CVE-2003-1013

The Q.931 dissector in Ethereal before 0.10.0, and Tethereal, allows remote attackers to cause a denial of service (crash) via a malformed Q.931, which triggers a null dereference.

Published: 2004-01-05 Last update: 2026-04-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2003-1013 is rated Moderate Risk (60.5/100): CVSS High severity, with medium exploitation likelihood (EPSS 4.46%). Review affected assets and schedule remediation.

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

Exploit prediction scoring system (EPSS) score for CVE-2003-1013

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 2025-03-30 4.79% 4.46% -0.34%
2 2025-03-29 4.46% 4.79% +0.34%
3 2025-03-17 — 4.46% —

Full EPSS history (9 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2003-1013

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-2003-1013

OS Trackers for CVE-2003-1013

vendor priority summary link
redhat low — https://access.redhat.com/security/cve/CVE-2003-1013

Affected software / configurations for CVE-2003-1013

Vendor Product Version Raw CPE
ethereal ethereal < 0.10.0 cpe:2.3:a:ethereal:ethereal:*:*:*:*:*:*:*:*

References for CVE-2003-1013

URL Tags
ftp://patches.sgi.com/support/free/security/advisories/20040103-01-U.asc Broken Link
ftp://patches.sgi.com/support/free/security/advisories/20040202-01-U.asc Broken Link
http://distro.conectiva.com.br/atualizacoes/?id=a&anuncio=000801 Broken Link
http://secunia.com/advisories/10531 Broken Link
http://secunia.com/advisories/10568 Broken Link
http://secunia.com/advisories/10570 Broken Link
http://www.debian.org/security/2003/dsa-407 Broken Link
http://www.ethereal.com/appnotes/enpa-sa-00012.html Broken Link Patch Vendor Advisory URL Repurposed
http://www.mandriva.com/security/advisories?name=MDKSA-2004:002 Third Party Advisory
http://www.redhat.com/support/errata/RHSA-2004-001.html Broken Link Patch Vendor Advisory
http://www.redhat.com/support/errata/RHSA-2004-002.html Broken Link
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10097 Broken Link
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A857 Broken Link
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