Amazon Linux 2 Security Advisory: ALAS-2020-1531
Advisory Release Date: 2020-10-22 18:19 Pacific
Advisory Updated Date: 2020-10-22 22:35 Pacific
Severity:
Medium
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