CVE-2019-3857
An integer overflow flaw which could lead to an out of bounds write was discovered in libssh2 before 1.8.1 in the way SSH_MSG_CHANNEL_REQUEST packets with an exit signal are parsed.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (6.13%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
An integer overflow flaw which could lead to an out of bounds write was discovered in libssh2 before 1.8.1 in the way SSH_MSG_CHANNEL_REQUEST packets with an exit signal are parsed. 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.
- CVSS 3.1
- 8.8 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- EPSS
- 6.13% probability · 93th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-190, CWE-787
- Affected
- libssh2/libssh2 · debian/debian linux · netapp/ontap select deploy administration utility · opensuse/leap · redhat/enterprise linux · redhat/enterprise linux desktop · redhat/enterprise linux server · redhat/enterprise linux server aus · redhat/enterprise linux server eus · redhat/enterprise linux server tus · redhat/enterprise linux workstation · fedoraproject/fedora · oracle/peoplesoft enterprise peopletools
- Source
- secalert@redhat.com
EPSS 6.1% since 26 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://lists.opensuse.org/opensuse-security-announce/2019-03/msg00040.htmlMailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00003.htmlThird Party Advisory
- https://access.redhat.com/errata/RHSA-2019:0679Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:1175Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:1652Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:1791Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:1943Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:2399Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3857Issue Tracking, Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/03/msg00032.htmlThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5DK6VO2CEUTAJFYIKWNZKEKYMYR3NO2O/
- https://seclists.org/bugtraq/2019/Apr/25Mailing List, Third Party Advisory
- https://security.netapp.com/advisory/ntap-20190327-0005/Third Party Advisory
- https://www.debian.org/security/2019/dsa-4431Third Party Advisory
- https://www.libssh2.org/CVE-2019-3857.htmlPatch, Vendor Advisory
- https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.htmlPatch, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-03/msg00040.htmlMailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00003.htmlThird Party Advisory
- https://access.redhat.com/errata/RHSA-2019:0679Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:1175Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:1652Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:1791Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:1943Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:2399Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3857Issue Tracking, Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/03/msg00032.htmlThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5DK6VO2CEUTAJFYIKWNZKEKYMYR3NO2O/
- https://seclists.org/bugtraq/2019/Apr/25Mailing List, Third Party Advisory
- https://security.netapp.com/advisory/ntap-20190327-0005/Third Party Advisory
- https://www.debian.org/security/2019/dsa-4431Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.