RedHat: RHSA-2020-4545:01 Moderate: libssh security, bug fix,
Summary
libssh is a library which implements the SSH protocol. It can be used to
implement client and server applications.
The following packages have been upgraded to a later upstream version:
libssh (0.9.4). (BZ#1804797)
Security Fix(es):
* libssh: denial of service when handling AES-CTR (or DES) ciphers(CVE-2020-1730)
* libssh: unsanitized location in scp could lead to unwanted command
execution (CVE-2019-14889)
For more details about the security issue(s), including the impact, a CVSS
score, acknowledgments, and other related information, refer to the CVE
page(s) listed in the References section.
Additional Changes:
For detailed information on changes in this release, see the Red Hat
Enterprise Linux 8.3 Release Notes linked from the References section.
Summary
Solution
For details on how to apply this update, which includes the changes
described in this advisory, refer to:
https://access.redhat.com/articles/11258
After installing these updated packages, all running applications using
libssh must be restarted for this update to take effect.
References
https://access.redhat.com/security/cve/CVE-2019-14889 https://access.redhat.com/security/cve/CVE-2020-1730 https://access.redhat.com/security/updates/classification/#moderate https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/8.3_release_notes/
Package List
Red Hat Enterprise Linux AppStream (v. 8):
aarch64:
libssh-debuginfo-0.9.4-2.el8.aarch64.rpm
libssh-debugsource-0.9.4-2.el8.aarch64.rpm
libssh-devel-0.9.4-2.el8.aarch64.rpm
ppc64le:
libssh-debuginfo-0.9.4-2.el8.ppc64le.rpm
libssh-debugsource-0.9.4-2.el8.ppc64le.rpm
libssh-devel-0.9.4-2.el8.ppc64le.rpm
s390x:
libssh-debuginfo-0.9.4-2.el8.s390x.rpm
libssh-debugsource-0.9.4-2.el8.s390x.rpm
libssh-devel-0.9.4-2.el8.s390x.rpm
x86_64:
libssh-debuginfo-0.9.4-2.el8.i686.rpm
libssh-debuginfo-0.9.4-2.el8.x86_64.rpm
libssh-debugsource-0.9.4-2.el8.i686.rpm
libssh-debugsource-0.9.4-2.el8.x86_64.rpm
libssh-devel-0.9.4-2.el8.i686.rpm
libssh-devel-0.9.4-2.el8.x86_64.rpm
Red Hat Enterprise Linux BaseOS (v. 8):
Source:
libssh-0.9.4-2.el8.src.rpm
aarch64:
libssh-0.9.4-2.el8.aarch64.rpm
libssh-debuginfo-0.9.4-2.el8.aarch64.rpm
libssh-debugsource-0.9.4-2.el8.aarch64.rpm
noarch:
libssh-config-0.9.4-2.el8.noarch.rpm
ppc64le:
libssh-0.9.4-2.el8.ppc64le.rpm
libssh-debuginfo-0.9.4-2.el8.ppc64le.rpm
libssh-debugsource-0.9.4-2.el8.ppc64le.rpm
s390x:
libssh-0.9.4-2.el8.s390x.rpm
libssh-debuginfo-0.9.4-2.el8.s390x.rpm
libssh-debugsource-0.9.4-2.el8.s390x.rpm
x86_64:
libssh-0.9.4-2.el8.i686.rpm
libssh-0.9.4-2.el8.x86_64.rpm
libssh-debuginfo-0.9.4-2.el8.i686.rpm
libssh-debuginfo-0.9.4-2.el8.x86_64.rpm
libssh-debugsource-0.9.4-2.el8.i686.rpm
libssh-debugsource-0.9.4-2.el8.x86_64.rpm
These packages are GPG signed by Red Hat for security. Our key and
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/
Topic
An update for libssh is now available for Red Hat Enterprise Linux 8.Red Hat Product Security has rated this update as having a security impactof Moderate. A Common Vulnerability Scoring System (CVSS) base score, whichgives a detailed severity rating, is available for each vulnerability fromthe CVE link(s) in the References section.
Topic
Relevant Releases Architectures
Red Hat Enterprise Linux AppStream (v. 8) - aarch64, ppc64le, s390x, x86_64
Red Hat Enterprise Linux BaseOS (v. 8) - aarch64, noarch, ppc64le, s390x, x86_64
Bugs Fixed
1733914 - No $HOME/.config dir created if connect libvirtd with libssh
1772523 - CVE-2019-14889 libssh: unsanitized location in scp could lead to unwanted command execution
1801998 - CVE-2020-1730 libssh: denial of service when handling AES-CTR (or DES) ciphers1804797 - Rebase libssh to the latest upstream version
1821339 - libssh based server automatically tries to load OpenSSH server configuration
1849071 - libssh ssh_channel_read() randomly returns error