PostgreSQL up to 9.6.3 Object lo_put improper authorization

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
6.1	$0-$5k	0.00

Summaryinfo

A vulnerability, which was classified as problematic, has been found in PostgreSQL up to 9.2.21/9.3.17/9.4.12/9.5.7/9.6.3. Affected by this vulnerability is the function lo_put of the component Object Handler. The manipulation leads to improper authorization. This vulnerability is documented as CVE-2017-7548. The attack can be initiated remotely. There is not any exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in PostgreSQL up to 9.2.21/9.3.17/9.4.12/9.5.7/9.6.3 (Database Software). It has been rated as problematic. This issue affects the function lo_put of the component Object Handler. The manipulation with an unknown input leads to a improper authorization vulnerability. Using CWE to declare the problem leads to CWE-285. The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action. Impacted is availability. The summary by CVE is:

PostgreSQL versions before 9.4.13, 9.5.8 and 9.6.4 are vulnerable to authorization flaw allowing remote authenticated attackers with no privileges on a large object to overwrite the entire contents of the object, resulting in a denial of service.

The bug was discovered 08/10/2017. The weakness was released 08/10/2017 as 2017-08-10 Security Update Release as confirmed news (Website). The advisory is shared at postgresql.org. The identification of this vulnerability is CVE-2017-7548 since 04/05/2017. The attack may be initiated remotely. The successful exploitation needs a simple authentication. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1548.002 for this issue.

The vulnerability scanner Nessus provides a plugin with the ID 102442 (Debian DSA-3935-1 : postgresql-9.4 - security update), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Debian Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 176111 (Debian Security Update for postgresql-9.6 (DSA 3936-1)).

Upgrading to version 9.2.22, 9.3.18, 9.4.13, 9.5.8 or 9.6.4 eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (102442), SecurityFocus (BID 100276†) and SecurityTracker (ID 1039142†). Entries connected to this vulnerability are available at VDB-105279 and VDB-105280. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• Database Software

Name

• PostgreSQL

Version

• 9.2.0
• 9.2.1
• 9.2.2
• 9.2.3
• 9.2.4
• 9.2.5
• 9.2.6
• 9.2.7
• 9.2.8
• 9.2.9
• 9.2.10
• 9.2.11
• 9.2.12
• 9.2.13
• 9.2.14
• 9.2.15
• 9.2.16
• 9.2.17
• 9.2.18
• 9.2.19
• 9.2.20
• 9.2.21
• 9.3.0
• 9.3.1
• 9.3.2
• 9.3.3
• 9.3.4
• 9.3.5
• 9.3.6
• 9.3.7
• 9.3.8
• 9.3.9
• 9.3.10
• 9.3.11
• 9.3.12
• 9.3.13
• 9.3.14
• 9.3.15
• 9.3.16
• 9.3.17
• 9.4.0
• 9.4.1
• 9.4.2
• 9.4.3
• 9.4.4
• 9.4.5
• 9.4.6
• 9.4.7
• 9.4.8
• 9.4.9
• 9.4.10
• 9.4.11
• 9.4.12
• 9.5.0
• 9.5.1
• 9.5.2
• 9.5.3
• 9.5.4
• 9.5.5
• 9.5.6
• 9.5.7
• 9.6.0
• 9.6.1
• 9.6.2
• 9.6.3

License

• open-source

Website

• Product: https://www.postgresql.org/

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.3

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

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: 🔍

Exploitinginfo

Class: Improper authorization
CWE: CWE-285 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

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: 102442
Nessus Name: Debian DSA-3935-1 : postgresql-9.4 - security update
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 53676
OpenVAS Name: Debian Security Advisory DSA 3936-1 (postgresql-9.6 - security update)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Upgrade: PostgreSQL 9.2.22/9.3.18/9.4.13/9.5.8/9.6.4

Timelineinfo

04/05/2017 🔍
08/10/2017 +127 days 🔍
08/10/2017 +0 days 🔍
08/10/2017 +0 days 🔍
08/10/2017 +0 days 🔍
08/11/2017 +1 days 🔍
08/13/2017 +2 days 🔍
08/14/2017 +1 days 🔍
08/16/2017 +2 days 🔍
01/09/2021 +1242 days 🔍

Sourcesinfo

Product: postgresql.org

Advisory: 2017-08-10 Security Update Release
Researcher: Chapman Flack
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2017-7548 (🔍)
GCVE (CVE): GCVE-0-2017-7548
GCVE (VulDB): GCVE-100-105281

OVAL: 🔍

SecurityFocus: 100276 - PostgreSQL CVE-2017-7548 Remote Denial Of Service Vulnerability
SecurityTracker: 1039142

See also: 🔍

Entryinfo

Created: 08/13/2017 19:23
Updated: 01/09/2021 11:29
Changes: 08/13/2017 19:23 (82), 11/06/2019 17:48 (5), 01/09/2021 11:29 (3)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Discussion

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