[SECURITY] [DLA 1730-3] libssh2 regression update

Package : libssh2
Version : 1.4.3-4.1+deb8u4
CVE ID : CVE-2019-3859 CVE-2019-13115

Various security problems have been additionally fixed in libssh2, an SSH
client implementation written in C++.

CVE-2019-3859

While investigating the impact of CVE-2019-13115 in Debian jessie's
version of libssh2, it was discovered that issues around
CVE-2019-3859 had not been fully resolved in Debian jessie's version
of libssh2. A thorough manual (read, analyze, and copy code changes
if needed) comparison of upstream code and code in Debian jessie's
version of libssh2 was done and various more boundary checks and
integer overflow protections got added to the package.

CVE-2019-13115

Kevin Backhouse from semmle.com discovered that initial fixes for the
CVE series CVE-2019-3855 - 2019-3863 introduced several regressions
about signedness of length return values into the upstream code.
While working on the CVE-2019-3859 update mentioned above, it was
paid attention to not introduce these upstream regression registered
as CVE-2019-13115.

For Debian 8 "Jessie", these problems have been fixed in version
1.4.3-4.1+deb8u4.

We recommend that you upgrade your libssh2 packages.

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS

–

mike gabriel aka sunweaver (Debian Developer)
fon: +49 (1520) 1976 148

GnuPG Fingerprint: 9BFB AEE8 6C0A A5FF BF22 0782 9AF4 6B30 2577 1B31
mail: [email protected], http://sunweavers.net

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