GnuTLS Crafted Packet Lucky Thirteen cryptographic issue

CVSS Meta Temp Score
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CTI Interest Score
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5.3$0-$5k0.00

Summaryinfo

A vulnerability was found in GnuTLS. It has been rated as critical. This vulnerability affects unknown code. The manipulation as part of Crafted Packet leads to cryptographic issue (Lucky Thirteen). This vulnerability is uniquely identified as CVE-2018-10846. Local access is required to approach this attack. No exploit exists. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in GnuTLS (Network Encryption Software) (version unknown). It has been rated as critical. This issue affects an unknown function. The manipulation as part of a Crafted Packet leads to a cryptographic issue vulnerability (Lucky Thirteen). Using CWE to declare the problem leads to CWE-310. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

A cache-based side channel in GnuTLS implementation that leads to plain text recovery in cross-VM attack setting was found. An attacker could use a combination of "Just in Time" Prime+probe attack in combination with Lucky-13 attack to recover plain text using crafted packets.

The bug was discovered 08/21/2018. The weakness was disclosed 08/22/2018 by Amir as confirmed bug report (Bugzilla). The advisory is shared at bugzilla.redhat.com. The identification of this vulnerability is CVE-2018-10846 since 05/09/2018. An attack has to be approached locally. No form of authentication is needed for a successful exploitation. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1600 for this issue.

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†). The entries VDB-102981, VDB-123135, VDB-123136 and VDB-132547 are pretty similar. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

Name

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.4
VulDB Meta Temp Score: 5.3

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.6
NVD Vector: 🔍

CNA Base Score: 5.3
CNA Vector (Red Hat, Inc.): 🔍

CVSSv2info

AVACAuCIA
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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: Partially
Local: Yes
Remote: Partially

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-2018-10846 (🔍)
GCVE (CVE): GCVE-0-2018-10846
GCVE (VulDB): GCVE-100-123137
SecurityFocus: 105138 - GnuTLS Multiple Information Disclosure Vulnerabilities

See also: 🔍

Entryinfo

Created: 08/23/2018 06:38
Updated: 05/04/2023 09:28
Changes: 08/23/2018 06:38 (75), 03/17/2020 15:12 (7), 05/04/2023 09:26 (4), 05/04/2023 09:28 (10)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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