CVE-2017-8779

2017-05-0400:00:00

ubuntu.com

7.5 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

7.8 High

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

COMPLETE

AV:N/AC:L/Au:N/C:N/I:N/A:C

0.551 Medium

EPSS

Percentile

97.6%

JSON

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.

Bugs

Notes

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

OSVersionArchitecturePackageVersionFilename
ubuntu14.04noarchlibtirpc< 0.2.2-5ubuntu2.1UNKNOWN
ubuntu16.04noarchlibtirpc< 0.2.5-1ubuntu0.1UNKNOWN
ubuntu16.04noarchntirpc< anyUNKNOWN
ubuntu18.04noarchrpcbind< 0.2.3-0.6ubuntu0.18.04.2UNKNOWN
ubuntu14.04noarchrpcbind< 0.2.1-2ubuntu2.2+esm1) Available with Ubuntu Pro or Ubuntu Pro (Infra-onlyUNKNOWN
ubuntu16.04noarchrpcbind< 0.2.3-0.2ubuntu0.16.04.1+esm1) Available with Ubuntu Pro or Ubuntu Pro (Infra-onlyUNKNOWN

OS	Version	Architecture	Package	Version	Filename
ubuntu	14.04	noarch	libtirpc	< 0.2.2-5ubuntu2.1	UNKNOWN
ubuntu	16.04	noarch	libtirpc	< 0.2.5-1ubuntu0.1	UNKNOWN
ubuntu	16.04	noarch	ntirpc	< any	UNKNOWN
ubuntu	18.04	noarch	rpcbind	< 0.2.3-0.6ubuntu0.18.04.2	UNKNOWN
ubuntu	14.04	noarch	rpcbind	< 0.2.1-2ubuntu2.2+esm1) Available with Ubuntu Pro or Ubuntu Pro (Infra-only	UNKNOWN
ubuntu	16.04	noarch	rpcbind	< 0.2.3-0.2ubuntu0.16.04.1+esm1) Available with Ubuntu Pro or Ubuntu Pro (Infra-only	UNKNOWN