CVE-2021-31371 — Sensitive Information Exposure in Networks Junos OS

CWE-200 — Sensitive Information Exposure4 documents4 sources
Severity
5.3MEDIUMNVD
EPSS
0.2%
top 55.90%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
2
Juniper Networks Junos OSJuniper Junos
Timeline
PublishedOct 19
Latest updateMay 24

Description

Juniper Networks Junos OS uses the 128.0.0.0/2 subnet for internal communications between the RE and PFEs. It was discovered that packets utilizing these IP addresses may egress an QFX5000 Series switch, leaking configuration information such as heartbeats, kernel versions, etc. out to the Internet, leading to an information exposure vulnerability. This issue affects Juniper Networks Junos OS on QFX5110, QFX5120, QFX5200, QFX5210 Series, and QFX5100 with QFX 5e Series image installed: All versio…

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:NExploitability: 3.9 | Impact: 1.4

Affected Packages2 packages

▶CVEListV5juniper_networks/junos_osunspecified — 17.3R3-S12+12
▶NVDjuniper/junos17.2+12

🔴Vulnerability Details

2
GHSA
GHSA-c966-q9gj-wmw3: Juniper Networks Junos OS uses the 128↗2022-05-24
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CVEList
Junos OS: QFX5000 Series: Traffic from the network internal to the device (128.0.0.0) may be forwarded to egress interfaces.↗2021-10-19
▶

📋Vendor Advisories

1
Juniper
CVE-2021-31371: Juniper Networks Junos OS uses the 128.0.0.0/2 subnet for internal communications between the RE and PFEs. It was discovered that packets utilizing th↗2021-10-19
▶
CVE-2021-31371 — Sensitive Information Exposure | cvebase