8.1 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H
5.8 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:P/I:N/A:P
0.004 Low
EPSS
Percentile
73.5%
Debian LTS Advisory DLA-2848-1 [email protected]
https://www.debian.org/lts/security/ Anton Gladky
December 17, 2021 https://wiki.debian.org/LTS
Package : libssh2
Version : 1.7.0-1+deb9u2
CVE ID : CVE-2019-13115 CVE-2019-17498
Two issues have been discovered in libssh2, a client-side C library implementing
the SSH2 protocol:
CVE-2019-13115:
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.
CVE-2019-17498:
SSH_MSG_DISCONNECT logic in packet.c has an integer overflow in a bounds check,
enabling an attacker to specify an arbitrary (out-of-bounds) offset for a
subsequent memory read. A crafted 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.
For Debian 9 stretch, these problems have been fixed in version
1.7.0-1+deb9u2.
We recommend that you upgrade your libssh2 packages.
For the detailed security status of libssh2 please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/libssh2
Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
Debian | 8 | all | libssh2 | < 1.4.3-4.1+deb8u6 | libssh2_1.4.3-4.1+deb8u6_all.deb |
Debian | 10 | amd64 | libssh2-1-dev | < 1.8.0-2.1+deb10u1 | libssh2-1-dev_1.8.0-2.1+deb10u1_amd64.deb |
Debian | 9 | armel | libssh2-1-dbg | < 1.7.0-1+deb9u2 | libssh2-1-dbg_1.7.0-1+deb9u2_armel.deb |
Debian | 8 | armel | libssh2-1 | < 1.4.3-4.1+deb8u6 | libssh2-1_1.4.3-4.1+deb8u6_armel.deb |
Debian | 9 | arm64 | libssh2-1 | < 1.7.0-1+deb9u2 | libssh2-1_1.7.0-1+deb9u2_arm64.deb |
Debian | 9 | i386 | libssh2-1-dev | < 1.7.0-1+deb9u2 | libssh2-1-dev_1.7.0-1+deb9u2_i386.deb |
Debian | 10 | i386 | libssh2-1-dev | < 1.8.0-2.1+deb10u1 | libssh2-1-dev_1.8.0-2.1+deb10u1_i386.deb |
Debian | 8 | amd64 | libssh2-1-dbg | < 1.4.3-4.1+deb8u6 | libssh2-1-dbg_1.4.3-4.1+deb8u6_amd64.deb |
Debian | 8 | i386 | libssh2-1-dev | < 1.4.3-4.1+deb8u6 | libssh2-1-dev_1.4.3-4.1+deb8u6_i386.deb |
Debian | 10 | armhf | libssh2-1 | < 1.8.0-2.1+deb10u1 | libssh2-1_1.8.0-2.1+deb10u1_armhf.deb |
8.1 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H
5.8 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:P/I:N/A:P
0.004 Low
EPSS
Percentile
73.5%