==========================================================================
Ubuntu Security Notice USN-4502-1
September 16, 2020

ruby-websocket-extensions vulnerability
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

– Ubuntu 20.04 LTS
– Ubuntu 18.04 LTS
– Ubuntu 16.04 LTS

Summary:

websocket-extensions could be made to exhaust the server’s capacity to
process incoming requests if it received specially crafted requests.

Software Description:
– ruby-websocket-extensions: Generic extension manager for WebSocket
connections

Details:

It was discovered that websocket-extensions does not properly parse
special headers. A remote attacker could use this issue to cause regex
backtracking, resulting in a denial of service. (CVE-2020-7663)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 20.04 LTS:
ruby-websocket-extensions 0.1.2-1+deb9u1build0.20.04.1

Ubuntu 18.04 LTS:
ruby-websocket-extensions 0.1.2-1+deb9u1build0.18.04.1

Ubuntu 16.04 LTS:
ruby-websocket-extensions 0.1.2-1+deb9u1build0.16.04.1

In general, a standard system update will make all the necessary changes.

References:
https://usn.ubuntu.com/4502-1
CVE-2020-7663

Package Information:

https://launchpad.net/ubuntu/+source/ruby-websocket-extensions/0.1.2-1+deb9u1build0.20.04.1

https://launchpad.net/ubuntu/+source/ruby-websocket-extensions/0.1.2-1+deb9u1build0.18.04.1

https://launchpad.net/ubuntu/+source/ruby-websocket-extensions/0.1.2-1+deb9u1build0.16.04.1

—–BEGIN PGP SIGNATURE—–

iQIzBAEBCgAdFiEE7MowLJorxPNkyBZZW+PTAFZKyRgFAl9iFzcACgkQW+PTAFZK
yRjWvhAAjrOlPIACDalGIYGb7viK1Msesmzars4G93fnoMELmij6n7zKnnp17zeO
3XsDplvsMJYiL2NdeT0YAZE6wu8pWbLybYddqBQvgADAaC/FX66HYs8MbCkY1qkE
FYfODWmEXwDwKiXJeG7wlLD0YZArQvvkdNJTB6enkhE0p8SQrxjnay9L0tpRBa6k
V+HXJLuZNSiPXuggY/xsPrFpvrbKCCjupzLUhr8SqwaQyMS+wljdHhem6fezB1Ix
CpCQytUxSrgd6FZMqZrQhA9Sri4Y7weYcKDwsDY4W9af/eswf9AaACQijvJcS3oO
eTmceNtgTRlxEdbnbifVGHb6iMTGREtwL2WlM7gqJNluDmD+RGqo3yovgjtaujJd
tJXx8+esyRokW3+xcjzIBDS+ojNl0VspWakCS+DcSglo4RMB94PYscTCBGrQlnWC
5mfl+t5VCby1zujve0G7QJmoU3kbkLdYqG3niKUPfns9GB/X1MVZb+3S9MAEJ8VJ
r9nnQGtWMGKgn02iLEepxm5xuyS1Ea6nYSDAf+wNF+j/mhDd2FaHbcolVlejLpkc
ONjmaoG5ciVZseo3XBtJ8Hcd2eqLpPdd6UGqSeTax4Cn3238GUZ262yPX0Dd/A9+
ZN3DygzIbhCJvozfMOlUNHOkIvAXCsSxCIoY3L3MCeanwnaSslk=
=W7jv
—–END PGP SIGNATURE—–
—