Linux Kernel up to 4.6.3 RDS Message net/rds/recv.c rds_inc_info_copy flags Memory information disclosure

CVSS Meta Temp Score
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CTI Interest Score
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7.3$0-$5k0.00

Summaryinfo

A vulnerability categorized as problematic has been discovered in Linux Kernel up to 4.6.3. This affects the function rds_inc_info_copy of the file net/rds/recv.c of the component RDS Message Handler. Such manipulation of the argument flags leads to information disclosure (Memory). This vulnerability is documented as CVE-2016-5244. The attack can be executed remotely. There is not any exploit available. Applying a patch is advised to resolve this issue.

Detailsinfo

A vulnerability was found in Linux Kernel up to 4.6.3 (Operating System) and classified as critical. Affected by this issue is the function rds_inc_info_copy of the file net/rds/recv.c of the component RDS Message Handler. The manipulation of the argument flags with an unknown input leads to a information disclosure vulnerability (Memory). Using CWE to declare the problem leads to CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. Impacted is confidentiality. CVE summarizes:

The rds_inc_info_copy function in net/rds/recv.c in the Linux kernel through 4.6.3 does not initialize a certain structure member, which allows remote attackers to obtain sensitive information from kernel stack memory by reading an RDS message.

The weakness was released 06/03/2016 (oss-sec). The advisory is shared for download at openwall.com. This vulnerability is handled as CVE-2016-5244 since 06/03/2016. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1592. The advisory points out:

The last field "flags" of object "minfo" is not initialized. Copying this object out may leak kernel stack data.

The vulnerability scanner Nessus provides a plugin with the ID 92085 (Fedora 22 : kernel (2016-3daf782dfa)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Fedora Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 296031 (Solaris 11.4 Support Repository Update (SRU) 1.4.0 Missing).

Applying a patch is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. A possible mitigation has been published immediately after the disclosure of the vulnerability. The vulnerability will be addressed with the following lines of code:

minfo.flags = 0;
The advisory contains the following remark:
Assign 0 to it to avoid leak.

The vulnerability is also documented in the databases at Tenable (92085) and SecurityFocus (BID 91021†). Entries connected to this vulnerability are available at VDB-77706, VDB-88375, VDB-125630 and VDB-125635. If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.3

VulDB Base Score: 7.5
VulDB Temp Score: 7.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Name: Memory
Class: Information disclosure / Memory
CWE: CWE-200 / CWE-284 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 92085
Nessus Name: Fedora 22 : kernel (2016-3daf782dfa)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 800923
OpenVAS Name: Fedora Update for kernel FEDORA-2016-3daf782dfa
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Patch: git.kernel.org

Timelineinfo

06/03/2016 🔍
06/03/2016 +0 days 🔍
06/03/2016 +0 days 🔍
06/03/2016 +0 days 🔍
06/27/2016 +24 days 🔍
06/29/2016 +2 days 🔍
07/14/2016 +15 days 🔍
08/25/2022 +2233 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: FEDORA-2016-3daf782dfa
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-5244 (🔍)
GCVE (CVE): GCVE-0-2016-5244
GCVE (VulDB): GCVE-100-88376

OVAL: 🔍

SecurityFocus: 91021 - Linux Kernel 'net/rds/recv.c' Local Information Disclosure Vulnerability
SecurityTracker: 1041895

See also: 🔍

Entryinfo

Created: 06/29/2016 11:21
Updated: 08/25/2022 12:57
Changes: 06/29/2016 11:21 (73), 02/12/2019 10:36 (14), 08/25/2022 12:51 (4), 08/25/2022 12:57 (1)
Complete: 🔍
Cache ID: 216:7C3:103

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