suricata is a network IDS, IPS and NSM engine developed by the OISF (Open Information Security Foundation) and the Suricata community. Versions 7.0.11 and below, as well as 8.0.0, are vulnerable to detection bypass when crafted traffic sends multiple SYN packets with different sequence numbers within the same flow tuple, which can cause Suricata to fail to pick up the TCP session. In IDS mode this can lead to a detection and logging bypass. In IPS mode this will lead to the flow getting blocked. This issue is fixed in versions 7.0.12 and 8.0.1.
CVSS 7.5
CVE-2025-59149 WRITEUP MEDIUM WRITEUP
Suricata 8.0.0 - Stack-based Buffer Overflow via LDAP Response Attribute Type Rule Processing
Suricata is a network IDS, IPS and NSM engine developed by the OISF (Open Information Security Foundation) and the Suricata community. In version 8.0.0, rules using keyword ldap.responses.attribute_type (which is long) with transforms can lead to a stack buffer overflow during Suricata startup or during a rule reload. This issue is fixed in version 8.0.1. To workaround this issue, users can disable rules with ldap.responses.attribute_type and transforms.
CVSS 6.2