Missing release of memory after effective lifetime in Linux kernel

1) Missing release of memory after effective lifetime

EUVDB-ID: #VU94775

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-2007-2525

CWE-ID: CWE-401 - Missing release of memory after effective lifetime

Exploit availability: No

Description

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

Memory leak in the PPP over Ethernet (PPPoE) socket implementation in the Linux kernel before 2.6.21-git8 allows local users to cause a denial of service (memory consumption) by creating a socket using connect, and releasing it before the PPPIOCGCHAN ioctl is initialized.

Mitigation

Install update from vendor's repository.

Vulnerable software versions

Linux kernel: All versions

CPE2.3

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

External links

https://kernel.org/pub/linux/kernel/v2.6/snapshots/patch-2.6.21-git8.log
https://rhn.redhat.com/errata/RHSA-2007-0488.html
https://secunia.com/advisories/25163
https://secunia.com/advisories/25700
https://secunia.com/advisories/25838
https://secunia.com/advisories/26133
https://secunia.com/advisories/26139
https://secunia.com/advisories/26289
https://secunia.com/advisories/26450
https://secunia.com/advisories/26620
https://secunia.com/advisories/26664
https://secunia.com/advisories/27227
https://secunia.com/advisories/29058
https://support.avaya.com/elmodocs2/security/ASA-2007-287.htm
https://www.debian.org/security/2007/dsa-1356
https://www.debian.org/security/2008/dsa-1503
https://www.debian.org/security/2008/dsa-1504
https://www.mandriva.com/security/advisories?name=MDKSA-2007:171
https://www.mandriva.com/security/advisories?name=MDKSA-2007:196
https://www.mandriva.com/security/advisories?name=MDKSA-2007:216
https://www.novell.com/linux/security/advisories/2007_51_kernel.html
https://www.novell.com/linux/security/advisories/2007_53_kernel.html
https://www.securityfocus.com/bid/23870
https://www.ubuntu.com/usn/usn-486-1
https://www.ubuntu.com/usn/usn-489-1
https://www.ubuntu.com/usn/usn-510-1
https://www.vupen.com/english/advisories/2007/1703
https://exchange.xforce.ibmcloud.com/vulnerabilities/34150
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10594
https://rhn.redhat.com/errata/RHSA-2007-0376.html

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.