Ubuntu.comUB:CVE-2019-17498CVE-2019-17498
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%
In libssh2 v1.9.0 and earlier versions, the 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.
References
blog.semmle.com/libssh2-integer-overflow-CVE-2019-17498/
github.com/kevinbackhouse/SecurityExploits/tree/8cbdbbe6363510f7d9ceec685373da12e6fc752d/libssh2/out_of_bounds_read_disconnect_CVE-2019-17498
github.com/libssh2/libssh2/blob/42d37aa63129a1b2644bf6495198923534322d64/src/packet.c#L480
github.com/libssh2/libssh2/pull/402/commits/1c6fa92b77e34d089493fe6d3e2c6c8775858b94
launchpad.net/bugs/cve/CVE-2019-17498
nvd.nist.gov/vuln/detail/CVE-2019-17498
security-tracker.debian.org/tracker/CVE-2019-17498
ubuntu.com/security/notices/USN-5308-1
www.cve.org/CVERecord?id=CVE-2019-17498
Related
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%