GnuTLS up to 3.5.12 TLS Extension Status Response 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 GnuTLS up to 3.5.12. Impacted is an unknown function of the component TLS Extension. The manipulation as part of Status Response leads to null pointer dereference. This vulnerability is referenced as CVE-2017-7507. Remote exploitation of the attack is possible. No exploit is available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in GnuTLS up to 3.5.12 (Network Encryption Software). It has been rated as problematic. This issue affects an unknown functionality of the component TLS Extension. The manipulation as part of a Status Response 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:

GnuTLS version 3.5.12 and earlier is vulnerable to a NULL pointer dereference while decoding a status response TLS extension with valid contents. This could lead to a crash of the GnuTLS server application.

The bug was discovered 06/07/2017. The weakness was published 06/16/2017 by Security Team with Red Hat (Website). It is possible to read the advisory at gnutls.org. The identification of this vulnerability is CVE-2017-7507 since 04/05/2017. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. The technical details are unknown and an exploit is not publicly available.

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 100852 (Debian DSA-3884-1 : gnutls28 - 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 236415 (Red Hat Update for gnutls (RHSA-2017:2292)).

Upgrading 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 (100852) and SecurityFocus (BID 99102†). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

Name

Version

License

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: 100852
Nessus Name: Debian DSA-3884-1 : gnutls28 - security update
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 703884
OpenVAS Name: Debian Security Advisory DSA 3884-1 (gnutls28 - 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: 🔍

Timelineinfo

04/05/2017 🔍
06/07/2017 +63 days 🔍
06/07/2017 +0 days 🔍
06/16/2017 +9 days 🔍
06/16/2017 +0 days 🔍
06/16/2017 +0 days 🔍
06/17/2017 +1 days 🔍
06/19/2017 +2 days 🔍
12/08/2022 +1998 days 🔍

Sourcesinfo

Advisory: RHSA-2017:2292
Researcher: Security Team
Organization: Red Hat
Status: Not defined
Confirmation: 🔍

CVE: CVE-2017-7507 (🔍)
GCVE (CVE): GCVE-0-2017-7507
GCVE (VulDB): GCVE-100-102635

OVAL: 🔍

SecurityFocus: 99102 - GnuTLS CVE-2017-7507 NULL Pointer Dereference Denial of Service Vulnerability

Entryinfo

Created: 06/17/2017 10:55
Updated: 12/08/2022 14:51
Changes: 06/17/2017 10:55 (74), 10/18/2019 19:04 (8), 12/08/2022 14:51 (4)
Complete: 🔍
Cache ID: 216::103

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

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