In January 2018, a vulnerability was published affecting the operating system in ACOS 3.x and 4.x. This vulnerability is addressed in this document.
|Item #||Vulnerability ID||Score Source||Score||Summary|
|1||CVE-2017-18017||CVSS 3.0||9.8 Critical||kernel: netfilter: User-after-free in tcpmss_mangle_packet() in xt_TCPMSS.c|
The table below indicates releases of ACOS exposed to these vulnerabilities and ACOS releases that address them. ACOS release families not indicated below are unaffected by these vulnerabilities.
Customers using affected ACOS releases can overcome vulnerability exposures by updating to the indicated resolved release. If the table does not list a corresponding resolved or unaffected release, then no ACOS release update is currently available.
|Releases Affected||Releases Resolved or Unaffected|
4.1.2 – 4.1.2-P4
4.1.1 – 4.1.1-P8
4.1.100 – 4.1.100-P5
4.1.0 – 4.1.0-P11
3.2.2 – 3.2.2-P4
Software updates that address these vulnerabilities are or will be published at the following URL:
The following table shares brief descriptions of the vulnerabilities addressed in this document.
|Vulnerability ID||Vulnerability Description|
The tcpmss_mangle_packet function in net/netfilter/xt_TCPMSS.c in the Linux kernel before 4.11, and 4.9.x before 4.9.36, allows remote attackers to cause a denial of service (use-after-free and memory corruption) or possibly have unspecified other impact by leveraging the presence of xt_TCPMSS in an iptables action.
August 19, 2018
October 11, 2019
Added 4.1.100 release family.
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