Libgcrypt up to 1.8.2 Encoding cipher/elgamal.c cryptographic issue

CVSS Meta Temp Score
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CTI Interest Score
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6.4$0-$5k0.00

Summaryinfo

A vulnerability labeled as critical has been found in Libgcrypt up to 1.8.2. The affected element is an unknown function of the file cipher/elgamal.c of the component Encoding. Such manipulation leads to cryptographic issue. This vulnerability is documented as CVE-2018-6829. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability was found in Libgcrypt up to 1.8.2. It has been rated as critical. Affected by this issue is an unknown part of the file cipher/elgamal.c of the component Encoding. The manipulation with an unknown input leads to a cryptographic issue vulnerability. Using CWE to declare the problem leads to CWE-310. Impacted is confidentiality, integrity, and availability. CVE summarizes:

cipher/elgamal.c in Libgcrypt through 1.8.2, when used to encrypt messages directly, improperly encodes plaintexts, which allows attackers to obtain sensitive information by reading ciphertext data (i.e., it does not have semantic security in face of a ciphertext-only attack). The Decisional Diffie-Hellman (DDH) assumption does not hold for Libgcrypt's ElGamal implementation.

The bug was discovered 02/07/2018. The weakness was released 02/07/2018 (Website). The advisory is shared for download at github.com. This vulnerability is handled as CVE-2018-6829 since 02/07/2018. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1600.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Entry connected to this vulnerability is available at VDB-148704. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.4

VulDB Base Score: 5.3
VulDB Temp Score: 5.3
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: Cryptographic issue
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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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

02/07/2018 🔍
02/07/2018 +0 days 🔍
02/07/2018 +0 days 🔍
02/07/2018 +0 days 🔍
02/08/2018 +1 days 🔍
01/02/2020 +693 days 🔍

Sourcesinfo

Advisory: github.com
Status: Not defined

CVE: CVE-2018-6829 (🔍)
GCVE (CVE): GCVE-0-2018-6829
GCVE (VulDB): GCVE-100-112976
See also: 🔍

Entryinfo

Created: 02/08/2018 07:05
Updated: 01/02/2020 17:08
Changes: 02/08/2018 07:05 (57), 01/02/2020 17:08 (1)
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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