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CVE-2017-8779

Published: 4 May 2017

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.

Notes

AuthorNote
mdeslaur
patch used by Debian in 0.2.3-0.6 isn't the correct one and
the reproducer still works against rpcbind

Priority

Medium

Cvss 3 Severity Score

7.5

Score breakdown

Status

Package Release Status
rpcbind
Launchpad, Ubuntu, Debian
hirsute Not vulnerable
(1.2.5-9)
xenial
Released (0.2.3-0.2ubuntu0.16.04.1+esm1)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
kinetic Not vulnerable
(1.2.5-9)
lunar Not vulnerable
(1.2.5-9)
artful Ignored
(end of life)
bionic
Released (0.2.3-0.6ubuntu0.18.04.2)
cosmic Ignored
(end of life)
disco Not vulnerable
(1.2.5-0.3)
eoan Not vulnerable
(1.2.5-0.3build1)
focal Not vulnerable
(1.2.5-8)
groovy Not vulnerable
(1.2.5-9)
impish Not vulnerable
(1.2.5-9)
jammy Not vulnerable
(1.2.5-9)
precise Ignored
(end of life)
trusty
Released (0.2.1-2ubuntu2.2+esm1)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
upstream Needs triage

yakkety Ignored
(end of life)
zesty Ignored
(end of life)
mantic Not vulnerable
(1.2.5-9)
Patches:
upstream: https://git.linux-nfs.org/?p=steved/rpcbind.git;a=commit;h=7ea36eeece56b59f98e469934e4c20b4da043346
libtirpc
Launchpad, Ubuntu, Debian
hirsute Not vulnerable
(0.2.5-1.2)
kinetic Not vulnerable
(0.2.5-1.2)
lunar Not vulnerable
(0.2.5-1.2)
artful Not vulnerable
(0.2.5-1.2)
bionic Not vulnerable
(0.2.5-1.2)
cosmic Not vulnerable
(0.2.5-1.2)
disco Not vulnerable
(0.2.5-1.2)
eoan Not vulnerable
(0.2.5-1.2)
focal Not vulnerable
(0.2.5-1.2)
groovy Not vulnerable
(0.2.5-1.2)
impish Not vulnerable
(0.2.5-1.2)
jammy Not vulnerable
(0.2.5-1.2)
precise Ignored
(end of life)
trusty
Released (0.2.2-5ubuntu2.1)
upstream
Released (0.2.5-1.2)
xenial
Released (0.2.5-1ubuntu0.1)
yakkety Ignored
(end of life)
zesty Ignored
(end of life)
mantic Not vulnerable
(0.2.5-1.2)
ntirpc
Launchpad, Ubuntu, Debian
hirsute Not vulnerable
(1.6.1-1)
xenial Needed

kinetic Not vulnerable
(1.6.1-1)
lunar Not vulnerable
(1.6.1-1)
artful Ignored
(end of life)
bionic Not vulnerable
(1.6.1-1)
cosmic Not vulnerable
(1.6.1-1)
disco Not vulnerable
(1.6.1-1)
eoan Not vulnerable
(1.6.1-1)
focal Not vulnerable
(1.6.1-1)
groovy Not vulnerable
(1.6.1-1)
impish Not vulnerable
(1.6.1-1)
jammy Not vulnerable
(1.6.1-1)
precise Does not exist

trusty Does not exist

upstream
Released (1.4.4-1)
yakkety Ignored
(end of life)
zesty Ignored
(end of life)
mantic Not vulnerable
(1.6.1-1)

Severity score breakdown

Parameter Value
Base score 7.5
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H