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CVE
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CVE-2019-17498Date: (C)2019-10-28   (M)2023-12-22


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.

CVSS Score and Metrics +CVSS Score and Metrics -

CVSS V3 Severity:CVSS V2 Severity:
CVSS Score : 8.1CVSS Score : 5.8
Exploit Score: 2.8Exploit Score: 8.6
Impact Score: 5.2Impact Score: 4.9
 
CVSS V3 Metrics:CVSS V2 Metrics:
Attack Vector: NETWORKAccess Vector: NETWORK
Attack Complexity: LOWAccess Complexity: MEDIUM
Privileges Required: NONEAuthentication: NONE
User Interaction: REQUIREDConfidentiality: PARTIAL
Scope: UNCHANGEDIntegrity: NONE
Confidentiality: HIGHAvailability: PARTIAL
Integrity: NONE 
Availability: HIGH 
  
Reference:
FEDORA-2019-91529f19e4
FEDORA-2019-ec04c34768
https://lists.debian.org/debian-lts-announce/2019/11/msg00010.html
https://lists.debian.org/debian-lts-announce/2021/12/msg00013.html
https://lists.debian.org/debian-lts-announce/2023/09/msg00006.html
http://packetstormsecurity.com/files/172835/libssh2-1.9.0-Out-Of-Bounds-Read.html
https://blog.semmle.com/libssh2-integer-overflow-CVE-2019-17498/
https://github.com/kevinbackhouse/SecurityExploits/tree/8cbdbbe6363510f7d9ceec685373da12e6fc752d/libssh2/out_of_bounds_read_disconnect_CVE-2019-17498
https://github.com/libssh2/libssh2/blob/42d37aa63129a1b2644bf6495198923534322d64/src/packet.c#L480
https://github.com/libssh2/libssh2/commit/dedcbd106f8e52d5586b0205bc7677e4c9868f9c
https://security.netapp.com/advisory/ntap-20220909-0004/
openSUSE-SU-2019:2483

CPE    3
cpe:/o:debian:debian_linux:9.0
cpe:/o:debian:debian_linux:8.0
cpe:/a:libssh2:libssh2
CWE    1
CWE-190
OVAL    13
oval:org.secpod.oval:def:89003199
oval:org.secpod.oval:def:89003473
oval:org.secpod.oval:def:89050655
oval:org.secpod.oval:def:117330
...

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