Medium: libssh2

Issue Overview:

In libssh2 v1.9.0 and earlier versions, the SSH_MSG_DISCONNECT logic in packet.c has an integer overflow in a bounds check, enabling an attacker to specify an arbitrary (out-of-bounds) offset for a subsequent memory read. A crafted SSH server may be able to disclose sensitive information or cause a denial of service condition on the client system when a user connects to the server. (CVE-2019-17498)

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.amzn2.2.3.aarch64  
    libssh2-devel-1.4.3-12.amzn2.2.3.aarch64  
    libssh2-debuginfo-1.4.3-12.amzn2.2.3.aarch64  
  
i686:  
    libssh2-1.4.3-12.amzn2.2.3.i686  
    libssh2-devel-1.4.3-12.amzn2.2.3.i686  
    libssh2-debuginfo-1.4.3-12.amzn2.2.3.i686  
  
noarch:  
    libssh2-docs-1.4.3-12.amzn2.2.3.noarch  
  
src:  
    libssh2-1.4.3-12.amzn2.2.3.src  
  
x86_64:  
    libssh2-1.4.3-12.amzn2.2.3.x86_64  
    libssh2-devel-1.4.3-12.amzn2.2.3.x86_64  
    libssh2-debuginfo-1.4.3-12.amzn2.2.3.x86_64  

Additional References

Red Hat: CVE-2019-17498

Mitre: CVE-2019-17498