CVE-2002-2438

Exp

TCP firewalls could be circumvented by sending a SYN Packets with other flags (like e.g. RST flag) set, which was not correctly discarded by the Linux TCP stack after firewalling.

Published: 2021-05-18 Last update: 2024-11-20 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2002-2438 is rated High Exploit Risk (71.5/100): CVSS High severity, with medium exploitation likelihood (EPSS 3.74%). 1 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2002-2438

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2002-2438

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 8.19% 3.74% -4.44%
2 2026-05-20 6.20% 8.19% +1.99%
3 2025-12-04 — 6.20% —

Full EPSS history (14 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2002-2438

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 3.6 [email protected]
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:N/I:N/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2002-2438

OS Trackers for CVE-2002-2438

vendor priority summary link
redhat — — https://access.redhat.com/security/cve/CVE-2002-2438
ubuntu low CVE-2002-2438 low priority: Ubuntu including 13 source packages (linux, linux-armadaxp, …), 78 status rows across 6 suites (hardy, lucid, natty, oneiric, precise, upstream): DNE 38, not-affected 24, ignored 15, released 1. https://ubuntu.com/security/CVE-2002-2438

Affected software / configurations for CVE-2002-2438

Vendor Product Version Raw CPE
linux linux_kernel < 2.4.20 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

References for CVE-2002-2438

URL Tags
http://www.openwall.com/lists/oss-security/2012/02/03/7 Mailing List Patch Third Party Advisory
http://www.openwall.com/lists/oss-security/2012/05/29/8 Mailing List Patch Third Party Advisory
http://www.openwall.com/lists/oss-security/2012/05/30/11 Exploit Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2012/05/30/12 Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2012/05/30/13 Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2012/05/30/2 Mailing List Patch Third Party Advisory
http://www.openwall.com/lists/oss-security/2012/05/30/4 Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2012/05/30/8 Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2012/05/30/9 Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2012/05/31/3 Mailing List Patch Third Party Advisory
http://www.openwall.com/lists/oss-security/2014/02/12/8 Mailing List Third Party Advisory
https://bugzilla.suse.com/show_bug.cgi?id=744994%2C
https://security.netapp.com/advisory/ntap-20210727-0003/
https://www.kb.cert.org/vuls/id/464113 Third Party Advisory US Government Resource
https://www.kb.cert.org/vuls/id/464113%2C
https://www.openwall.com/lists/oss-security/2012/02/03/7 Mailing List Patch Third Party Advisory
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