CVE-2019-13115
libssh2 - security update
8.1
HIGH
CVSS 3.1
EPSS 42.4%
Description
In libssh2 before 1.9.0, kex_method_diffie_hellman_group_exchange_sha256_key_exchange in kex.c has an integer overflow that could lead to an out-of-bounds read in the way packets are read from the server. A remote attacker who compromises a SSH server may be able to disclose sensitive information or cause a denial of service condition on the client system when a user connects to the server. This is related to an _libssh2_check_length mistake, and is different from the various issues fixed in 1.8.1, such as CVE-2019-3855.
How to fix CVE-2019-13115
To remediate CVE-2019-13115, upgrade the affected package to a fixed version below.
- —upgrade to 1.9.0-r0 or later
- —upgrade to 1.9.0-1 or later
- —upgrade to 1.4.3-4.1+deb8u4 or later
- —upgrade to 1.7.0-1+deb9u2 or later
- —upgrade to 1.8.0-2.1+deb10u1 or later
Is CVE-2019-13115 being exploited?
Moderate — EPSS is 42.4%. Track this CVE but it's not at the top of the prioritisation list.
Affected packages (5)
- from 0, < 1.9.0-r0
- from 0, < 1.9.0-1
- from 0, < 1.4.3-4.1+deb8u4
- from 0, < 1.7.0-1+deb9u2
- from 0, < 1.8.0-2.1+deb10u1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH8.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H |