CVE-2012-2744

kernel: netfilter: null pointer dereference in nf_ct_frag6_reasm()

Severity Score

7.5

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

net/ipv6/netfilter/nf_conntrack_reasm.c in the Linux kernel before 2.6.34, when the nf_conntrack_ipv6 module is enabled, allows remote attackers to cause a denial of service (NULL pointer dereference and system crash) via certain types of fragmented IPv6 packets.

net/ipv6/netfilter/nf_conntrack_reasm.c en el kernel de Linux anterior a v2.6.34, cuando el módulo nf_conntrack_ipv6 está habilitado, permite a atacantes remotos causar una denegación de servicio (referencia de puntero a NULL y caída del sistema) mediante ciertos tipos de paquetes IPv6 fragmentados.

The kernel packages contain the Linux kernel, the core of any Linux operating system. This update fixes the following security issue: A NULL pointer dereference flaw was found in the nf_ct_frag6_reasm() function in the Linux kernel's netfilter IPv6 connection tracking implementation. A remote attacker could use this flaw to send specially-crafted packets to a target system that is using IPv6 and also has the nf_conntrack_ipv6 kernel module loaded, causing it to crash.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

None

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2012-05-14 CVE Reserved
2012-07-10 CVE Published
2024-08-06 CVE Updated
2025-03-30 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-476: NULL Pointer Dereference

CAPEC

References (10)

URL	Tag	Source
http://ftp.osuosl.org/pub/linux/kernel/v2.6/ChangeLog-2.6.34	X_refsource_confirm
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=9e2dcf72023d1447f09c47d77c99b0c49659e5ce	X_refsource_confirm
http://secunia.com/advisories/49928	Third Party Advisory
http://www.securityfocus.com/bid/54367	Vdb Entry
http://www.securitytracker.com/id?1027235	Vdb Entry

URL	Date	SRC

URL	Date	SRC
https://github.com/torvalds/linux/commit/9e2dcf72023d1447f09c47d77c99b0c49659e5ce	2023-02-13

URL	Date	SRC
http://rhn.redhat.com/errata/RHSA-2012-1064.html	2023-02-13
http://rhn.redhat.com/errata/RHSA-2012-1148.html	2023-02-13
https://bugzilla.redhat.com/show_bug.cgi?id=833402	2012-08-07
https://access.redhat.com/security/cve/CVE-2012-2744	2012-08-07

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				<= 2.6.33.20 Search vendor "Linux" for product "Linux Kernel" and version " <= 2.6.33.20"		-		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				2.6.33 Search vendor "Linux" for product "Linux Kernel" and version "2.6.33"		-		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				2.6.33.1 Search vendor "Linux" for product "Linux Kernel" and version "2.6.33.1"		-		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				2.6.33.2 Search vendor "Linux" for product "Linux Kernel" and version "2.6.33.2"		-		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				2.6.33.3 Search vendor "Linux" for product "Linux Kernel" and version "2.6.33.3"		-		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				2.6.33.4 Search vendor "Linux" for product "Linux Kernel" and version "2.6.33.4"		-		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				2.6.33.5 Search vendor "Linux" for product "Linux Kernel" and version "2.6.33.5"		-		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				2.6.33.6 Search vendor "Linux" for product "Linux Kernel" and version "2.6.33.6"		-		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				2.6.33.7 Search vendor "Linux" for product "Linux Kernel" and version "2.6.33.7"		-		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				2.6.33.8 Search vendor "Linux" for product "Linux Kernel" and version "2.6.33.8"		-		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				2.6.33.9 Search vendor "Linux" for product "Linux Kernel" and version "2.6.33.9"		-		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				2.6.33.10 Search vendor "Linux" for product "Linux Kernel" and version "2.6.33.10"		-		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				2.6.33.11 Search vendor "Linux" for product "Linux Kernel" and version "2.6.33.11"		-		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				2.6.33.12 Search vendor "Linux" for product "Linux Kernel" and version "2.6.33.12"		-		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				2.6.33.13 Search vendor "Linux" for product "Linux Kernel" and version "2.6.33.13"		-		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				2.6.33.14 Search vendor "Linux" for product "Linux Kernel" and version "2.6.33.14"		-		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				2.6.33.15 Search vendor "Linux" for product "Linux Kernel" and version "2.6.33.15"		-		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				2.6.33.16 Search vendor "Linux" for product "Linux Kernel" and version "2.6.33.16"		-		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				2.6.33.17 Search vendor "Linux" for product "Linux Kernel" and version "2.6.33.17"		-		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				2.6.33.18 Search vendor "Linux" for product "Linux Kernel" and version "2.6.33.18"		-		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				2.6.33.19 Search vendor "Linux" for product "Linux Kernel" and version "2.6.33.19"		-		Affected