ASA-2019-00143 – libssh2: Possible integer overflow in transport read allows out-of-bounds write

Posted on by Allele Security Intelligence in Alerts

Allele Security Alert

ASA-2019-00143

Identifier(s)

ASA-2019-00143, CVE-2019-3855

Title

Possible integer overflow in transport read allows out-of-bounds write

Vendor(s)

The libssh2 project

Product(s)

libssh2

Affected version(s)

libssh2 all versions to and including 1.8.0

Fixed version(s)

libssh2 1.8.1

Proof of concept

Unknown

Description

A malicious server could send a specially crafted packet which could result in an unchecked integer overflow. The value would then be used to allocate memory causing a possible memory write out of bounds error (CWE-130).

Technical details

Unknown

Credits

Chris Coulson (Canonical Ltd)

Reference(s)

libssh2 Security Advisory: CVE-2019-3855
https://www.libssh2.org/CVE-2019-3855.html

[SECURITY ADVISORIES] libssh2
https://seclists.org/oss-sec/2019/q1/184

Security fixes (#315) · libssh2/libssh2@dc109a7
https://github.com/libssh2/libssh2/commit/dc109a7f518757741590bb993c0c8412928ccec2

Security fixes by willco007 · Pull Request #315 · libssh2/libssh2
https://github.com/libssh2/libssh2/pull/315

CVE-2019-3855 - Red Hat Customer Portal
https://access.redhat.com/security/cve/CVE-2019-3855

CVE-2019-3855
https://security-tracker.debian.org/tracker/CVE-2019-3855

CVE-2019-3855 in Ubuntu
https://people.canonical.com/~ubuntu-security/cve/CVE-2019-3855.html

CVE-2019-3855 | SUSE
https://www.suse.com/security/cve/CVE-2019-3855

CVE-2019-3855
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-3855

CVE-2019-3855
https://nvd.nist.gov/vuln/detail/CVE-2019-3855

If there is any error in this alert or you wish a comprehensive analysis, let us know.

Last modified: March 19, 2019

We are not responsible for any data loss, device corruption or any other type of issue due to the use of any information mentioned in our security alerts.