Fedora 30: FEDORA-2019-70a9d4f970 Moderate: libssh2 Memory Overflow

libssh2 is a library implementing the SSH2 protocol as defined by

Internet Drafts: SECSH-TRANS(22), SECSH-USERAUTH(25),

SECSH-CONNECTION(23), SECSH-ARCH(20), SECSH-FILEXFER(06)*,

SECSH-DHGEX(04), and SECSH-NUMBERS(10).

This update addresses various overflow conditions that could result in possible

memory read/write out of bounds errors or zero byte allocations when connected

to a malicious server.

[ 1 ] Bug #1687313 - CVE-2019-3863 libssh2: Integer overflow in user authenticate keyboard interactive allows out-of-bounds writes

https://bugzilla.redhat.com/show_bug.cgi?id=1687313

[ 2 ] Bug #1687312 - CVE-2019-3862 libssh2: Out-of-bounds memory comparison with specially crafted message channel request

https://bugzilla.redhat.com/show_bug.cgi?id=1687312

[ 3 ] Bug #1687311 - CVE-2019-3861 libssh2: Out-of-bounds reads with specially crafted SSH packets

https://bugzilla.redhat.com/show_bug.cgi?id=1687311

[ 4 ] Bug #1687310 - CVE-2019-3860 libssh2: Out-of-bounds reads with specially crafted SFTP packets

https://bugzilla.redhat.com/show_bug.cgi?id=1687310

[ 5 ] Bug #1687307 - CVE-2019-3859 libssh2: Unchecked use of _libssh2_packet_require and _libssh2_packet_requirev resulting in out-of-bounds read

https://bugzilla.redhat.com/show_bug.cgi?id=1687307

[ 6 ] Bug #1687306 - CVE-2019-3858 libssh2: Zero-byte allocation with a specially crafted SFTP packed leading to an out-of-bounds read

https://bugzilla.redhat.com/show_bug.cgi?id=1687306

[ 7 ] Bug #1687305 - CVE-2019-3857 libssh2: Integer overflow in SSH packet processing channel resulting in out of bounds write

https://bugzilla.redhat.com/show_bug.cgi?id=1687305

[ 8 ] Bug #1687304 - CVE-2019-3856 libssh2: Integer overflow in keyboard interactive handling resulting in out of bounds write

https://bugzilla.redhat.com/show_bug.cgi?id=1687304

[ 9 ] Bug #1687303 - CVE-2019-3855 libssh2: Integer overflow in transport read resulting in out of bounds write

https://bugzilla.redhat.com/show_bug.cgi?id=1687303

su -c 'dnf upgrade --advisory FEDORA-2019-70a9d4f970' at the command

line. For more information, refer to the dnf documentation available at

https://dnf.readthedocs.io/en/latest/command_ref.html

All packages are signed with the Fedora Project GPG key. More details on the

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https://fedoraproject.org/security/

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