Multiple vulnerabilities in Linux kernel

1) Improper Initialization

EUVDB-ID: #VU42786

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2011-4087

CWE-ID: CWE-665 - Improper Initialization

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.

The br_parse_ip_options function in net/bridge/br_netfilter.c in the Linux kernel before 2.6.39 does not properly initialize a certain data structure, which allows remote attackers to cause a denial of service by leveraging connectivity to a network interface that uses an Ethernet bridge device.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: 2.6.0 - 2.6.38.8

CPE2.3

External links

https://ftp.osuosl.org/pub/linux/kernel/v2.6/ChangeLog-2.6.39
https://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f8e9881c2aef1e982e5abc25c046820cd0b7cf64
https://www.openwall.com/lists/oss-security/2011/10/28/14
https://github.com/torvalds/linux/commit/f8e9881c2aef1e982e5abc25c046820cd0b7cf64

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Out-of-bounds write

EUVDB-ID: #VU42790

Risk: High

CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2011-1180

CWE-ID: CWE-787 - Out-of-bounds write

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.

Multiple stack-based buffer overflows in the iriap_getvaluebyclass_indication function in net/irda/iriap.c in the Linux kernel before 2.6.39 allow remote attackers to cause a denial of service (memory corruption) or possibly have unspecified other impact by leveraging connectivity to an IrDA infrared network and sending a large integer value for a (1) name length or (2) attribute length.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: 2.6.0 - 2.6.38.8

CPE2.3

External links

https://ftp.osuosl.org/pub/linux/kernel/v2.6/ChangeLog-2.6.39
https://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=d370af0ef7951188daeb15bae75db7ba57c67846
https://www.openwall.com/lists/oss-security/2011/03/22/11
https://github.com/torvalds/linux/commit/d370af0ef7951188daeb15bae75db7ba57c67846

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

3) Input validation error

EUVDB-ID: #VU43041

Risk: Medium

CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2011-1182

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to manipulate or delete data.

kernel/signal.c in the Linux kernel before 2.6.39 allows local users to spoof the uid and pid of a signal sender via a sigqueueinfo system call.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: 2.6.0 - 2.6.38.8

CPE2.3

External links

https://ftp.osuosl.org/pub/linux/kernel/v2.6/ChangeLog-2.6.39
https://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=da48524eb20662618854bb3df2db01fc65f3070c
https://rhn.redhat.com/errata/RHSA-2011-0927.html
https://www.openwall.com/lists/oss-security/2011/03/23/2
https://bugzilla.redhat.com/show_bug.cgi?id=690028
https://github.com/torvalds/linux/commit/da48524eb20662618854bb3df2db01fc65f3070c

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

4) Resource management error

EUVDB-ID: #VU43042

Risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2011-2479

CWE-ID: CWE-399 - Resource Management Errors

Exploit availability: No

Description

The vulnerability allows a local authenticated user to perform a denial of service (DoS) attack.

The Linux kernel before 2.6.39 does not properly create transparent huge pages in response to a MAP_PRIVATE mmap system call on /dev/zero, which allows local users to cause a denial of service (system crash) via a crafted application.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: 2.6.0 - 2.6.38.8

CPE2.3

External links

https://ftp.osuosl.org/pub/linux/kernel/v2.6/ChangeLog-2.6.39
https://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=78f11a255749d09025f54d4e2df4fbcb031530e2
https://www.openwall.com/lists/oss-security/2011/06/20/14
https://bugzilla.redhat.com/show_bug.cgi?id=714761
https://github.com/torvalds/linux/commit/78f11a255749d09025f54d4e2df4fbcb031530e2

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

5) Buffer overflow

EUVDB-ID: #VU44033

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2011-3359

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.

The dma_rx function in drivers/net/wireless/b43/dma.c in the Linux kernel before 2.6.39 does not properly allocate receive buffers, which allows remote attackers to cause a denial of service (system crash) via a crafted frame.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: 2.6.0 - 2.6.38.8

CPE2.3

External links

https://ftp.osuosl.org/pub/linux/kernel/v2.6/ChangeLog-2.6.39
https://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=c85ce65ecac078ab1a1835c87c4a6319cf74660a
https://www.openwall.com/lists/oss-security/2011/09/14/2
https://bugzilla.redhat.com/show_bug.cgi?id=738202
https://github.com/torvalds/linux/commit/c85ce65ecac078ab1a1835c87c4a6319cf74660a

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

6) Input validation error

EUVDB-ID: #VU44034

Risk: Medium

CVSSv4.0: 4.9 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2011-3363

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.

The setup_cifs_sb function in fs/cifs/connect.c in the Linux kernel before 2.6.39 does not properly handle DFS referrals, which allows remote CIFS servers to cause a denial of service (system crash) by placing a referral at the root of a share.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: 2.6.0 - 2.6.38.8

CPE2.3

External links

https://ftp.osuosl.org/pub/linux/kernel/v2.6/ChangeLog-2.6.39
https://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=70945643722ffeac779d2529a348f99567fa5c33
https://www.openwall.com/lists/oss-security/2011/09/14/12
https://bugzilla.redhat.com/show_bug.cgi?id=738291
https://github.com/torvalds/linux/commit/70945643722ffeac779d2529a348f99567fa5c33

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

7) Permissions, Privileges, and Access Controls

EUVDB-ID: #VU44035

Risk: Medium

CVSSv4.0: 2.1 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2011-4080

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to gain access to sensitive information.

