SARA / Free Tools / CVE / CVE-2019-3855

CVE-2019-3855 — An integer overflow flaw which could lead to an out of bounds write was discover

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 serv

CVSS
9.3 CISA
EPSS
9.29% (top 4.70%)
CWE
—
Published
2019-03-21T21:29:00.433
Last modified
2026-10-14T07:16:51.257
CVSS vector
AV:N/AC:M/Au:N/C:C/I:C/A:C

01What is this vulnerability?

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.

02Affected products

No structured affected-product list available — see references below for vendor advisories.

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

09References

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