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amazonAmazonALAS-2023-1756
HistoryMay 25, 2023 - 5:41 p.m.

Medium: libssh2

2023-05-2517:41:00
alas.aws.amazon.com
6

9.1 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

6.4 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

PARTIAL

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

0.046 Low

EPSS

Percentile

92.5%

JSON

Issue Overview:

An out of bounds read flaw was discovered in libssh2 before 1.8.1 in the _libssh2_packet_require and _libssh2_packet_requirev functions. A remote attacker who compromises a SSH server may be able to cause a Denial of Service or read data in the client memory. (CVE-2019-3859)

An out of bounds read flaw was discovered in libssh2 before 1.8.1 in the way SFTP packets with empty payloads are parsed. A remote attacker who compromises a SSH server may be able to cause a Denial of Service or read data in the client memory. (CVE-2019-3860)

Affected Packages:

libssh2

Issue Correction:
Run yum update libssh2 to update your system.

New Packages:

i686:  
    libssh2-debuginfo-1.4.2-3.13.amzn1.i686  
    libssh2-devel-1.4.2-3.13.amzn1.i686  
    libssh2-1.4.2-3.13.amzn1.i686  
    libssh2-docs-1.4.2-3.13.amzn1.i686  
  
src:  
    libssh2-1.4.2-3.13.amzn1.src  
  
x86_64:  
    libssh2-1.4.2-3.13.amzn1.x86_64  
    libssh2-debuginfo-1.4.2-3.13.amzn1.x86_64  
    libssh2-docs-1.4.2-3.13.amzn1.x86_64  
    libssh2-devel-1.4.2-3.13.amzn1.x86_64

Additional References

Red Hat: CVE-2019-3859, CVE-2019-3860

Mitre: CVE-2019-3859, CVE-2019-3860

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9.1 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

6.4 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

PARTIAL

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

0.046 Low

EPSS

Percentile

92.5%

JSON
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