The sysrq_sysctl_handler function in kernel/sysctl.c in the Linux kernel before 2.6.39 does not require the CAP_SYS_ADMIN capability to modify the dmesg_restrict value, which allows local users to bypass intended access restrictions and read the kernel ring buffer by leveraging root privileges, as demonstrated by a root user in a Linux Containers (aka LXC) environment.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: 2.6.0 - 2.6.38.8

CPE2.3

External links

https://ftp.osuosl.org/pub/linux/kernel/v2.6/ChangeLog-2.6.39
https://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=bfdc0b497faa82a0ba2f9dddcf109231dd519fcc
https://www.openwall.com/lists/oss-security/2011/10/26/10
https://github.com/torvalds/linux/commit/bfdc0b497faa82a0ba2f9dddcf109231dd519fcc

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

8) Input validation error

EUVDB-ID: #VU44039

Risk: Medium

CVSSv4.0: 4.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2011-2521

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.

The x86_assign_hw_event function in arch/x86/kernel/cpu/perf_event.c in the Performance Events subsystem in the Linux kernel before 2.6.39 does not properly calculate counter values, which allows local users to cause a denial of service (panic) via the perf program.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: 2.6.0 - 2.6.38.8

CPE2.3

External links

https://ftp.osuosl.org/pub/linux/kernel/v2.6/ChangeLog-2.6.39
https://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=fc66c5210ec2539e800e87d7b3a985323c7be96e
https://www.openwall.com/lists/oss-security/2011/07/06/4
https://bugzilla.redhat.com/show_bug.cgi?id=719228
https://github.com/torvalds/linux/commit/fc66c5210ec2539e800e87d7b3a985323c7be96e

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

9) Input validation error

EUVDB-ID: #VU44075

Risk: Medium

CVSSv4.0: 4.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2011-4611

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.

Integer overflow in the perf_event_interrupt function in arch/powerpc/kernel/perf_event.c in the Linux kernel before 2.6.39 on powerpc platforms allows local users to cause a denial of service (unhandled performance monitor exception) via vectors that trigger certain outcomes of performance events.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: 2.6.0 - 2.6.38.8

CPE2.3

External links

https://ftp.osuosl.org/pub/linux/kernel/v2.6/ChangeLog-2.6.39
https://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=0837e3242c73566fc1c0196b4ec61779c25ffc93
https://www.openwall.com/lists/oss-security/2011/12/15/2
https://bugzilla.redhat.com/show_bug.cgi?id=767914
https://github.com/torvalds/linux/commit/0837e3242c73566fc1c0196b4ec61779c25ffc93

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

10) Resource management error

EUVDB-ID: #VU44079

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2011-4326

CWE-ID: CWE-399 - Resource Management Errors

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.

The udp6_ufo_fragment function in net/ipv6/udp.c in the Linux kernel before 2.6.39, when a certain UDP Fragmentation Offload (UFO) configuration is enabled, allows remote attackers to cause a denial of service (system crash) by sending fragmented IPv6 UDP packets to a bridge device.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: 2.6.0 - 2.6.38.8

CPE2.3

External links

https://downloads.avaya.com/css/P8/documents/100156038
https://ftp.osuosl.org/pub/linux/kernel/v2.6/ChangeLog-2.6.39
https://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=a9cf73ea7ff78f52662c8658d93c226effbbedde
https://www.openwall.com/lists/oss-security/2011/11/21/10
https://www.securityfocus.com/bid/50751
https://bugzilla.redhat.com/show_bug.cgi?id=682066
https://bugzilla.redhat.com/show_bug.cgi?id=755584
https://github.com/torvalds/linux/commit/a9cf73ea7ff78f52662c8658d93c226effbbedde

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

11) NULL pointer dereference

EUVDB-ID: #VU44082

Risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2011-3637

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: No

Description

The vulnerability allows a local authenticated user to perform a denial of service (DoS) attack.

The m_stop function in fs/proc/task_mmu.c in the Linux kernel before 2.6.39 allows local users to cause a denial of service (OOPS) via vectors that trigger an m_start error.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: 2.6.0 - 2.6.38.8

CPE2.3

External links

https://ftp.osuosl.org/pub/linux/kernel/v2.6/ChangeLog-2.6.39
https://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=76597cd31470fa130784c78fadb4dab2e624a723
https://www.openwall.com/lists/oss-security/2012/02/06/1
https://bugzilla.redhat.com/show_bug.cgi?id=747848
https://github.com/torvalds/linux/commit/76597cd31470fa130784c78fadb4dab2e624a723

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

Risk	High
Patch available	YES
Number of vulnerabilities	11
CVE-ID	CVE-2011-4087 CVE-2011-1180 CVE-2011-1182 CVE-2011-2479 CVE-2011-3359 CVE-2011-3363 CVE-2011-4080 CVE-2011-2521 CVE-2011-4611 CVE-2011-4326 CVE-2011-3637
CWE-ID	CWE-665 CWE-787 CWE-20 CWE-399 CWE-119 CWE-264 CWE-476
Exploitation vector	Network
Public exploit	N/A
Vulnerable software	Linux kernel Operating systems & Components / Operating system
Vendor	Linux Foundation