CVE-2017-8779

Description

rpcbind through 0.2.4, LIBTIRPC through 1.0.1 and 1.0.2-rc through 1.0.2-rc3, and NTIRPC through 1.4.3 do not consider the maximum RPC data size during memory allocation for XDR strings, which allows remote attackers to cause a denial of service (memory consumption with no subsequent free) via a crafted UDP packet to port 111, aka rpcbomb.

How to fix CVE-2017-8779

To remediate CVE-2017-8779, upgrade the affected package to a fixed version below.

—upgrade to 0.2.4-r0 or later
—upgrade to 0.2.2-5+deb7u1 or later
—upgrade to 0.2.5-1.2 or later
—upgrade to 0.2.5-1+deb8u1 or later
—upgrade to 1.4.4-1 or later
—upgrade to 0.2.3-0.6 or later
—upgrade to 0.2.0-8+deb7u2 or later
—upgrade to 0.2.1-6+deb8u2 or later

Is CVE-2017-8779 being exploited?

Likely — EPSS is 81.4%, placing CVE-2017-8779 in the top tier of vulnerabilities by exploitation probability. Prioritise patching.

Affected packages (8)

from 0, < 0.2.4-r0
from 0, < 0.2.2-5+deb7u1
from 0, < 0.2.5-1.2
from 0, < 0.2.5-1+deb8u1
from 0, < 1.4.4-1
from 0, < 0.2.3-0.6
from 0, < 0.2.0-8+deb7u2
from 0, < 0.2.1-6+deb8u2

CVSS scores

Source	Version	Severity	Vector
osv	CVSS 3.1	HIGH7.5	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H