Vulnerability Details : CVE-2019-3855
An integer overflow flaw which could lead to an out of bounds write was discovered in libssh2 before 1.8.1 in the way packets are read from the server. A remote attacker who compromises a SSH server may be able to execute code on the client system when a user connects to the server.
Vulnerability category: OverflowMemory CorruptionExecute code
Products affected by CVE-2019-3855
- cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
- cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:advanced_virtualization:*:*:*
- cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux_server_aus:7.6:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux_server_eus:7.6:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux_server_tus:7.6:*:*:*:*:*:*:*
- cpe:2.3:a:apple:xcode:*:*:*:*:*:*:*:*
- cpe:2.3:a:oracle:peoplesoft_enterprise_peopletools:8.56:*:*:*:*:*:*:*
- cpe:2.3:a:oracle:peoplesoft_enterprise_peopletools:8.57:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:28:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:29:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:*
- cpe:2.3:o:opensuse:leap:42.3:*:*:*:*:*:*:*
- cpe:2.3:a:netapp:ontap_select_deploy_administration_utility:-:*:*:*:*:*:*:*
- cpe:2.3:a:libssh2:libssh2:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2019-3855
2.36%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 90 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2019-3855
Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
---|---|---|---|---|---|---|
9.3
|
HIGH | AV:N/AC:M/Au:N/C:C/I:C/A:C |
8.6
|
10.0
|
NIST | |
7.5
|
HIGH | CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H |
1.6
|
5.9
|
Red Hat, Inc. | |
8.8
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
2.8
|
5.9
|
NIST |
CWE ids for CVE-2019-3855
-
The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.Assigned by:
- nvd@nist.gov (Primary)
- secalert@redhat.com (Secondary)
-
The product writes data past the end, or before the beginning, of the intended buffer.Assigned by:
- nvd@nist.gov (Primary)
- secalert@redhat.com (Secondary)
References for CVE-2019-3855
-
https://access.redhat.com/errata/RHSA-2019:1652
RHSA-2019:1652 - Security Advisory - Red Hat Customer PortalThird Party Advisory
-
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/6LUNHPW64IGCASZ4JQ2J5KDXNZN53DWW/
[SECURITY] Fedora 30 Update: libssh2-1.9.0-1.fc30 - package-announce - Fedora Mailing-ListsMailing List;Third Party Advisory
-
http://packetstormsecurity.com/files/152136/Slackware-Security-Advisory-libssh2-Updates.html
Slackware Security Advisory - libssh2 Updates ≈ Packet StormThird Party Advisory;VDB Entry
-
https://www.libssh2.org/CVE-2019-3855.html
libssh2 Security Advisory: CVE-2019-3855Patch;Vendor Advisory
-
https://security.netapp.com/advisory/ntap-20190327-0005/
March 2019 Libssh2 Vulnerabilities in NetApp Products | NetApp Product SecurityThird Party Advisory
-
http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00003.html
[security-announce] openSUSE-SU-2019:1109-1: moderate: Security update fThird Party Advisory
-
https://access.redhat.com/errata/RHSA-2019:1175
RHSA-2019:1175 - Security Advisory - Red Hat Customer PortalThird Party Advisory
-
https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html
Page not found | OraclePatch;Third Party Advisory
-
http://seclists.org/fulldisclosure/2019/Sep/42
Full Disclosure: APPLE-SA-2019-9-26-7 Xcode 11.0Mailing List;Third Party Advisory
-
https://www.debian.org/security/2019/dsa-4431
Debian -- Security Information -- DSA-4431-1 libssh2Third Party Advisory
-
https://seclists.org/bugtraq/2019/Apr/25
Bugtraq: [SECURITY] [DSA 4431-1] libssh2 security updateMailing List;Third Party Advisory
-
http://www.openwall.com/lists/oss-security/2019/03/18/3
oss-security - [SECURITY ADVISORIES] libssh2Mailing List;Patch;Third Party Advisory
-
https://access.redhat.com/errata/RHSA-2019:1943
RHSA-2019:1943 - Security Advisory - Red Hat Customer PortalThird Party Advisory
-
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/M7IF3LNHOA75O4WZWIHJLIRMA5LJUED3/
[SECURITY] Fedora 29 Update: libssh2-1.9.0-1.fc29 - package-announce - Fedora Mailing-ListsMailing List;Third Party Advisory
-
https://seclists.org/bugtraq/2019/Mar/25
Bugtraq: [slackware-security] libssh2 (SSA:2019-077-01)Mailing List;Third Party Advisory
-
https://support.apple.com/kb/HT210609
About the security content of Xcode 11.0 - Apple SupportThird Party Advisory
-
https://access.redhat.com/errata/RHSA-2019:0679
RHSA-2019:0679 - Security Advisory - Red Hat Customer PortalThird Party Advisory
-
https://seclists.org/bugtraq/2019/Sep/49
Bugtraq: APPLE-SA-2019-9-26-7 Xcode 11.0Mailing List;Third Party Advisory
-
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XCWEA5ZCLKRDUK62QVVYMFWLWKOPX3LO/
[SECURITY] Fedora 29 Update: libssh2-1.8.1-1.fc29 - package-announce - Fedora Mailing-ListsThird Party Advisory
-
https://www.broadcom.com/support/fibre-channel-networking/security-advisories/brocade-security-advisory-2019-767
Broadcom Inc. | Connecting EverythingThird Party Advisory
-
https://lists.debian.org/debian-lts-announce/2019/03/msg00032.html
[SECURITY] [DLA 1730-1] libssh2 security updateMailing List;Third Party Advisory
-
http://www.securityfocus.com/bid/107485
libssh2 Multiple Security VulnerabilitiesThird Party Advisory;VDB Entry
-
http://lists.opensuse.org/opensuse-security-announce/2019-03/msg00040.html
[security-announce] openSUSE-SU-2019:1075-1: moderate: Security update fMailing List;Third Party Advisory
-
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/5DK6VO2CEUTAJFYIKWNZKEKYMYR3NO2O/
[SECURITY] Fedora 28 Update: libssh2-1.8.1-1.fc28 - package-announce - Fedora Mailing-ListsMailing List;Third Party Advisory
-
https://access.redhat.com/errata/RHSA-2019:2399
RHSA-2019:2399 - Security Advisory - Red Hat Customer PortalThird Party Advisory
-
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3855
1687303 – (CVE-2019-3855) CVE-2019-3855 libssh2: Integer overflow in transport read resulting in out of bounds writeIssue Tracking;Patch;Third Party Advisory
-
https://access.redhat.com/errata/RHSA-2019:1791
RHSA-2019:1791 - Security Advisory - Red Hat Customer PortalThird Party Advisory
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