CVE-2021-27219

Publication date 15 February 2021

Last updated 24 July 2024

Ubuntu priority

Cvss 3 Severity Score

An issue was discovered in GNOME GLib before 2.66.6 and 2.67.x before 2.67.3. The function g_bytes_new has an integer overflow on 64-bit platforms due to an implicit cast from 64 bits to 32 bits. The overflow could potentially lead to memory corruption.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
glib2.0	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	Fixed 2.66.1-2ubuntu0.1
	20.04 LTS focal	Fixed 2.64.6-1~ubuntu20.04.2
	18.04 LTS bionic	Fixed 2.56.4-0ubuntu0.18.04.7
	16.04 LTS xenial	Fixed 2.48.2-0ubuntu4.7
	14.04 LTS trusty	Ignored end of ESM support, was needed

Notes

mdeslaur

see gnome bug for multiple regression fixes solved in 2.66.7 Upstream fixed this in 2.67 by adding a new g_memdup2() function and deprecating g_memdup(). For the 2.66 stable release, they added g_memdup2(), but in a private manner so that internal uses of g_memdup() could be switched, but this won't fix external applications.

Patch details

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

Package	Patch details
glib2.0	Upstream: https://gitlab.gnome.org/GNOME/glib/-/merge_requests/1926 Upstream: https://gitlab.gnome.org/GNOME/glib/-/merge_requests/1927 Upstream: e8fe1d5 Upstream: https://gitlab.gnome.org/GNOME/glib/-/merge_requests/1933 Upstream: 00b181f Upstream: https://gitlab.gnome.org/GNOME/glib/-/merge_requests/1943 Upstream: b34d68b

Severity score breakdown

Parameter	Value
Base score	7.5 · High
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	None
Integrity impact	None
Availability impact	High
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H