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amazonAmazonALAS-2023-1794
HistoryAug 03, 2023 - 8:16 p.m.

Medium: openssh

2023-08-0320:16:00
alas.aws.amazon.com
61
openssh
7.4
verification
file names
relative paths
amazon linux
update
cve-2023-35812

CVSS2

5.8

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:N/AC:M/Au:N/C:N/I:P/A:P

CVSS3

5.9

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

HIGH

Availability Impact

NONE

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

EPSS

0.002

Percentile

54.2%

JSON

Issue Overview:

An issue was discovered in OpenSSH 7.4 on Amazon Linux 2 and Amazon Linux 1. The fix for CVE-2019-6111 only covered cases where an absolute path is passed to scp. When a relative path is used there is no verification that the name of a file received by the client matches the file requested. (CVE-2023-35812)

Affected Packages:

openssh

Issue Correction:
Run yum update openssh to update your system.

New Packages:

i686:  
    openssh-clients-7.4p1-22.78.amzn1.i686  
    openssh-debuginfo-7.4p1-22.78.amzn1.i686  
    openssh-keycat-7.4p1-22.78.amzn1.i686  
    openssh-ldap-7.4p1-22.78.amzn1.i686  
    openssh-server-7.4p1-22.78.amzn1.i686  
    openssh-cavs-7.4p1-22.78.amzn1.i686  
    pam_ssh_agent_auth-0.10.3-2.22.78.amzn1.i686  
    openssh-7.4p1-22.78.amzn1.i686  
  
src:  
    openssh-7.4p1-22.78.amzn1.src  
  
x86_64:  
    openssh-server-7.4p1-22.78.amzn1.x86_64  
    openssh-7.4p1-22.78.amzn1.x86_64  
    pam_ssh_agent_auth-0.10.3-2.22.78.amzn1.x86_64  
    openssh-ldap-7.4p1-22.78.amzn1.x86_64  
    openssh-clients-7.4p1-22.78.amzn1.x86_64  
    openssh-cavs-7.4p1-22.78.amzn1.x86_64  
    openssh-debuginfo-7.4p1-22.78.amzn1.x86_64  
    openssh-keycat-7.4p1-22.78.amzn1.x86_64

Additional References

Red Hat: CVE-2023-35812

Mitre: CVE-2023-35812

OSVersionArchitecturePackageVersionFilename
Amazon Linux1i686openssh-clients< 7.4p1-22.78.amzn1openssh-clients-7.4p1-22.78.amzn1.i686.rpm
Amazon Linux1i686openssh-debuginfo< 7.4p1-22.78.amzn1openssh-debuginfo-7.4p1-22.78.amzn1.i686.rpm
Amazon Linux1i686openssh-keycat< 7.4p1-22.78.amzn1openssh-keycat-7.4p1-22.78.amzn1.i686.rpm
Amazon Linux1i686openssh-ldap< 7.4p1-22.78.amzn1openssh-ldap-7.4p1-22.78.amzn1.i686.rpm
Amazon Linux1i686openssh-server< 7.4p1-22.78.amzn1openssh-server-7.4p1-22.78.amzn1.i686.rpm
Amazon Linux1i686openssh-cavs< 7.4p1-22.78.amzn1openssh-cavs-7.4p1-22.78.amzn1.i686.rpm
Amazon Linux1i686pam_ssh_agent_auth< 0.10.3-2.22.78.amzn1pam_ssh_agent_auth-0.10.3-2.22.78.amzn1.i686.rpm
Amazon Linux1i686openssh< 7.4p1-22.78.amzn1openssh-7.4p1-22.78.amzn1.i686.rpm
Amazon Linux1x86_64openssh-server< 7.4p1-22.78.amzn1openssh-server-7.4p1-22.78.amzn1.x86_64.rpm
Amazon Linux1x86_64openssh< 7.4p1-22.78.amzn1openssh-7.4p1-22.78.amzn1.x86_64.rpm
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CVSS2

5.8

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:N/AC:M/Au:N/C:N/I:P/A:P

CVSS3

5.9

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

HIGH

Availability Impact

NONE

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

EPSS

0.002

Percentile

54.2%

JSON
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