GnuTLS HMAC-SHA-256 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 classified as critical. Affected by this issue is some unknown functionality of the component HMAC-SHA-256. Performing a manipulation as part of Crafted Packet results in cryptographic issue (Lucky Thirteen). This vulnerability is known as CVE-2018-10844. Remote exploitation of the attack is possible. No exploit is available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in GnuTLS (Network Encryption Software) (unknown version). It has been classified as critical. This affects an unknown code block of the component HMAC-SHA-256. The manipulation as part of a Crafted Packet leads to a cryptographic issue vulnerability (Lucky Thirteen). CWE is classifying the issue as CWE-310. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

It was found that the GnuTLS implementation of HMAC-SHA-256 was vulnerable to a Lucky thirteen style attack. Remote attackers could use this flaw to conduct distinguishing attacks and plaintext-recovery attacks via statistical analysis of timing data using crafted packets.

The bug was discovered 08/21/2018. The weakness was published 08/22/2018 by Amir as confirmed bug report (Bugzilla). It is possible to read the advisory at bugzilla.redhat.com. This vulnerability is uniquely identified as CVE-2018-10844 since 05/09/2018. The exploitability is told to be difficult. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1600 according to MITRE ATT&CK.

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†). Similar entries are available at VDB-102981, VDB-123136, VDB-123137 and VDB-132547. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

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License

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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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-2018-10844 (🔍)
GCVE (CVE): GCVE-0-2018-10844
GCVE (VulDB): GCVE-100-123135
SecurityFocus: 105138 - GnuTLS Multiple Information Disclosure Vulnerabilities

See also: 🔍

Entryinfo

Created: 08/23/2018 06:36
Updated: 05/04/2023 09:21
Changes: 08/23/2018 06:36 (76), 03/17/2020 15:06 (7), 05/04/2023 09:17 (4), 05/04/2023 09:21 (12)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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