PublicDateAtUSN: 2021-02-15 17:15:00 UTC
Candidate: CVE-2021-27219
PublicDate: 2021-02-15 17:15:00 UTC
References:
 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-27219
 https://ubuntu.com/security/notices/USN-4759-1
Description:
 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.
Ubuntu-Description:
Notes:
 mdeslaur> see gnome bug for multiple regression fixes solved in 2.66.7
 mdeslaur> Upstream fixed this in 2.67 by adding a new g_memdup2() function
 mdeslaur> and deprecating g_memdup(). For the 2.66 stable release, they
 mdeslaur> added g_memdup2(), but in a private manner so that internal uses
 mdeslaur> of g_memdup() could be switched, but this won't fix external
 mdeslaur> applications.
Mitigation:
Bugs:
 https://gitlab.gnome.org/GNOME/glib/-/issues/2319
 http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=982778
 https://gitlab.gnome.org/GNOME/glib/-/issues/2323 (regression)
Priority: medium
Discovered-by: Kevin Backhouse
Assigned-to: mdeslaur
CVSS:
 nvd: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H [7.5 HIGH]


Patches_glib2.0:
 upstream: https://gitlab.gnome.org/GNOME/glib/-/merge_requests/1926 (master)
 upstream: https://gitlab.gnome.org/GNOME/glib/-/merge_requests/1927 (2.66)
 upstream: https://gitlab.gnome.org/GNOME/glib/-/commit/e8fe1d51fe07f506211680c76145eea737f4bf30 (2.66)
 upstream: https://gitlab.gnome.org/GNOME/glib/-/merge_requests/1933 (2.66 regression)
 upstream: https://gitlab.gnome.org/GNOME/glib/-/commit/00b181fa84f2d836f7f4401c0cd08f38e5b39167 (2.66 regression)
 upstream: https://gitlab.gnome.org/GNOME/glib/-/merge_requests/1943 (2.66 regression #2)
 upstream: https://gitlab.gnome.org/GNOME/glib/-/commit/b34d68b672c35042b7d7334590e1e0cd653f3826 (2.66 regression #2)
upstream_glib2.0: released (2.66.6-1, 2.67.3)
precise/esm_glib2.0: ignored (end of ESM support, was needs-triage)
trusty_glib2.0: ignored (out of standard support)
trusty/esm_glib2.0: needs-triage
xenial_glib2.0: released (2.48.2-0ubuntu4.7)
esm-infra/xenial_glib2.0: released (2.48.2-0ubuntu4.7)
bionic_glib2.0: released (2.56.4-0ubuntu0.18.04.7)
focal_glib2.0: released (2.64.6-1~ubuntu20.04.2)
groovy_glib2.0: released (2.66.1-2ubuntu0.1)
hirsute_glib2.0: not-affected (2.67.5-2)
impish_glib2.0: not-affected (2.67.5-2)
jammy_glib2.0: not-affected (2.67.5-2)
devel_glib2.0: not-affected (2.67.5-2)