01 Record

CVE-2020-25705

A flaw in ICMP packets in the Linux kernel may allow an attacker to quickly scan open UDP ports. This flaw allows an off-path remote attacker to effectively bypass source port UDP randomization.

UnratedPUBLISHEDCNA: redhat

CNA base scoreUnratedNo CNA CVSS vector

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02 Description

A flaw in ICMP packets in the Linux kernel may allow an attacker to quickly scan open UDP ports. This flaw allows an off-path remote attacker to effectively bypass source port UDP randomization.

03 Exploitation and scoring

Exploitation: Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
SSVC decision: Not assessed by CISA
EPSS probability: 6.69% probability of exploitation activity in the next 30 days.
EPSS percentile: Equal to or higher than the score of 93.8% of scored records. A rank, not a probability.
NVD base score: 7.4 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
NVD analysis status: Modified. NVD last modified this record on 2026-06-17.
Red Hat severity: Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published

2020-11-17 01:16Z5 YR AGO

Last updated

2024-08-04 15:40Z2 YR AGO

Reserved

2020-09-16

Assigning CNA

redhat

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

CWE-330Use of Insufficiently Random ValuesClass

Data version

5.1

Document digest

2860728937a97710d865e8ee4405bdb2142e2025afeda0842a7ef6b641c44bb4

05 Affected products

VendorProductVersionsPlatforms

n/aSiemens Lunux Based ProductsRUGGEDCOM RM1224: All versions between v5.0 and v6.4, SCALANCE M-800: All versions between v5.0 and v6.4, SCALANCE S615: All versions between v5.0 and v6.4, SCALANCE SC-600: All versions prior to v2.1.3, SCALANCE W1750D: v8.3.0.1, v8.6.0, and v8.7.0, SIMATIC Cloud Connect 7: All versions, SIMATIC MV500 Family: All versions, SIMATIC NET CP 1243-1 (incl. SIPLUS variants): Versions 3.1.39 and later, SIMATIC NET CP 1243-7 LTE EU: Versions 3.1.39 and later, SIMATIC NET CP 1243-7 LTE US: Versions 3.1.39 and later, SIMATIC NET CP 1243-7: Versions 3.1.39 and later, SIMATIC NET CP 1243-8 IRC: Versions 3.1.39 and later, SIMATIC NET CP 1542SP-1 IRC (incl. SIPLUS variants): Versions 2.0 and later, SIMATIC NET CP 1542SP-1: Versions 2.0 and later, SIMATIC NET CP 1543-1 (incl. SIPLUS variants): Versions 2.2 and later, SIMATIC NET CP 1543SP-1 (incl SIPLUS variants): Versions 2.0 and later, SIMATIC NET CP 1545-1: All versions, SINEMA Remote Connect Server: All versions prior to v3.0 SP1, TIM 1531 IRC (incl. SI ...[truncated*]—

06 References

us-cert.cisa.govhttps://us-cert.cisa.gov/ics/advisories/icsa-21-131-03x_refsource_MISC

07 Fixed in

AlmaLinux 8

kernel-tools-libs-devel
Fixed in 4.18.0-240.15.1.el8_3

CloudLinux 8

kernel-tools-libs-devel
Fixed in 4.18.0-240.15.1.el8_3

Derived from AlmaLinux 8. Partial coverage: only packages taken from AlmaLinux 8 are listed.

Debian 12

linux
Fixed in 5.9.6-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 13

linux
Fixed in 5.9.6-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 14

linux
Fixed in 5.9.6-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.