CVE-2019-3857
CVE-2019-3857 Vulnerability Analysis & Exploit Intelligence
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.
Published Updated Sources: cvelistV5, redhat
Triage
Is it exploited, how likely is exploitation, what does it touch, and how severe do the scoring sources call it.
Exploitation
Unreported
no source claims exploitation
EPSS
6%
chance of exploitation in 30 days
CVSS base
7.5
HIGH
CISA SSVC assessment
Three decision points CISA publishes for the CVEs it assesses · SSVC 2.0.3. A stakeholder decision, not a severity score.
Exploitation
None
none · proof-of-concept · active
Automatable
No
can an attacker script all four kill-chain steps
Technical impact
Total
partial · total control of the vulnerable component
Affected scope
The catalog records vendors and products as separate lists, not pairs, so which product belongs to which vendor is not something this page can say.
Vendors (1)
Products (1)
Every base score collected
Sources score independently and disagree; each row says who scored it and under which version.
| Score | Version | Severity | Expl. | Impact | Source |
|---|---|---|---|---|---|
| 7.5 | CVSS 3.0 | HIGH | — | — | cvelistV5 |
Weakness & attack patterns
- CWE-190
- CWE-787
References
16 on the record
- bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3857
x_refsource_CONFIRM
- www.libssh2.org/CVE-2019-3857.html
x_refsource_MISC
- lists.debian.org/debian-lts-announce/2019/03/msg00032.html
mailing-list, x_refsource_MLIST
- security.netapp.com/advisory/ntap-20190327-0005/
x_refsource_CONFIRM
- access.redhat.com/errata/RHSA-2019:0679
vendor-advisory, x_refsource_REDHAT
- lists.opensuse.org/opensuse-security-announce/2019-03/msg00040.html
vendor-advisory, x_refsource_SUSE
- lists.opensuse.org/opensuse-security-announce/2019-04/msg00003.html
vendor-advisory, x_refsource_SUSE
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5DK6VO2CEUTAJFYIKWNZKEKYMYR3NO2O/
vendor-advisory, x_refsource_FEDORA
Elsewhere on this site
- the libssh2 projectevery CVE for this vendor
- CWE-190other pages naming this weakness
Not in any source we poll
Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.
- No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
- No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
- No exploit packet captures, log samples, or incident case IDs supplied.