Out-of-bounds Write Affecting libssh2 package, versions <1.8.1-r0
Snyk CVSS
Attack Complexity
Low
User Interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Threat Intelligence
EPSS
0.33% (71st
percentile)
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Test your applications- Snyk ID SNYK-ALPINE37-LIBSSH2-467487
- published 22 Sep 2019
- disclosed 22 Sep 2019
- credit Unknown
How to fix?
Upgrade Alpine:3.7
libssh2
to version 1.8.1-r0 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream libssh2
package and not the libssh2
package as distributed by Alpine
.
See How to fix?
for Alpine:3.7
relevant fixed versions and status.
An integer overflow flaw, which could lead to an out of bounds write, was discovered in libssh2 before 1.8.1 in the way keyboard prompt requests are parsed. A remote attacker who compromises a SSH server may be able to execute code on the client system when a user connects to the server.
References
- https://seclists.org/bugtraq/2019/Apr/25
- https://www.debian.org/security/2019/dsa-4431
- 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://www.libssh2.org/CVE-2019-3856.html
- https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html
- https://security.netapp.com/advisory/ntap-20190327-0005/
- 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-2019:1652
- 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-2019-3856
- https://access.redhat.com/errata/RHSA-2019:0679
- https://access.redhat.com/errata/RHSA-2019:1175