CVE-2016-9843

Publication date 23 May 2017

Last updated 24 July 2024

Ubuntu priority

Cvss 3 Severity Score

The crc32_big function in crc32.c in zlib 1.2.8 might allow context-dependent attackers to have unspecified impact via vectors involving big-endian CRC calculation.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
klibc	24.10 oracular	Needs evaluation
	24.04 LTS noble	Needs evaluation
	23.10 mantic	Not affected
	22.04 LTS jammy	Not affected
	20.04 LTS focal	Not affected
	18.04 LTS bionic	Not affected
	16.04 LTS xenial	Not affected
	14.04 LTS trusty	Not affected
rsync	24.10 oracular	Fixed 3.1.3-6
	24.04 LTS noble	Fixed 3.1.3-6
	23.10 mantic	Fixed 3.1.3-6
	23.04 lunar	Fixed 3.1.3-6
	22.10 kinetic	Fixed 3.1.3-6
	22.04 LTS jammy	Fixed 3.1.3-6
	21.10 impish	Fixed 3.1.3-6
	21.04 hirsute	Fixed 3.1.3-6
	20.10 groovy	Fixed 3.1.3-6
	20.04 LTS focal	Fixed 3.1.3-6
	19.10 eoan	Fixed 3.1.3-6
	19.04 disco	Fixed 3.1.3-6
	18.04 LTS bionic	Fixed 3.1.2-2.1ubuntu1.1
	16.04 LTS xenial	Fixed 3.1.1-3ubuntu1.3
	14.04 LTS trusty	Not affected
zlib	24.10 oracular	Not affected
	24.04 LTS noble	Not affected
	23.10 mantic	Not affected
	23.04 lunar	Not affected
	22.10 kinetic	Not affected
	22.04 LTS jammy	Not affected
	21.10 impish	Not affected
	21.04 hirsute	Not affected
	20.10 groovy	Not affected
	20.04 LTS focal	Not affected
	19.10 eoan	Not affected
	19.04 disco	Not affected
	18.10 cosmic	Not affected
	18.04 LTS bionic	Not affected
	17.10 artful	Not affected
	17.04 zesty	Ignored end of life
	16.10 yakkety	Ignored end of life
	16.04 LTS xenial	Fixed 1:1.2.8.dfsg-2ubuntu4.3
	14.04 LTS trusty	Ignored end of ESM support, was needed
	12.04 LTS precise	Ignored end of life

Notes

mdeslaur

since 3.1.3-7, rsync builds with the system zlib

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
zlib	Upstream: d1d5774

Severity score breakdown

Parameter	Value
Base score	9.8 · Critical
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	High
Integrity impact	High
Availability impact	High
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H