High severity · published Dec 24, 2023
CVE-2023-51767
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…
7.0
CVSS
0.7%
EPSS
No
On KEV
Description
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."
CVSS vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
High
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.7% · higher than 51% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
EL
Enterprise Linux · Redhat
8.0; 9.0 · source: NVD
FE
Fedora · Fedoraproject
39 · source: NVD
OP
Openssh · Openbsd
All versions, or not specified · source: NVD
SS
SIMATIC S7-1500 TM MFP - GNU/Linux subsystem · Siemens
before V1.1 · source: CISA
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-51767
CVE.org
https://www.cve.org/CVERecord?id=CVE-2023-51767
Third Party Advisory
https://access.redhat.com/security/cve/CVE-2023-51767
Technical Description
https://arxiv.org/abs/2309.02545
Issue Tracking
https://bugzilla.redhat.com/show_bug.cgi?id=2255850
Product
https://github.com/openssh/openssh-portable/blob/8241b9c0529228b4b86d88b1a6076fb9f97e4a99/auth-passwd.c#L77
Product
https://github.com/openssh/openssh-portable/blob/8241b9c0529228b4b86d88b1a6076fb9f97e4a99/monitor.c#L878
Third Party Advisory
https://security.netapp.com/advisory/ntap-20240125-0006/
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