The Vigil@nce team watches public vulnerabilities impacting your computers, and then offers security solutions, a vigilance database and tools to fix them.

Vulnerability of FreeBSD: denial of service via SegmentSmack

Synthesis of the vulnerability 

An attacker can generate a fatal error via TCP Reassembly of FreeBSD, in order to trigger a denial of service.
Vulnerable products: GAiA, SecurePlatform, CheckPoint Security Gateway, AsyncOS, Cisco Content SMA, Cisco ESA, Cisco WSA, FreeBSD, AIX, Junos OS, SRX-Series, Oracle Communications, pfSense.
Severity of this weakness: 3/4.
Creation date: 07/08/2018.
Références of this bulletin: 6387, cisco-sa-20180824-linux-tcp, cpujan2019, CVE-2018-6922, FreeBSD-SA-18:08.tcp, ibm10737709, JSA10876, SegmentSmack, sk134253, VIGILANCE-VUL-26922.

Description of the vulnerability 

An attacker can generate a fatal error via TCP Reassembly of FreeBSD, in order to trigger a denial of service.
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This computer threat alert impacts software or systems such as GAiA, SecurePlatform, CheckPoint Security Gateway, AsyncOS, Cisco Content SMA, Cisco ESA, Cisco WSA, FreeBSD, AIX, Junos OS, SRX-Series, Oracle Communications, pfSense.

Our Vigil@nce team determined that the severity of this weakness announce is important.

The trust level is of type confirmed by the editor, with an origin of internet client.

An attacker with a expert ability can exploit this computer weakness bulletin.

Solutions for this threat 

FreeBSD: patch for TCP Reassembly.
A patch is available:
  https://security.FreeBSD.org/patches/SA-18:08/tcp-10.patch
  https://security.FreeBSD.org/patches/SA-18:08/tcp-11.patch

AIX: solution for SegmentSmack.
The solution is indicated in information sources.

Check Point: solution for SegmentSmack.
The solution is indicated in information sources.

Cisco: solution for SegmentSmack.
The solution is indicated in information sources.

Juniper: solution for SegmentSmack.
The solution is indicated in information sources.

Oracle Communications: CPU of January 2019.
A Critical Patch Update is available:
  https://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.html

pfSense: version 2.4.4.
The version 2.4.4 is fixed:
  https://www.netgate.com/
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