Integer overflow in Linux kernel ext4

1) Integer overflow

EUVDB-ID: #VU91191

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-2010-3015

CWE-ID: CWE-190 - Integer overflow

Exploit availability: No

Description

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

The vulnerability exists due to integer overflow within the ext4_ext_in_cache() and ext4_ext_get_blocks() functions in fs/ext4/extents.c, within the ext4_init_block_bitmap() function in fs/ext4/balloc.c. A local user can perform a denial of service (DoS) attack.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: All versions

CPE2.3

• cpe:2.3:o:linux_foundation:linux_kernel:*:*:*:*:*:*:*:*

External links

https://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=731eb1a03a8445cde2cb23ecfb3580c6fa7bb690
https://lists.opensuse.org/opensuse-security-announce/2010-09/msg00004.html
https://lists.opensuse.org/opensuse-security-announce/2010-11/msg00000.html
https://lists.opensuse.org/opensuse-security-announce/2011-02/msg00000.html
https://marc.info/?l=oss-security&m=128192548904503&w=2
https://marc.info/?l=oss-security&m=128197862004376&w=2
https://marc.info/?l=oss-security&m=128201627016896&w=2
https://secunia.com/advisories/46397
https://support.avaya.com/css/P8/documents/100113326
https://www.debian.org/security/2010/dsa-2094
https://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.34
https://www.mandriva.com/security/advisories?name=MDVSA-2010:172
https://www.mandriva.com/security/advisories?name=MDVSA-2010:247
https://www.mandriva.com/security/advisories?name=MDVSA-2011:029
https://www.redhat.com/support/errata/RHSA-2010-0723.html
https://www.securityfocus.com/archive/1/520102/100/0/threaded
https://www.securityfocus.com/bid/42477
https://www.ubuntu.com/usn/USN-1000-1
https://www.vmware.com/security/advisories/VMSA-2011-0012.html
https://www.vupen.com/english/advisories/2010/3117
https://www.vupen.com/english/advisories/2011/0298
https://bugzilla.redhat.com/show_bug.cgi?id=624327
https://exchange.xforce.ibmcloud.com/vulnerabilities/61156

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.