https://community.cisco.com/t5/network-security/predictable-tcp-initial-sequence-numbers-vulnerability/m-p/4916575#M1103974 <P>Hello Experts,&nbsp;</P><P>Any idea on how to address the subject vulnerability is cisco routers, where I have observed the routers with latest recommended software were also affected.</P> Sat, 02 Sep 2023 17:10:46 GMT Learner09 2023-09-02T17:10:46Z https://community.cisco.com/t5/network-security/predictable-tcp-initial-sequence-numbers-vulnerability/m-p/4916575#M1103974 <P>Hello Experts,&nbsp;</P><P>Any idea on how to address the subject vulnerability is cisco routers, where I have observed the routers with latest recommended software were also affected.</P> Sat, 02 Sep 2023 17:10:46 GMT https://community.cisco.com/t5/network-security/predictable-tcp-initial-sequence-numbers-vulnerability/m-p/4916575#M1103974 Learner09 2023-09-02T17:10:46Z https://community.cisco.com/t5/network-security/predictable-tcp-initial-sequence-numbers-vulnerability/m-p/4916601#M1103978 <P>TCP sequence number randomization was supposed to have been addressed more than 20 years ago:</P><P><A href="https://www.cisco.com/c/en/us/support/docs/csa/cisco-sa-20010301-ios-tcp-isn-random.html" target="_blank">https://www.cisco.com/c/en/us/support/docs/csa/cisco-sa-20010301-ios-tcp-isn-random.html</A></P><P>If your findings show predictability, you might contact Cisco's PSIRT with your observations: <A href="mailto:psirt@cisco.com" target="_blank">psirt@cisco.com</A></P><P>&nbsp;</P> Sat, 02 Sep 2023 21:31:50 GMT https://community.cisco.com/t5/network-security/predictable-tcp-initial-sequence-numbers-vulnerability/m-p/4916601#M1103978 Ramblin Tech 2023-09-02T21:31:50Z