Linux Kernel 3.9 Crypto crypto/algif_hash.c hash_recvmsg information disclosure

CVSS Meta Temp Score
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CTI Interest Score
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5.9$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, was found in Linux Kernel 3.9. This affects the function hash_recvmsg of the file crypto/algif_hash.c of the component Crypto Handler. Executing a manipulation can lead to information disclosure. This vulnerability is registered as CVE-2013-3076. No exploit is available. It is advisable to implement a patch to correct this issue.

Detailsinfo

A vulnerability has been found in Linux Kernel 3.9 (Operating System) and classified as problematic. This vulnerability affects the function hash_recvmsg of the file crypto/algif_hash.c of the component Crypto Handler. The manipulation with an unknown input leads to a information disclosure vulnerability. The CWE definition for the vulnerability is CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. As an impact it is known to affect confidentiality. CVE summarizes:

The crypto API in the Linux kernel through 3.9-rc8 does not initialize certain length variables, which allows local users to obtain sensitive information from kernel stack memory via a crafted recvmsg or recvfrom system call, related to the hash_recvmsg function in crypto/algif_hash.c and the skcipher_recvmsg function in crypto/algif_skcipher.c.

The weakness was published 04/07/2013 by Mathias Krause as not defined changelog entry (GIT Repository). The advisory is shared for download at github.com. This vulnerability was named CVE-2013-3076 since 04/15/2013. The exploitation appears to be easy. The attack needs to be approached locally. No form of authentication is required for a successful exploitation. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1592.

The vulnerability scanner Nessus provides a plugin with the ID 66590 (Ubuntu 13.04 : linux vulnerabilities (USN-1837-1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Ubuntu Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 165947 (SUSE Enterprise Linux Security Update for Linux Kernel (SUSE-SU-2013:1182-2)).

Applying a patch is able to eliminate this problem. The bugfix is ready for download at github.com. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (83717), Tenable (66590), SecurityFocus (BID 59377†), OSVDB (92670†) and Secunia (SA53463†). Similar entries are available at VDB-7886, VDB-8486, VDB-8499 and VDB-8597. Once again VulDB remains the best source for vulnerability data.

Affected

  • crypto/algif_hash.c [hash_recvmsg()]
  • crypto/algif_skcipher.c [skcipher_recvmsg()]

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.2
VulDB Meta Temp Score: 5.9

VulDB Base Score: 6.2
VulDB Temp Score: 5.9
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

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

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 66590
Nessus Name: Ubuntu 13.04 : linux vulnerabilities (USN-1837-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 892669
OpenVAS Name: Debian Security Advisory DSA 2669-1 (linux - privilege escalation/denial of service/information leak
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: github.com

Timelineinfo

04/07/2013 🔍
04/07/2013 +0 days 🔍
04/07/2013 +0 days 🔍
04/14/2013 +7 days 🔍
04/15/2013 +1 days 🔍
04/22/2013 +7 days 🔍
04/24/2013 +2 days 🔍
05/21/2013 +27 days 🔍
05/25/2013 +4 days 🔍
05/27/2013 +2 days 🔍
05/10/2021 +2905 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: github.com
Researcher: Mathias Krause
Status: Not defined
Confirmation: 🔍

CVE: CVE-2013-3076 (🔍)
GCVE (CVE): GCVE-0-2013-3076
GCVE (VulDB): GCVE-100-8500

OVAL: 🔍

X-Force: 83717
SecurityFocus: 59377 - Linux Kernel CVE-2013-3222 Local Information Disclosure Vulnerability
Secunia: 53463 - Red Hat update for kernel-rt, Less Critical
OSVDB: 92670
Vulnerability Center: 39715 - Linux Kernel <=3.9-rc8 Crypto API Allows Local Information Disclosure via a Crafted 'recvmsg\x27, Low

See also: 🔍

Entryinfo

Created: 04/24/2013 11:58
Updated: 05/10/2021 09:03
Changes: 04/24/2013 11:58 (84), 04/30/2017 12:46 (4), 05/10/2021 09:03 (3)
Complete: 🔍
Committer: olku
Cache ID: 216:CAC:103

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