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osvGoogleOSV:ALSA-2023:6643
HistoryNov 07, 2023 - 12:00 a.m.

Moderate: libssh security update

2023-11-0700:00:00
Google
osv.dev
11
libssh
security update
ssh protocol
client
server
cve-2023-1667
cve-2023-2283
authorization bypass
rekeying
algorithm guessing
cvss score
almalinux
release notes

6.5 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

LOW

Integrity Impact

LOW

Availability Impact

NONE

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

6.6 Medium

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

48.7%

libssh is a library which implements the SSH protocol. It can be used to implement client and server applications.

Security Fix(es):

  • libssh: NULL pointer dereference during rekeying with algorithm guessing (CVE-2023-1667)
  • libssh: authorization bypass in pki_verify_data_signature (CVE-2023-2283)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Additional Changes:

For detailed information on changes in this release, see the AlmaLinux Release Notes linked from the References section.

6.5 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

LOW

Integrity Impact

LOW

Availability Impact

NONE

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

6.6 Medium

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

48.7%