PgBouncer up to 1.5.4 Password Packet src/client.c null pointer dereference

CVSS Meta Temp Score
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CTI Interest Score
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6.3$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, has been found in PgBouncer up to 1.5.4. This impacts an unknown function of the file src/client.c of the component Password Packet Handler. The manipulation leads to null pointer dereference. This vulnerability is uniquely identified as CVE-2015-4054. The attack is possible to be carried out remotely. No exploit exists. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in PgBouncer up to 1.5.4. It has been rated as problematic. This issue affects an unknown functionality of the file src/client.c of the component Password Packet Handler. The manipulation with an unknown input leads to a null pointer dereference vulnerability. Using CWE to declare the problem leads to CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. Impacted is availability. The summary by CVE is:

PgBouncer before 1.5.5 allows remote attackers to cause a denial of service (NULL pointer dereference and crash) by sending a password packet before a startup packet.

The bug was discovered 05/22/2015. The weakness was disclosed 05/23/2017 by wwodecki (oss-sec). It is possible to read the advisory at openwall.com. The identification of this vulnerability is CVE-2015-4054 since 05/21/2015. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability was handled as a non-public zero-day exploit for at least 19 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 84105 (FreeBSD : pgbouncer -- remote denial of service (8fbd4187-0f18-11e5-b6a8-002590263bf5)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family FreeBSD Local Security Checks and running in the context l.

Upgrading to version 1.5.5 eliminates this vulnerability. A possible mitigation has been published before and not just after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (84105) and SecurityFocus (BID 74751†). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

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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

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

NVD Base Score: 🔍

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
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: 84105
Nessus Name: FreeBSD : pgbouncer -- remote denial of service (8fbd4187-0f18-11e5-b6a8-002590263bf5)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: PgBouncer 1.5.5
Patch: github.com

Timelineinfo

05/21/2015 🔍
05/21/2015 +0 days 🔍
05/22/2015 +1 days 🔍
06/10/2015 +19 days 🔍
06/11/2015 +1 days 🔍
05/23/2017 +712 days 🔍
05/23/2017 +0 days 🔍
05/23/2017 +0 days 🔍
12/07/2022 +2024 days 🔍

Sourcesinfo

Product: github.com

Advisory: 74d6e5f7de5ec736f71204b7b422af7380c19ac5
Researcher: wwodecki (wwodecki)
Status: Not defined
Confirmation: 🔍

CVE: CVE-2015-4054 (🔍)
GCVE (CVE): GCVE-0-2015-4054
GCVE (VulDB): GCVE-100-101627
SecurityFocus: 74751 - PgBouncer src/client.c' Denial of Service Vulnerability
OSVDB: - CVE-2015-4054 - Pgbouncer Project - Pgbouncer - Medium

Entryinfo

Created: 05/23/2017 12:37
Updated: 12/07/2022 07:40
Changes: 05/23/2017 12:37 (71), 10/01/2020 21:26 (3), 12/25/2020 13:39 (2), 12/07/2022 07:40 (4)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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