CVSS2
Attack Vector
NETWORK
Attack 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
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
AI Score
Confidence
High
EPSS
Percentile
74.1%
Package : libssh2
Version : 1.8.0-2.1+deb10u1
CVE ID : CVE-2019-13115 CVE-2019-17498 CVE-2020-22218
Debian Bug : 932329 943562
Vulnerabilities were found in libssh2, a client-side C library
implementing the SSH2 protocol, which could lead to denial of service or
remote information disclosure.
CVE-2019-13115
Kevin Backhouse discovered an integer overflow vulnerability in kex.c's
kex_method_diffie_hellman_group_exchange_sha256_key_exchange()
function, which could lead to an out-of-bounds read in the way
packets are read from the server. A remote attacker who compromises
an 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
Kevin Backhouse discovered that the SSH_MSG_DISCONNECT logic in
packet.c has an integer overflow in a bounds check, thereby enabling
an attacker to specify an arbitrary (out-of-bounds) offset for a
subsequent memory read. A malicious 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-2020-22218
An issue was discovered in function _libssh2_packet_add(), which
could allow attackers to access out of bounds memory.
For Debian 10 buster, these problems have been fixed in version
1.8.0-2.1+deb10u1.
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
Attachment:
signature.asc
Description: PGP signature
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
Debian | 11 | s390x | libssh2-1 | < 1.9.0-2+deb11u1 | libssh2-1_1.9.0-2+deb11u1_s390x.deb |
Debian | 8 | armel | libssh2-1-dev | < 1.4.3-4.1+deb8u6 | libssh2-1-dev_1.4.3-4.1+deb8u6_armel.deb |
Debian | 9 | armel | libssh2-1-dbg | < 1.7.0-1+deb9u2 | libssh2-1-dbg_1.7.0-1+deb9u2_armel.deb |
Debian | 8 | armhf | libssh2-1-dev | < 1.4.3-4.1+deb8u6 | libssh2-1-dev_1.4.3-4.1+deb8u6_armhf.deb |
Debian | 9 | arm64 | libssh2-1-dbg | < 1.7.0-1+deb9u2 | libssh2-1-dbg_1.7.0-1+deb9u2_arm64.deb |
Debian | 9 | arm64 | libssh2-1-dev | < 1.7.0-1+deb9u2 | libssh2-1-dev_1.7.0-1+deb9u2_arm64.deb |
Debian | 10 | amd64 | libssh2-1-dbgsym | < 1.8.0-2.1+deb10u1 | libssh2-1-dbgsym_1.8.0-2.1+deb10u1_amd64.deb |
Debian | 10 | i386 | libssh2-1-dbgsym | < 1.8.0-2.1+deb10u1 | libssh2-1-dbgsym_1.8.0-2.1+deb10u1_i386.deb |
Debian | 9 | armhf | libssh2-1-dbg | < 1.7.0-1+deb9u2 | libssh2-1-dbg_1.7.0-1+deb9u2_armhf.deb |
Debian | 9 | amd64 | libssh2-1 | < 1.7.0-1+deb9u2 | libssh2-1_1.7.0-1+deb9u2_amd64.deb |
CVSS2
Attack Vector
NETWORK
Attack 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
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
AI Score
Confidence
High
EPSS
Percentile
74.1%