GnuTLS up to 3.3.25/3.5.7 OpenPGP Certificate out-of-bounds

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.
7.2$0-$5k0.00

Summaryinfo

A vulnerability was found in GnuTLS up to 3.3.25/3.5.7. It has been rated as critical. The affected element is an unknown function of the component OpenPGP Certificate Handler. Performing a manipulation results in out-of-bounds. This vulnerability is reported as CVE-2017-5335. The attack is possible to be carried out remotely. No exploit exists. Upgrading the affected component is advised.

Detailsinfo

A vulnerability, which was classified as critical, was found in GnuTLS up to 3.3.25/3.5.7 (Network Encryption Software). This affects an unknown function of the component OpenPGP Certificate Handler. The manipulation with an unknown input leads to a out-of-bounds vulnerability. CWE is classifying the issue as CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

The stream reading functions in lib/opencdk/read-packet.c in GnuTLS before 3.3.26 and 3.5.x before 3.5.8 allow remote attackers to cause a denial of service (out-of-memory error and crash) via a crafted OpenPGP certificate.

The bug was discovered 01/11/2017. The weakness was disclosed 01/11/2017 as confirmed advisory (Website). The advisory is shared at gnutls.org. This vulnerability is uniquely identified as CVE-2017-5335 since 01/10/2017. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Neither technical details nor an exploit are publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 97951 (CentOS 6 : gnutls (CESA-2017:0574)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CentOS Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 276395 (Fedora Security Update for gnutls (FEDORA-2017-e86817c42e)).

Upgrading to version 3.3.26 or 3.5.8 eliminates this vulnerability. A possible mitigation has been published 3 months after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (97951), SecurityFocus (BID 95374†) and SecurityTracker (ID 1037576†). The entries VDB-95276, VDB-95278 and VDB-95279 are pretty similar. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.4
VulDB Meta Temp Score: 7.2

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Out-of-bounds
CWE: CWE-125 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Nessus ID: 97951
Nessus Name: CentOS 6 : gnutls (CESA-2017:0574)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 867773
OpenVAS Name: Fedora Update for gnutls FEDORA-2017-e86817c42e
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: GnuTLS 3.3.26/3.5.8
Patch: gitlab.com

Timelineinfo

01/10/2017 🔍
01/11/2017 +1 days 🔍
01/11/2017 +0 days 🔍
01/11/2017 +0 days 🔍
01/11/2017 +0 days 🔍
01/13/2017 +2 days 🔍
03/24/2017 +70 days 🔍
03/24/2017 +0 days 🔍
03/27/2017 +3 days 🔍
10/28/2022 +2041 days 🔍

Sourcesinfo

Advisory: RHSA-2017:2292
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2017-5335 (🔍)
GCVE (CVE): GCVE-0-2017-5335
GCVE (VulDB): GCVE-100-95277
SecurityFocus: 95374 - GnuTLS CVE-2017-5335 Multiple Buffer Overflow Vulnerabilities
OSVDB: - CVE-2017-5335 - GnuTLS - Denial of Service Issue
SecurityTracker: 1037576

See also: 🔍

Entryinfo

Created: 01/13/2017 11:39
Updated: 10/28/2022 14:30
Changes: 01/13/2017 11:39 (80), 08/31/2020 16:58 (7), 10/28/2022 14:28 (5), 10/28/2022 14:30 (1)
Complete: 🔍
Cache ID: 216:B87:103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Do you need the next level of professionalism?

Upgrade your account now!