#VU99893 Information exposure in Linux kernel - CVE-2006-4813

Vulnerability identifier: #VU99893

Vulnerability risk: Low

CVSSv4.0: 1.1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2006-4813

CWE-ID: CWE-200

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Linux kernel
Operating systems & Components / Operating system

Vendor: Linux Foundation

Description

The vulnerability allows a local user to gain access to sensitive information.

The __block_prepare_write function in fs/buffer.c for Linux kernel 2.6.x before 2.6.13 does not properly clear buffers during certain error conditions, which allows local users to read portions of files that have been unlinked.

Mitigation
Install update from vendor's repository.

Vulnerable software versions

Linux kernel: All versions

---

External links
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=207463
https://www.us.debian.org/security/2006/dsa-1233
https://www.ubuntu.com/usn/usn-395-1
https://secunia.com/advisories/23370
https://secunia.com/advisories/23384
https://www.novell.com/linux/security/advisories/2006_79_kernel.html
https://www.securityfocus.com/bid/21522
https://support.avaya.com/elmodocs2/security/ASA-2007-063.htm
https://rhn.redhat.com/errata/RHSA-2007-0014.html
https://secunia.com/advisories/23752
https://secunia.com/advisories/23997
https://secunia.com/advisories/24206
https://www.mandriva.com/security/advisories?name=MDKSA-2007:012
https://www.mandriva.com/security/advisories?name=MDKSA-2007:025
https://secunia.com/advisories/23474
https://osvdb.org/31376
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11701
https://www.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=152becd26e0563aefdbc4fd1fe491928efe92d1f

---

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.