GnuTLS HMAC-SHA-384 Crafted Packet Lucky Thirteen cryptographic issue

CVSS Meta Temp Score
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CTI Interest Score
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5.7$0-$5k0.00

Summaryinfo

A vulnerability was found in GnuTLS. It has been declared as critical. This affects an unknown part of the component HMAC-SHA-384. Executing a manipulation as part of Crafted Packet can lead to cryptographic issue (Lucky Thirteen). This vulnerability is handled as CVE-2018-10845. The attack can be executed remotely. There is not any exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in GnuTLS (Network Encryption Software) (version now known). It has been declared as critical. This vulnerability affects some unknown processing of the component HMAC-SHA-384. The manipulation as part of a Crafted Packet leads to a cryptographic issue vulnerability (Lucky Thirteen). The CWE definition for the vulnerability is CWE-310. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

It was found that the GnuTLS implementation of HMAC-SHA-384 was vulnerable to a Lucky thirteen style attack. Remote attackers could use this flaw to conduct distinguishing attacks and plain text recovery attacks via statistical analysis of timing data using crafted packets.

The bug was discovered 08/21/2018. The weakness was released 08/22/2018 by Amir as confirmed bug report (Bugzilla). The advisory is shared for download at bugzilla.redhat.com. This vulnerability was named CVE-2018-10845 since 05/09/2018. The exploitation appears to be difficult. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1600.

The vulnerability was handled as a non-public zero-day exploit for at least 1 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 117702 (SUSE SLED12 / SLES12 Security Update : gnutls (SUSE-SU-2018:2842-1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family SuSE Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 157840 (Oracle Enterprise Linux Security Update for gnutls (ELSA-2018-3050)).

Upgrading eliminates this vulnerability. A possible mitigation has been published 2 months after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (117702) and SecurityFocus (BID 105138†). Entries connected to this vulnerability are available at VDB-102981, VDB-123135, VDB-123137 and VDB-132547. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.8
VulDB Meta Temp Score: 5.7

VulDB Base Score: 5.6
VulDB Temp Score: 5.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.9
NVD Vector: 🔍

CNA Base Score: 5.9
CNA Vector (Red Hat, Inc.): 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Name: Lucky Thirteen
Class: Cryptographic issue / Lucky Thirteen
CWE: CWE-310
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: 117702
Nessus Name: SUSE SLED12 / SLES12 Security Update : gnutls (SUSE-SU-2018:2842-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Timelineinfo

05/09/2018 🔍
08/21/2018 +104 days 🔍
08/21/2018 +0 days 🔍
08/22/2018 +0 days 🔍
08/22/2018 +0 days 🔍
08/23/2018 +1 days 🔍
09/24/2018 +32 days 🔍
09/25/2018 +1 days 🔍
05/04/2023 +1682 days 🔍

Sourcesinfo

Advisory: RHSA-2018:3050
Researcher: Amir
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2018-10845 (🔍)
GCVE (CVE): GCVE-0-2018-10845
GCVE (VulDB): GCVE-100-123136
SecurityFocus: 105138 - GnuTLS Multiple Information Disclosure Vulnerabilities

See also: 🔍

Entryinfo

Created: 08/23/2018 06:37
Updated: 05/04/2023 09:23
Changes: 08/23/2018 06:37 (76), 03/17/2020 15:09 (7), 05/04/2023 09:23 (16)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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