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Vulnerability · Published Jan 12, 2024 · Assigned by juniper

CVE-2024-21606Junos OS: SRX Series: When "tcp-encap" is configured and specific packets are received flowd will crash

High 7.5

In plain English

A high-severity double free in Junos OS from Juniper Networks. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 46% of all known vulnerabilities).

Severity (CVSS 3.1)7.5High
Exploit odds (30 days)0.6%top 53.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

A Double Free vulnerability in the flow processing daemon (flowd) of Juniper Networks Junos OS on SRX Series allows a network-based, unauthenticated attacker to cause a Denial of Service (DoS). In a remote access VPN scenario, if a "tcp-encap-profile" is configured and a sequence of specific packets is received, a flowd crash and restart will be observed. This issue affects Juniper Networks Junos OS on SRX Series: * All versions earlier than 20.4R3-S8; * 21.2 versions earlier than 21.2R3-S6; * 21.3 versions earlier than 21.3R3-S5; * 21.4 versions earlier than 21.4R3-S5; * 22.1 versions earlier than 22.1R3-S3; * 22.2 versions earlier than 22.2R3-S3; * 22.3 versions earlier than 22.3R3-S1; * 22.4 versions earlier than 22.4R2-S2, 22.4R3.

Affected products (as reported)

VendorProductVersions
Juniper Networks Junos OS 0 – before 20.4R3-S821.2 – before 21.2R3-S621.3 – before 21.3R3-S521.4 – before 21.4R3-S522.1 – before 22.1R3-S322.2 – before 22.2R3-S322.3 – before 22.3R3-S122.4 – before 22.4R2-S2, 22.4R3

Weakness: CWE-415 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References