Vulmon
Amazon Linux AMI Security Advisory: ALAS-2019-1254
Advisory Release Date: 2019-08-12 18:05 Pacific
Advisory Updated Date: 2019-08-12 18:11 Pacific
An integer overflow flaw which could lead to an out of bounds write was discovered in libssh4 in the way packets are read from the server. A remote attacker who compromises a SSH server may be able to execute code on the client system when a user connects to the server.(CVE-2019-3855)
An integer overflow flaw which could lead to an out of bounds write was discovered in libssh4 in the way SSH_MSG_CHANNEL_REQUEST packets with an exit signal are parsed. A remote attacker who compromises a SSH server may be able to execute code on the client system when a user connects to the server.(CVE-2019-3857)
An integer overflow flaw, which could lead to an out of bounds write, was discovered in libssh4 in the way keyboard prompt requests are parsed. A remote attacker who compromises a SSH server may be able to execute code on the client system when a user connects to the server.(CVE-2019-3856)
A flaw was found in libssh4 before 1.8.1. A server could send a multiple keyboard interactive response messages whose total length are greater than unsigned char max characters. This value is used as an index to copy memory causing in an out of bounds memory write error.(CVE-2019-3863)
Affected Packages:
libssh4
Issue Correction:
Run yum update libssh4 to update your system.
i686:
libssh4-1.4.2-3.12.amzn1.i686
libssh4-debuginfo-1.4.2-3.12.amzn1.i686
libssh4-devel-1.4.2-3.12.amzn1.i686
libssh4-docs-1.4.2-3.12.amzn1.i686
src:
libssh4-1.4.2-3.12.amzn1.src
x86_64:
libssh4-devel-1.4.2-3.12.amzn1.x86_64
libssh4-docs-1.4.2-3.12.amzn1.x86_64
libssh4-1.4.2-3.12.amzn1.x86_64
libssh4-debuginfo-1.4.2-3.12.amzn1.x86_64