CVE-2019-3863
High
Description
A flaw was found in libssh2 before 1.8.1 creating a vulnerability on the SSH client side. A server could send a multiple keyboard interactive response messages whose total length are greater than unsigned char max characters. This value is used by the SSH client as an index to copy memory causing in an out of bounds memory write error.
SeverityHigh
CVSS7.5
Exploit probability—
Product
Libssh2
PublishedMar 25, 2019
First seenMar 25, 2019
Weakness typeCWE-190Integer overflowCWE-787Out-of-bounds write
How to fix
Update
- libssh2 libssh21.8.1 or later
Vendor advisories
- access.redhat.com/errata/RHSA-2019:0679
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5DK6VO2CEUTAJFYIKWNZKEKYMYR3NO2O/
- debian.org/security/2019/dsa-4431
- access.redhat.com/errata/RHSA-2019:1175
- access.redhat.com/errata/RHSA-2019:1652
- access.redhat.com/errata/RHSA-2019:1791
- access.redhat.com/errata/RHSA-2019:1943
- access.redhat.com/errata/RHSA-2019:2399
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| libssh2 libssh2 | v < 1.8.1 | 1.8.1 |
| debian debian_linux | 8.0 | — |
| netapp ontap_select_deploy_administration_utility | No range specified | — |
| opensuse leap | 15.0, 42.3 | — |
| redhat enterprise_linux_desktop | 7.0 | — |
| redhat enterprise_linux_server | 7.0 | — |
| redhat enterprise_linux_server_aus | 7.6 | — |
| redhat enterprise_linux_server_eus | 7.6 | — |
| redhat enterprise_linux_server_tus | 7.6 | — |
| redhat enterprise_linux_workstation | 7.0 | — |
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