OpenSSH up to 9.6 DRAM mm_answer_authpassword Rowhammer improper authentication

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.5$5k-$25k0.00

Summaryinfo

A vulnerability identified as critical has been detected in OpenSSH up to 9.6. This affects an unknown part of the component DRAM Handler. Performing a manipulation of the argument mm_answer_authpassword results in improper authentication. This vulnerability was named CVE-2023-51767. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability, which was classified as critical, was found in OpenSSH up to 9.6 (Connectivity Software). This affects some unknown functionality of the component DRAM Handler. The manipulation of the argument mm_answer_authpassword with an unknown input leads to a improper authentication vulnerability. CWE is classifying the issue as CWE-287. When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

OpenSSH through 10.0, when common types of DRAM are used, might allow row hammer attacks (for authentication bypass) because the integer value of authenticated in mm_answer_authpassword does not resist flips of a single bit. NOTE: this is applicable to a certain threat model of attacker-victim co-location in which the attacker has user privileges. NOTE: this is disputed by the Supplier, who states "we do not consider it to be the application's responsibility to defend against platform architectural weaknesses."

The weakness was presented 12/24/2023. It is possible to read the advisory at arxiv.org. This vulnerability is uniquely identified as CVE-2023-51767 since 12/24/2023. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 06/02/2026).

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

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

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 6.5

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

NVD Base Score: 7.0
NVD Vector: 🔍

ADP CISA Base Score: 7.0
ADP CISA Vector: 🔍

CVSSv2info

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

Exploitinginfo

Class: Improper authentication
CWE: CWE-287
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
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

12/24/2023 🔍
12/24/2023 +0 days 🔍
12/24/2023 +0 days 🔍
06/02/2026 +891 days 🔍

Sourcesinfo

Advisory: arxiv.org
Status: Not defined

CVE: CVE-2023-51767 (🔍)
GCVE (CVE): GCVE-0-2023-51767
GCVE (VulDB): GCVE-100-248943

Entryinfo

Created: 12/24/2023 09:37
Updated: 06/02/2026 18:38
Changes: 12/24/2023 09:37 (40), 01/18/2024 16:24 (11), 09/22/2025 19:49 (16), 11/06/2025 22:21 (1), 06/02/2026 18:38 (11)
Complete: 🔍
Cache ID: 216::103

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