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Fedora Update Notification
FEDORA-2019-3348cb4934
2019-04-05 01:54:23.968370
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Name : libssh2
Product : Fedora 28
Version : 1.8.1
Release : 1.fc28
URL : http://www.libssh2.org/
Summary : A library implementing the SSH2 protocol
Description :
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).

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Update Information:

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.
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ChangeLog:

* Tue Mar 19 2019 Paul Howarth <paul@city-fan.org> – 1.8.1-1
– Update to 1.8.1
– Fixed possible integer overflow when reading a specially crafted packet
(CVE-2019-3855)
– Fixed possible integer overflow in userauth_keyboard_interactive with a
number of extremely long prompt strings (CVE-2019-3863)
– Fixed possible integer overflow if the server sent an extremely large
number of keyboard prompts (CVE-2019-3856)
– Fixed possible out of bounds read when processing a specially crafted
packet (CVE-2019-3861)
– Fixed possible integer overflow when receiving a specially crafted exit
signal message channel packet (CVE-2019-3857)
– Fixed possible out of bounds read when receiving a specially crafted exit
status message channel packet (CVE-2019-3862)
– Fixed possible zero byte allocation when reading a specially crafted SFTP
packet (CVE-2019-3858)
– Fixed possible out of bounds reads when processing specially crafted SFTP
packets (CVE-2019-3860)
– Fixed possible out of bounds reads in _libssh2_packet_require(v)
(CVE-2019-3859)
– Fix mis-applied patch in the fix of CVE-2019-3859
– https://github.com/libssh2/libssh2/issues/325
– https://github.com/libssh2/libssh2/pull/327
* Mon Feb 4 2019 Paul Howarth <paul@city-fan.org> – 1.8.0-10
– Explicitly run the test suite in the en_US.UTF-8 locale to work around flaky
locale settings in mock builders
* Fri Feb 1 2019 Fedora Release Engineering <releng@fedoraproject.org> – 1.8.0-9
– Rebuilt for https://fedoraproject.org/wiki/Fedora_30_Mass_Rebuild
* Fri Jul 13 2018 Fedora Release Engineering <releng@fedoraproject.org> – 1.8.0-8
– Rebuilt for https://fedoraproject.org/wiki/Fedora_29_Mass_Rebuild
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References:

[ 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
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This update can be installed with the “dnf” update program. Use
su -c ‘dnf upgrade –advisory FEDORA-2019-3348cb4934’ at the command
line. For more information, refer to the dnf documentation available at
http://dnf.readthedocs.io/en/latest/command_ref.html#upgrade-command-label

All packages are signed with the Fedora Project GPG key. More details on the
GPG keys used by the Fedora Project can be found at
https://fedoraproject.org/keys
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