mount.ecrpytfs_private up to 87-0ubuntu1.1 mtab.tmp setreuid 7pk security

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.7$0-$5k0.00

A vulnerability, which was classified as critical, was found in mount.ecrpytfs_private up to 87-0ubuntu1.1. Affected is the function setreuid of the file mtab.tmp. The manipulation with an unknown input leads to a 7pk security vulnerability. CWE is classifying the issue as CWE-254. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

When mount.ecrpytfs_private before version 87-0ubuntu1.2 calls setreuid() it doesn't also set the effective group id. So when it creates the new version, mtab.tmp, it's created with the group id of the user running mount.ecryptfs_private.

The bug was discovered 08/23/2011. The weakness was released 04/22/2019 by Dan Rosenberg. This vulnerability is traded as CVE-2011-3145 since 08/16/2011. The attack needs to be approached locally. The successful exploitation requires a authentication. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1211.

The vulnerability was handled as a non-public zero-day exploit for at least 9 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 68338 (Oracle Linux 5 / 6 : ecryptfs-utils (ELSA-2011-1241)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Oracle Linux Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 119656 (CentOS Security Update for eCryptfs (CESA-2011:1241)).

Upgrading to version 87-0ubuntu1.2 eliminates this vulnerability. A possible mitigation has been published even before and not after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (68338). Entries connected to this vulnerability are available at 62530, 66403, 66402 and 66401.

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
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CVSSv3info

VulDB Meta Base Score: 7.8
VulDB Meta Temp Score: 7.7

VulDB Base Score: 5.9
VulDB Temp Score: 5.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: 7pk security
CWE: CWE-254
CAPEC: 🔍
ATT&CK: 🔍

Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 68338
Nessus Name: Oracle Linux 5 / 6 : ecryptfs-utils (ELSA-2011-1241)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 80056
OpenVAS Name: Oracle Linux Local Check: ELSA-2011-1241
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: mount.ecrpytfs_private 87-0ubuntu1.2

Timelineinfo

08/10/2011 🔍
08/16/2011 +6 days 🔍
08/23/2011 +7 days 🔍
09/01/2011 +9 days 🔍
07/12/2013 +680 days 🔍
04/22/2019 +2110 days 🔍
04/23/2019 +1 days 🔍
09/06/2023 +1597 days 🔍

Sourcesinfo

Advisory: RHSA-2011:1241
Researcher: Dan Rosenberg
Status: Not defined

CVE: CVE-2011-3145 (🔍)
OVAL: 🔍

SecurityFocus: 49108 - Linux Kernel eCryptfs Multiple Vulnerabilities
OSVDB: 74869 - CVE-2011-3145 - mount.ecrpytfs_private - Security Bypass Issue

See also: 🔍

Entryinfo

Created: 04/23/2019 08:08
Updated: 09/06/2023 07:24
Changes: 04/23/2019 08:08 (74), 06/01/2020 06:56 (6), 09/06/2023 07:17 (4), 09/06/2023 07:24 (1)
Complete: 🔍

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