Linux Kernel 3.2.53/3.4.72/3.10.22/3.12.3 net/l2tp/l2tp_ip.c l2tp_ip_recvmsg input validation
| CVSS Meta Temp Score | Current Exploit Price (≈) | CTI Interest Score |
|---|---|---|
| 5.9 | $0-$5k | 0.00 |
Summary
A vulnerability identified as problematic has been detected in Linux Kernel 3.2.53/3.4.72/3.10.22/3.12.3. The impacted element is the function l2tp_ip_recvmsg of the file net/l2tp/l2tp_ip.c. This manipulation causes input validation.
This vulnerability is registered as CVE-2013-7264. No exploit is available.
You should upgrade the affected component.
Details
A vulnerability classified as problematic was found in Linux Kernel 3.2.53/3.4.72/3.10.22/3.12.3 (Operating System). Affected by this vulnerability is the function l2tp_ip_recvmsg of the file net/l2tp/l2tp_ip.c. The manipulation with an unknown input leads to a input validation vulnerability. The CWE definition for the vulnerability is CWE-20. The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. As an impact it is known to affect confidentiality. The summary by CVE is:
The l2tp_ip_recvmsg function in net/l2tp/l2tp_ip.c in the Linux kernel before 3.12.4 updates a certain length value before ensuring that an associated data structure has been initialized, which allows local users to obtain sensitive information from kernel stack memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call.
The weakness was published 11/18/2013 by Brad Spengler and Tom Labanowski as Linux kernel: net: uninitialised memory leakage as confirmed mailinglist post (oss-sec). It is possible to read the advisory at seclists.org. This vulnerability is known as CVE-2013-7264 since 11/04/2013. The exploitation appears to be easy. Attacking locally is a requirement. The exploitation doesn't need any form of authentication. Technical details of the vulnerability are known, but there is no available exploit.
The vulnerability scanner Nessus provides a plugin with the ID 71398 (Amazon Linux AMI : kernel (ALAS-2013-258)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Amazon Linux Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 167228 (SUSE Enterprise Linux Security Update for Linux Kernel (SUSE-SU-2014:0807-1)).
Upgrading to version 3.2.54, 3.4.73, 3.10.23 or 3.12.4 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version. A possible mitigation has been published immediately after the disclosure of the vulnerability.
The vulnerability is also documented in the databases at X-Force (90116), Tenable (71398), SecurityFocus (BID 64685†), OSVDB (101784†) and Secunia (SA55882†). Similar entries are available at VDB-11302, VDB-11336, VDB-11712 and VDB-11756. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.
Product
Type
Vendor
Name
Version
License
Website
- Vendor: https://www.kernel.org/
CPE 2.3
CPE 2.2
CVSSv4
VulDB Vector: 🔍VulDB Reliability: 🔍
CVSSv3
VulDB Meta Base Score: 6.2VulDB Meta Temp Score: 5.9
VulDB Base Score: 6.2
VulDB Temp Score: 5.9
VulDB Vector: 🔍
VulDB Reliability: 🔍
CVSSv2
| AV | AC | Au | C | I | A |
|---|---|---|---|---|---|
| 💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
| 💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
| 💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
| Vector | Complexity | Authentication | Confidentiality | Integrity | Availability |
|---|---|---|---|---|---|
| Unlock | Unlock | Unlock | Unlock | Unlock | Unlock |
| Unlock | Unlock | Unlock | Unlock | Unlock | Unlock |
| Unlock | Unlock | Unlock | Unlock | Unlock | Unlock |
VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍
NVD Base Score: 🔍
Exploiting
Class: Input validationCWE: CWE-20
CAPEC: 🔍
ATT&CK: 🔍
Physical: Partially
Local: Yes
Remote: No
Availability: 🔍
Status: Not defined
EPSS Score: 🔍
EPSS Percentile: 🔍
Price Prediction: 🔍
Current Price Estimation: 🔍
| 0-Day | Unlock | Unlock | Unlock | Unlock |
|---|---|---|---|---|
| Today | Unlock | Unlock | Unlock | Unlock |
Nessus ID: 71398
Nessus Name: Amazon Linux AMI : kernel (ALAS-2013-258)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
OpenVAS ID: 841723
OpenVAS Name: Ubuntu Update for linux USN-2107-1
OpenVAS File: 🔍
OpenVAS Family: 🔍
Qualys ID: 🔍
Qualys Name: 🔍
Threat Intelligence
Interest: 🔍Active Actors: 🔍
Active APT Groups: 🔍
Countermeasures
Recommended: UpgradeStatus: 🔍
Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍
Upgrade: Kernel 3.2.54/3.4.73/3.10.23/3.12.4
Patch: git.kernel.org
Timeline
11/04/2013 🔍11/18/2013 🔍
11/18/2013 🔍
11/18/2013 🔍
11/18/2013 🔍
01/06/2014 🔍
01/06/2014 🔍
01/09/2014 🔍
02/17/2014 🔍
06/04/2021 🔍
Sources
Vendor: kernel.orgAdvisory: Linux kernel: net: uninitialised memory leakage
Researcher: Brad Spengler, Tom Labanowski
Status: Confirmed
Confirmation: 🔍
CVE: CVE-2013-7264 (🔍)
GCVE (CVE): GCVE-0-2013-7264
GCVE (VulDB): GCVE-100-11755
OVAL: 🔍
X-Force: 90116
SecurityFocus: 64685 - Linux Kernel Memory Leak Multiple Local Information Disclosure Vulnerabilities
Secunia: 55882 - Linux Kernel "recvmsg()" and "recvfrom()" Information Disclosure Weakn, Not Critical
OSVDB: 101784
Vulnerability Center: 43302 - Linux Kernel before 3.12.4 Local Information Disclosure Vulnerability in l2tp_ip_recvmsg(), Medium
See also: 🔍
Entry
Created: 01/09/2014 09:15Updated: 06/04/2021 18:05
Changes: 01/09/2014 09:15 (80), 05/21/2017 14:04 (6), 06/04/2021 18:05 (3)
Complete: 🔍
Committer: olku
Cache ID: 216:358:103
No comments yet. Languages: en.
Please log in to comment.