USN-4616-1: AccountsService vulnerabilities
03 November 2020
Several security issues were fixed in AccountsService.
- accountsservice - query and manipulate user account information
Kevin Backhouse discovered that AccountsService incorrectly dropped
privileges. A local user could possibly use this issue to cause
AccountsService to crash or hang, resulting in a denial of service.
Kevin Backhouse discovered that AccountsService incorrectly handled reading
.pam_environment files. A local user could possibly use this issue to cause
AccountsService to crash or hang, resulting in a denial of service. This
issue only affected Ubuntu 20.04 LTS and Ubuntu 20.10. (CVE-2020-16127)
Matthias Gerstner discovered that AccountsService incorrectly handled
certain path checks. A local attacker could possibly use this issue to
read arbitrary files. This issue only affected Ubuntu 16.04 LTS and Ubuntu
18.04 LTS. (CVE-2018-14036)
The problem can be corrected by updating your system to the following package versions:
After a standard system update you need to reboot your computer to make
all the necessary changes.
- USN-4616-2: accountsservice, libpam-pin, libaccountsservice-dev, gir1.2-accountsservice-1.0, libaccountsservice0, libaccountsservice-doc