Medium: libssh2

Issue Overview:

An out of bounds read flaw was discovered in libssh2 when a specially crafted SFTP packet is received from the server. 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-2019-3858)

An out of bounds read flaw was discovered in libssh2 in the way SSH packets with a padding length value greater than the packet length 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-2019-3861)

Affected Packages:

libssh2

Note:

This advisory is applicable to Amazon Linux 2 (AL2) Core repository. Visit this FAQ section for the difference between AL2 Core and AL2 Extras advisories.

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

New Packages:

aarch64:  
    libssh2-1.4.3-12.amzn2.2.1.aarch64  
    libssh2-devel-1.4.3-12.amzn2.2.1.aarch64  
    libssh2-debuginfo-1.4.3-12.amzn2.2.1.aarch64  
  
i686:  
    libssh2-1.4.3-12.amzn2.2.1.i686  
    libssh2-devel-1.4.3-12.amzn2.2.1.i686  
    libssh2-debuginfo-1.4.3-12.amzn2.2.1.i686  
  
noarch:  
    libssh2-docs-1.4.3-12.amzn2.2.1.noarch  
  
src:  
    libssh2-1.4.3-12.amzn2.2.1.src  
  
x86_64:  
    libssh2-1.4.3-12.amzn2.2.1.x86_64  
    libssh2-devel-1.4.3-12.amzn2.2.1.x86_64  
    libssh2-debuginfo-1.4.3-12.amzn2.2.1.x86_64  

Additional References

Red Hat: CVE-2019-3858, CVE-2019-3861

Mitre: CVE-2019-3858, CVE-2019-3861