SB2023011182 - Out-of-bounds write in Juniper Junos OS

Security Bulletin ID SB2023011182

CSH Severity

Medium

Patch available

YES

Number of vulnerabilities 1

Exploitation vector Remote access

Highest impact Denial of service

Breakdown by Severity

Low
Medium
High
Critical

Description

This security bulletin contains information about 1 vulnerability.

1) Out-of-bounds write (CVE-ID: CVE-2023-22411)

CWE-ID: CWE-787 - Out-of-bounds write

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green

The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to out-of-bounds write error in Flow Processing Daemon (flowd). A remote non-authenticated attacker can cause Denial of Service (DoS).

On SRX Series devices using Unified Policies with IPv6, when a specific IPv6 packet goes through a dynamic-application filter which will generate an ICMP deny message, the flowd core is observed and the PFE is restarted.

Remediation

Install update from vendor's website.

References

https://supportportal.juniper.net/s/article/2023-01-Security-Bulletin-Junos-OS-SRX-Series-The-flowd-daemon-will-crash-when-Unified-Policies-are-used-with-IPv6-and-certain-dynamic-applications-are-rejected-by-the-device-CVE-2023-22411