Lucene search

K
debiancveDebian Security Bug TrackerDEBIANCVE:CVE-2023-6918
HistoryDec 19, 2023 - 12:15 a.m.

CVE-2023-6918

2023-12-1900:15:08
Debian Security Bug Tracker
security-tracker.debian.org
24
libssh
message digest
crypto backends
low-memory
null dereferences
crashes
uninitialized memory
kdf
decryption
integrity
connection termination
unix

5.3 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

LOW

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

4.6 Medium

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

35.1%

A flaw was found in the libssh implements abstract layer for message digest (MD) operations implemented by different supported crypto backends. The return values from these were not properly checked, which could cause low-memory situations failures, NULL dereferences, crashes, or usage of the uninitialized memory as an input for the KDF. In this case, non-matching keys will result in decryption/integrity failures, terminating the connection.

5.3 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

LOW

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

4.6 Medium

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

35.1%