CVE-2020-35512 — Use After Free in Dbus

CWE-416 — Use After Free8 documents7 sources
Severity
7.8HIGHNVD
EPSS
0.0%
top 90.33%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
1
Freedesktop Dbus
Timeline
PublishedFeb 15
Latest updateMay 24

Description

A use-after-free flaw was found in D-Bus Development branch <= 1.13.16, dbus-1.12.x stable branch <= 1.12.18, and dbus-1.10.x and older branches <= 1.10.30 when a system has multiple usernames sharing the same UID. When a set of policy rules references these usernames, D-Bus may free some memory in the heap, which is still used by data structures necessary for the other usernames sharing the UID, possibly leading to a crash or other undefined behaviors

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HExploitability: 1.8 | Impact: 5.9

Affected Packages2 packages

▶Debianfreedesktop/dbus< 1.12.20-1+3
▶NVDfreedesktop/dbus1.12.20

🔴Vulnerability Details

3
GHSA
GHSA-f5qm-fxvw-fwjg: A use-after-free flaw was found in D-Bus 1↗2022-05-24
▶
OSV
CVE-2020-35512: A use-after-free flaw was found in D-Bus Development branch <= 1↗2021-02-15
▶
CVEList
CVE-2020-35512: A use-after-free flaw was found in D-Bus Development branch <= 1↗2021-02-15
▶

📋Vendor Advisories

4
Ubuntu
DBus vulnerability↗2022-05-09
▶
Ubuntu
DBus vulnerability↗2022-01-20
▶
Red Hat
dbus: users with the same numeric UID could lead to use-after-free and undefined behaviour↗2020-06-30
▶
Debian
CVE-2020-35512: dbus - A use-after-free flaw was found in D-Bus Development branch <= 1.13.16, dbus-1.1...↗2020
▶
CVE-2020-35512 — Use After Free in Freedesktop Dbus | cvebase