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CVE-2023-51767

OpenSSH through 9.6, when common types of DRAM are used, might allow row hammer attacks (for...

7.0 HighFix availableDisputed

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."

Attack profile

How easy it is to exploit

Attack vector
Local
Complexity
High
Privileges needed
Low
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
High
Availability
High

Exploit likelihood

0.66%Up 0.6 points since Dec 24, 2023
90%50%10%1%

What each source reports

NVD Score used 7.0

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."

Record
CVE-2023-51767
CVSS 3.1
7.0 HighCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
CVE List 7.0

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."

Record
CVE-2023-51767
CVSS 3.1
7.0 HighCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
EUVDEUVD-2023-56456 7.0

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."

Record
EUVD-2023-56456
CVSS 3.1
7.0 HighCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
GitHub AdvisoriesGHSA-27q9-h529-q4g3 7.0

OpenSSH through 9.6, when common types of DRAM are used, might allow row hammer attacks (for...

OpenSSH through 9.6, 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.

Record
GHSA-27q9-h529-q4g3
CVSS 3.1
7.0 HighCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVALPINE-CVE-2023-51767 7.0

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."

Record
ALPINE-CVE-2023-51767
CVSS 3.1
7.0 HighCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSV 7.0

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."

Record
CVE-2023-51767
CVSS 3.1
7.0 HighCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
Show 4 moreShow less
OSVRHSA-2026:9221 7.0

Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

Record
RHSA-2026:9221
CVSS 3.1
7.0 HighCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVROOT-OS-DEBIAN-11-CVE-2023-51767 7.0

CVE-2023-51767 in openssh - Patched by Root

Root has patched CVE-2023-51767 in the openssh package for Root:Debian:11. Multiple fixed versions available.

Record
ROOT-OS-DEBIAN-11-CVE-2023-51767
CVSS 3.1
7.0 HighCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVROOT-OS-DEBIAN-12-CVE-2023-51767 7.0

CVE-2023-51767 in openssh - Patched by Root

Root has patched CVE-2023-51767 in the openssh package for Root:Debian:12. Multiple fixed versions available.

Record
ROOT-OS-DEBIAN-12-CVE-2023-51767
CVSS 3.1
7.0 HighCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVUBUNTU-CVE-2023-51767 7.0

OpenSSH through 9.6, 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.

Record
UBUNTU-CVE-2023-51767
CVSS 3.1
7.0 HighCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
openssh
Alpine:v3.19
before 9.7_p1-r0
9.7_p1-r0
openssh
Alpine:v3.20
before 9.7_p1-r0
9.7_p1-r0
openssh
Alpine:v3.21
before 9.7_p1-r0
9.7_p1-r0
openssh
Alpine:v3.22
before 9.7_p1-r0
9.7_p1-r0
openssh
Alpine:v3.23
before 9.7_p1-r0
9.7_p1-r0
openssh
Alpine:v3.24
before 9.7_p1-r0
9.7_p1-r0
openssh
Root:Debian:11
before 1:8.4p1-5+deb11u7.root.io.9
1:8.4p1-5+deb11u7.root.io.91:8.4p1-5+deb11u7.aikido.101:8.4p1-5+deb11u7.aikido.11
rootio-openssh
Root:Debian:11
before 1:8.4p1-5+deb11u7.root.io.9
1:8.4p1-5+deb11u7.root.io.91:8.4p1-5+deb11u7.aikido.101:8.4p1-5+deb11u7.aikido.11
openssh
Root:Debian:12
before 1:9.2p1-2+deb12u10.root.io.11
1:9.2p1-2+deb12u10.root.io.111:9.2p1-2+deb12u10.aikido.141:9.2p1-2+deb12u10.root.io.131:9.2p1-2+deb12u10.root.io.121:9.2p1-2+deb12u10.aikido.151:9.2p1-2+deb12u10.aikido.16
rootio-openssh
Root:Debian:12
before 1:9.2p1-2+deb12u10.root.io.11
1:9.2p1-2+deb12u10.root.io.111:9.2p1-2+deb12u10.aikido.141:9.2p1-2+deb12u10.root.io.131:9.2p1-2+deb12u10.root.io.121:9.2p1-2+deb12u10.aikido.151:9.2p1-2+deb12u10.aikido.16

History

History
RecordedChangedSources
affected
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2023-51767 is a high vulnerability (CVSS 7.0) in Openbsd Openssh, published December 24, 2023. Its validity is disputed. EPSS puts the chance of exploitation in the next 30 days at 0.66%, the 51st percentile. Fixed in openssh 9.7_p1-r0.

References

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