High-Severity Flaws in Juniper Junos OS Affect Enterprise Networking Devices

Multiple high-severity security flaws have been disclosed as
affecting Juniper Networks devices, some of which could be
exploited to achieve code execution.

Chief among them is a remote pre-authenticated PHP archive file
deserialization vulnerability (CVE-2022-22241, CVSS score: 8.1) in
the J-Web component of Junos OS, according to Octagon Networks
researcher Paulos Yibelo.

“This vulnerability can be exploited by an unauthenticated
remote attacker to get remote phar files deserialized, leading to
arbitrary file write, which leads to a remote code execution
(RCE),” Yibelo said^[1]
in a report shared with The Hacker News.

Also identified are five other issues, which are listed as
follow –

• CVE-2022-22242 (CVSS score: 6.1) – A
  pre-authenticated reflected XSS^[2]
  on the error page (“error.php”), allowing a remote adversary to
  siphon Junos OS admin session and chained with other flaws that
  require authentication.

• CVE-2022-22243 (CVSS score: 4.3) &
  CVE-2022-22244 (CVSS score: 5.3) – Two XPATH injection^[3]
  flaws that exploited by a remote authenticated attacker to steal
  and manipulate Junos OS admin sessions

• CVE-2022-22245 (CVSS score: 4.3) – A path
  traversal flaw that could permit a remote authenticated attacker to
  upload PHP files to any arbitrary location, in a manner similar to
  that of the recently disclosed RARlab UnRAR flaw (CVE-2022-30333^[4]), and

• CVE-2022-22246 (CVSS score: 7.5) – A local
  file inclusion vulnerability that could be weaponized to run
  untrusted PHP code.

“This [CVE-2022-22246] allows an attacker the ability to include
any PHP file stored on the server,” Yibelo noted. “If this
vulnerability is exploited alongside the file upload vulnerability,
it can lead to remote code execution.”

Users of Juniper Networks firewalls, routers, and switches are
recommended to apply
the latest software patch^[5]
available for Junos OS to mitigate aforementioned threats.

“One or more of these issues could lead to unauthorized local
file access, cross-site scripting attacks, path injection and
traversal, or local file inclusion,” Juniper Networks disclosed^[6]
in an advisory released on October 12, 2022.

The issues have been addressed in Junos OS versions 19.1R3-S9,
19.2R3-S6, 19.3R3-S7, 19.4R3-S9, 20.1R3-S5, 20.2R3-S5, 20.3R3-S5,
20.4R3-S4, 21.1R3-S2, 21.3R3, 21.4R3, 22.1R2, 22.2R1, and
later.