Home/CVE/The tcp_find_option function of the netfilter subsystem in Linux kernel 2.6, when using iptables and TCP options rules,
CVE

CVE-2004-0626

The tcp_find_option function of the netfilter subsystem in Linux kernel 2.6, when using iptables and TCP options rules,

The tcp_find_option function of the netfilter subsystem in Linux kernel 2.6, when using iptables and TCP options rules, allows remote attackers to cause a denial of service (CPU consumption by infinite loop) via a large option length that produces a negative integer after a casting operation to the char type.

MEDIUM · CVSS 5 EPSS 0.01738
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  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules8 YARA rules0
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Affected Products & Versions

4
conectiva linuxall versions
gentoo linuxall versions
linux kernelall versions
suse linuxall versions
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Sigma Hunt Rules

8
Exact rules name this CVE ID. Product rules name an affected product in their title. Related rules cover techniques used by actors who exploited this CVE. Showing the most relevant matches; the complete related set is on the full drill-down.
productcriticalLinux Reverse Shell Indicator
producthighCommunication To LocaltoNet Tunneling Service Initiated - Linux
producthighPotentially Suspicious Malware Callback Communication - Linux
producthighLinux Crypto Mining Pool Connections
producthighCommunication To Ngrok Tunneling Service - Linux
producthighLinux Crypto Mining Indicators
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Scoring & Timeline

5
MEDIUM · CVSS v2 (legacy) · cve@mitre.org
View on NVD
This CVE predates CVSS v3; the legacy v2 score is shown so triage still has a severity to work with.
v2 Vector
AV:N/AC:L/Au:N/C:N/I:N/A:P
Published to NVD06 Dec 2004 · 05:00 AM
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References & Sources

6
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://distro.conectiva.com.br/atualizacoes/?id=a&anuncio=000852PatchVendor Advisory
http://lwn.net/Articles/91964/PatchVendor Advisory
http://marc.info/?l=bugtraq&m=108861141304495&w=2
http://www.gentoo.org/security/en/glsa/glsa-200407-12.xmlPatchVendor Advisory
http://www.novell.com/linux/security/advisories/2004_20_kernel.html
https://exchange.xforce.ibmcloud.com/vulnerabilities/16554
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