Application Layer Gateway (ALG) Explained: What it is & Why You Need it ?

Snippet When you hear "Application Layer Gateway," or ALG for short, think of it as a network traffic conductor. It's the unsung hero that examines data packets, making sure they follow specific rules and get to where they're supposed to go—securely and efficiently. Quick Facts Definition In the...

CVE-2023-44198

An Improper Check for Unusual or Exceptional Conditions vulnerability in the SIP ALG of Juniper Networks Junos OS on SRX Series and MX Series allows an unauthenticated network-based attacker to cause an integrity impact in connected networks. If the SIP ALG is configured and a device receives a...

Input validation

An Improper Check for Unusual or Exceptional Conditions vulnerability in the SIP ALG of Juniper Networks Junos OS on SRX Series and MX Series allows an unauthenticated network-based attacker to cause an integrity impact in connected networks. If the SIP ALG is configured and a device receives a...

CVE-2023-44198 Junos OS: SRX Series and MX Series: SIP ALG doesn't drop specifically malformed retransmitted SIP packets

An Improper Check for Unusual or Exceptional Conditions vulnerability in the SIP ALG of Juniper Networks Junos OS on SRX Series and MX Series allows an unauthenticated network-based attacker to cause an integrity impact in connected networks. If the SIP ALG is configured and a device receives a...

CVE-2023-44198 Junos OS: SRX Series and MX Series: SIP ALG doesn't drop specifically malformed retransmitted SIP packets

An Improper Check for Unusual or Exceptional Conditions vulnerability in the SIP ALG of Juniper Networks Junos OS on SRX Series and MX Series allows an unauthenticated network-based attacker to cause an integrity impact in connected networks. If the SIP ALG is configured and a device receives a...

CVE-2023-44198

CVE-2023-44198 affects Juniper Networks Junos OS SIP ALG on SRX Series and MX Series. The vulnerability stems from an improper check for unusual or exceptional conditions, enabling an unauthenticated, network-based attacker to cause an integrity impact in connected networks. When SIP ALG is enabl...

Juniper Junos OS Vulnerability (JSA73164)

The version of Junos OS installed on the remote host is affected by a vulnerability as referenced in the JSA73164 advisory. - An Improper Check for Unusual or Exceptional Conditions vulnerability in the SIP ALG of Juniper Networks Junos OS on SRX Series and MX Series allows an unauthenticated...

Juniper Junos OS Vulnerability (JSA69513)

The version of Junos OS installed on the remote host is affected by a vulnerability as referenced in the JSA69513 advisory. - An Access of Uninitialized Pointer vulnerability in the SIP ALG of Juniper Networks Junos OS allows an unauthenticated network-based attacker to cause a Denial of Service...

K06323049: BIG-IP IPsec ALG vulnerability CVE-2022-29473

Security Advisory Description When an IPSec ALG profile is configured on a virtual server, undisclosed responses can cause the Traffic Management Microkernel TMM to terminate. CVE-2022-29473 Impact Traffic is disrupted while the TMM process restarts. This vulnerability allows an unauthenticated...

K44110411: BIG-IP SIP ALG vulnerability CVE-2022-23025

Security Advisory Description When a SIP ALG profile is configured on a virtual server, undisclosed requests can cause the Traffic Management Microkernel TMM to terminate. CVE-2022-23025 Impact Traffic is disrupted while the TMM process restarts. This vulnerability allows an unauthenticated remot...

K42830212: BIG-IP SIP ALG profile vulnerability CVE-2020-5926

Security Advisory Description A BIG-IP virtual server with a Session Initiation Protocol SIP ALG profile, parsing SIP messages that contain a multi-part MIME payload with certain boundary strings can cause TMM to free memory to the wrong cache.CVE-2020-5926 Impact This vulnerability leads to futu...

K57214415: NAT slipstream vulnerability

Security Advisory Description This vulnerability exploits the application layer gateway ALG mechanism of network address translations NATs, routers, and firewalls through modification of internal IP extractions for a client browser connection and therefore bypasses the browser's port restrictions...

K51539421: BIG-IP SIP ALG profile vulnerability CVE-2022-26370

Security Advisory Description When a Session Initiation Protocol SIP message routing framework MRF application layer gateway ALG profile is configured on a Message Routing virtual server, undisclosed requests can cause the Traffic Management Microkernel TMM to terminate. CVE-2022-26370 Impact...

SUSE CVE-2015-8970

crypto/algifskcipher.c in the Linux kernel before 4.4.2 does not verify that a setkey operation has been performed on an AFALG socket before an accept system call is processed, which allows local users to cause a denial of service NULL pointer dereference and system crash via a crafted applicatio...

SUSE CVE-2016-10147

crypto/mcryptd.c in the Linux kernel before 4.8.15 allows local users to cause a denial of service NULL pointer dereference and system crash by using an AFALG socket with an incompatible algorithm, as demonstrated by mcryptdmd5...

SUSE CVE-2017-18075

crypto/pcrypt.c in the Linux kernel before 4.14.13 mishandles freeing instances, allowing a local user able to access the AFALG-based AEAD interface CONFIGCRYPTOUSERAPIAEAD and pcrypt CONFIGCRYPTOPCRYPT to cause a denial of service kfree of an incorrect pointer or possibly have unspecified other...

CVE-2023-22416

A Buffer Overflow vulnerability in SIP ALG of Juniper Networks Junos OS allows a network-based, unauthenticated attacker to cause a Denial of Service DoS. On all MX Series and SRX Series platform with SIP ALG enabled, when a malformed SIP packet is received, the flow processing daemon flowd will...

CVE-2023-22408

An Improper Validation of Array Index vulnerability in the SIP ALG of Juniper Networks Junos OS on SRX 5000 Series allows a network-based, unauthenticated attacker to cause a Denial of Service DoS. When an attacker sends an SIP packets with a malformed SDP field then the SIP ALG can not process i...

CVE-2023-22412

An Improper Locking vulnerability in the SIP ALG of Juniper Networks Junos OS on MX Series with MS-MPC or MS-MIC card and SRX Series allows an unauthenticated, network-based attacker to cause a flow processing daemon flowd crash and thereby a Denial of Service DoS. Continued receipt of these...

CVE-2023-22394

An Improper Handling of Unexpected Data Type vulnerability in the handling of SIP calls in Juniper Networks Junos OS on SRX Series and MX Series platforms allows an attacker to cause a memory leak leading to Denial of Services DoS. This issue occurs on all MX Series platforms with MS-MPC or MS-MI...