CVE-2012-2100

high
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Description

The ext4_fill_flex_info function in fs/ext4/super.c in the Linux kernel before 3.2.2, on the x86 platform and unspecified other platforms, allows user-assisted remote attackers to trigger inconsistent filesystem-groups data and possibly cause a denial of service via a malformed ext4 filesystem containing a super block with a large FLEX_BG group size (aka s_log_groups_per_flex value). NOTE: this vulnerability exists because of an incomplete fix for CVE-2009-4307.

References

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=d50f2ab6f050311dbf7b8f5501b25f0bf64a439b

http://rhn.redhat.com/errata/RHSA-2012-1445.html

http://rhn.redhat.com/errata/RHSA-2012-1580.html

http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.2.2

http://www.openwall.com/lists/oss-security/2012/04/12/11

http://www.securityfocus.com/bid/53414

https://bugzilla.redhat.com/show_bug.cgi?id=809687

https://github.com/torvalds/linux/commit/d50f2ab6f050311dbf7b8f5501b25f0bf64a439b

Details

Source: MITRE

Published: 2012-07-03

Updated: 2013-02-08

Type: CWE-189

Risk Information

CVSS v2

Base Score: 7.1

Vector: AV:N/AC:M/Au:N/C:N/I:N/A:C

Impact Score: 6.9

Exploitability Score: 8.6

Severity: HIGH

Vulnerable Software

Configuration 1

OR

cpe:2.3:o:linux:linux_kernel:3.2:*:*:*:*:*:x86:*

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:x86:* versions up to 3.2.1 (inclusive)

Tenable Plugins

View all (20 total)

IDNameProductFamilySeverity
69707Amazon Linux AMI : kernel / nvidia (ALAS-2013-148)NessusAmazon Linux Local Security Checks
high
68690Oracle Linux 5 / 6 : Unbreakable Enterprise kernel (ELSA-2012-2048)NessusOracle Linux Local Security Checks
high
68666Oracle Linux 6 : kernel (ELSA-2012-1580)NessusOracle Linux Local Security Checks
high
68654Oracle Linux 5 : kernel (ELSA-2012-1445)NessusOracle Linux Local Security Checks
high
68653Oracle Linux 5 : kernel (ELSA-2012-1445-1)NessusOracle Linux Local Security Checks
high
63313Scientific Linux Security Update : kernel on SL6.x i386/x86_64 (20121218)NessusScientific Linux Local Security Checks
high
63305CentOS 6 : kernel (CESA-2012:1580)NessusCentOS Local Security Checks
high
63292RHEL 6 : kernel (RHSA-2012:1580)NessusRed Hat Local Security Checks
high
62924Scientific Linux Security Update : kernel on SL5.x i386/x86_64 (20121113)NessusScientific Linux Local Security Checks
high
62920CentOS 5 : kernel (CESA-2012:1445)NessusCentOS Local Security Checks
high
62916RHEL 5 : kernel (RHSA-2012:1445)NessusRed Hat Local Security Checks
high
59322USN-1458-1 : linux-ti-omap4 vulnerabilitiesNessusUbuntu Local Security Checks
critical
59034Ubuntu 10.04 LTS : linux-lts-backport-natty vulnerabilities (USN-1440-1)NessusUbuntu Local Security Checks
critical
59032Ubuntu 11.04 : linux vulnerabilities (USN-1432-1)NessusUbuntu Local Security Checks
high
58493Ubuntu 11.10 : linux vulnerabilities (USN-1405-1)NessusUbuntu Local Security Checks
critical
58270Ubuntu 10.04 LTS : linux vulnerabilities (USN-1389-1)NessusUbuntu Local Security Checks
high
58269Ubuntu 10.04 LTS : linux-ec2 vulnerabilities (USN-1388-1)NessusUbuntu Local Security Checks
high
58265Ubuntu 10.04 LTS : linux-lts-backport-oneiric vulnerabilities (USN-1384-1)NessusUbuntu Local Security Checks
high
801532CentOS RHSA-2012-1580 Security CheckLog Correlation EngineGeneric
high
801530CentOS RHSA-2012-1445 Security CheckLog Correlation EngineGeneric
high