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

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

Priority

Cvss 3 Severity Score

7.5

Score breakdown

Status

Package	Release	Status
libtirpc Launchpad, Ubuntu, Debian	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)
	hirsute	Not vulnerable (0.2.5-1.2)
	impish	Not vulnerable (0.2.5-1.2)
	jammy	Not vulnerable (0.2.5-1.2)
	kinetic	Not vulnerable (0.2.5-1.2)
	lunar	Not vulnerable (0.2.5-1.2)
	mantic	Not vulnerable (0.2.5-1.2)
	noble	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)
ntirpc Launchpad, Ubuntu, Debian	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)
	hirsute	Not vulnerable (1.6.1-1)
	impish	Not vulnerable (1.6.1-1)
	jammy	Not vulnerable (1.6.1-1)
	kinetic	Not vulnerable (1.6.1-1)
	lunar	Not vulnerable (1.6.1-1)
	mantic	Not vulnerable (1.6.1-1)
	noble	Not vulnerable (1.6.1-1)
	precise	Does not exist
	trusty	Does not exist
	upstream	Released (1.4.4-1)
	xenial	Needed
	yakkety	Ignored (end of life)
	zesty	Ignored (end of life)
rpcbind Launchpad, Ubuntu, Debian	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)
	hirsute	Not vulnerable (1.2.5-9)
	impish	Not vulnerable (1.2.5-9)
	jammy	Not vulnerable (1.2.5-9)
	kinetic	Not vulnerable (1.2.5-9)
	lunar	Not vulnerable (1.2.5-9)
	mantic	Not vulnerable (1.2.5-9)
	noble	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
	xenial	Released (0.2.3-0.2ubuntu0.16.04.1+esm1) Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
	yakkety	Ignored (end of life)
	zesty	Ignored (end of life)
	Patches: upstream: https://git.linux-nfs.org/?p=steved/rpcbind.git;a=commit;h=7ea36eeece56b59f98e469934e4c20b4da043346

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

References

Bugs

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