EMC Avamar up to 6.1 Temporary Cache File /var/avamar/f_cache.dat access control

CVSS Meta Temp Score
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CTI Interest Score
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4.0$0-$5k0.00

Summaryinfo

A vulnerability was found in EMC Avamar up to 6.1. It has been rated as problematic. The affected element is an unknown function of the file /var/avamar/f_cache.dat of the component Temporary Cache File Handler. This manipulation causes access control. The identification of this vulnerability is CVE-2012-2291. Furthermore, there is an exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in EMC Avamar up to 6.1 (Backup Software). It has been declared as problematic. Affected by this vulnerability is an unknown function of the file /var/avamar/f_cache.dat of the component Temporary Cache File Handler. The manipulation with an unknown input leads to a access control vulnerability. The CWE definition for the vulnerability is CWE-264. As an impact it is known to affect confidentiality, and integrity. The summary by CVE is:

EMC Avamar Client 4.x, 5.x, and 6.x on HP-UX and Mac OS X, and the EMC Avamar plugin 4.x, 5.x, and 6.x for Oracle, uses world-writable permissions for cache directories, which allows local users to gain privileges via an unspecified symlink attack.

The weakness was shared 12/19/2012 as EMC Avamar: World writable cache files as not defined mailinglist post (Bugtraq). The advisory is shared at seclists.org. The public release happened without involvement of EMC. This vulnerability is known as CVE-2012-2291 since 04/19/2012. An attack has to be approached locally. The successful exploitation requires a single authentication. Technical details and also a public exploit are known. MITRE ATT&CK project uses the attack technique T1068 for this issue.

A public exploit has been developed in Shell-Skript and been published immediately after the advisory. It is possible to download the exploit at seclists.org. It is declared as proof-of-concept. We expect the 0-day to have been worth approximately $25k-$100k.

Upgrading to version 7 eliminates this vulnerability. A possible mitigation has been published 2 months after the disclosure of the vulnerability. Will maybe be patched in mid-2013 since EMC does not patch security issues.

The vulnerability is also documented in the databases at X-Force (80751), SecurityFocus (BID 57005†), OSVDB (88530†), Secunia (SA51926†) and SecurityTracker (ID 1028021†). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.4
VulDB Meta Temp Score: 4.0

VulDB Base Score: 4.4
VulDB Temp Score: 4.0
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: Access control
CWE: CWE-264
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Programming Language: 🔍
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Upgrade: Avamar 7

Timelineinfo

04/19/2012 🔍
12/19/2012 +244 days 🔍
12/19/2012 +0 days 🔍
12/19/2012 +0 days 🔍
12/20/2012 +1 days 🔍
01/21/2013 +32 days 🔍
01/21/2013 +0 days 🔍
01/22/2013 +1 days 🔍
01/22/2013 +0 days 🔍
05/02/2018 +1926 days 🔍

Sourcesinfo

Vendor: dellemc.com

Advisory: EMC Avamar: World writable cache files
Status: Not defined

CVE: CVE-2012-2291 (🔍)
GCVE (CVE): GCVE-0-2012-2291
GCVE (VulDB): GCVE-100-7189
X-Force: 80751 - EMC Avamar file overrwite, Medium Risk
SecurityFocus: 57005 - EMC Avamar Backup Client Insecure File Permissions Vulnerability
Secunia: 51926 - EMC Avamar Cache Files Insecure Permissions Security Issue, Less Critical
OSVDB: 88530
SecurityTracker: 1028021

scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 12/20/2012 16:48
Updated: 05/02/2018 09:16
Changes: 12/20/2012 16:48 (75), 05/02/2018 09:16 (7)
Complete: 🔍
Cache ID: 216:694:103

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