CVE-2019-3857: Integer Overflow
First published: Mon Mar 11 2019(Updated: )
A server could send a SSH_MSG_CHANNEL_REQUEST packet with an exit signal message with a length of max unsigned integer value. The length would then have a value of 1 added to it and used to allocate memory causing a possible memory write out of bounds error or zero byte allocation.
Credit: secalert@redhat.com secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| debian/libssh2 | 1.8.0-2.1 1.8.0-2.1+deb10u1 1.9.0-2 1.10.0-3 1.11.0-2 | |
| redhat/libssh2 | <1.8.1 | 1.8.1 |
| Oracle Libssh2 | >=1.2.8<=1.8.0 | |
| Debian Linux | =8.0 | |
| Debian Linux | =9.0 | |
| NetApp ONTAP Select Deploy | ||
| SUSE Linux | =15.0 | |
| SUSE Linux | =42.3 | |
| Red Hat Enterprise Linux | =8.0 | |
| Red Hat Enterprise Linux Desktop | =7.0 | |
| Red Hat Enterprise Linux Server | =7.0 | |
| Red Hat Enterprise Linux Server | =7.6 | |
| Red Hat Enterprise Linux Server | =7.6 | |
| Red Hat Enterprise Linux Server | =7.6 | |
| Red Hat Enterprise Linux Workstation | =7.0 | |
| Red Hat Fedora | =28 | |
| Oracle PeopleTools | =8.56 | |
| Oracle PeopleTools | =8.57 |
Never miss a vulnerability like this again
Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.
Reference Links
- https://www.libssh2.org/CVE-2019-3857.html
- https://libssh2.org/1.8.0-CVE/CVE-2019-3857.patch
- https://github.com/libssh2/libssh2/pull/315
- https://security-tracker.debian.org/tracker/CVE-2019-3857
- http://lists.opensuse.org/opensuse-security-announce/2019-03/msg00040.html
- http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00003.html
- https://access.redhat.com/errata/RHSA-2019:0679
- https://access.redhat.com/errata/RHSA-2019:1175
- https://access.redhat.com/errata/RHSA-2019:1652
- https://access.redhat.com/errata/RHSA-2019:1791
- https://access.redhat.com/errata/RHSA-2019:1943
- https://access.redhat.com/errata/RHSA-2019:2399
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3857
- https://lists.debian.org/debian-lts-announce/2019/03/msg00032.html
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/5DK6VO2CEUTAJFYIKWNZKEKYMYR3NO2O/
- https://seclists.org/bugtraq/2019/Apr/25
- https://security.netapp.com/advisory/ntap-20190327-0005/
- https://www.debian.org/security/2019/dsa-4431
- https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html
- https://github.com/libssh2/libssh2/commit/dc109a7f518757741590bb993c0c8412928ccec2
- https://www.openwall.com/lists/oss-security/2019/03/18/3
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1690246
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1690247
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1690248
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1690408
- https://bugzilla.redhat.com/show_bug.cgi?id=1687305
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5DK6VO2CEUTAJFYIKWNZKEKYMYR3NO2O/
Frequently Asked Questions
What is CVE-2019-3857?
CVE-2019-3857 is an integer overflow vulnerability discovered in libssh2 before 1.8.1.
What is the severity of CVE-2019-3857?
CVE-2019-3857 has a severity level of 8.8 (high).
How does CVE-2019-3857 impact the affected software?
CVE-2019-3857 could lead to an out of bounds write in the way SSH_MSG_CHANNEL_REQUEST packets with an exit signal are parsed, potentially allowing a remote attacker to execute code on the client system.
Which versions of libssh2 are affected by CVE-2019-3857?
Versions of libssh2 before 1.8.1 are affected by CVE-2019-3857.
How can I fix CVE-2019-3857?
To fix CVE-2019-3857, you should update libssh2 to version 1.8.1 or later.
- collector/security-tracker-debian
- agent/type
- agent/first-publish-date
- agent/remedy
- collector/redhat-bugzilla
- source/Red Hat
- alias/CVE-2019-3857
- agent/software-canonical-lookup
- collector/mitre-cve
- source/MITRE
- agent/weakness
- agent/references
- agent/severity
- agent/description
- agent/author
- agent/last-modified-date
- agent/event
- agent/source
- collector/nvd-api
- source/NVD
- agent/software-canonical-lookup-request
- agent/tags
- agent/softwarecombine
- collector/nvd-index
- package-manager/debian
- package-manager/redhat
- vendor/libssh2
- canonical/oracle libssh2
- version/oracle libssh2/1.2.8
- version/oracle libssh2/1.8.0
- vendor/debian
- canonical/debian linux
- version/debian linux/8.0
- version/debian linux/9.0
- vendor/netapp
- canonical/netapp ontap select deploy
- vendor/opensuse
- canonical/suse linux
- version/suse linux/15.0
- version/suse linux/42.3
- vendor/redhat
- canonical/red hat enterprise linux
- version/red hat enterprise linux/8.0
- canonical/red hat enterprise linux desktop
- version/red hat enterprise linux desktop/7.0
- canonical/red hat enterprise linux server
- version/red hat enterprise linux server/7.0
- version/red hat enterprise linux server/7.6
- canonical/red hat enterprise linux workstation
- version/red hat enterprise linux workstation/7.0
- vendor/fedoraproject
- canonical/red hat fedora
- version/red hat fedora/28
- vendor/oracle
- canonical/oracle peopletools
- version/oracle peopletools/8.56
- version/oracle peopletools/8.57