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    CVE-2016-3115

    Multiple CRLF injection vulnerabilities in session.c in sshd in OpenSSH before 7.2p2 allow remote authenticated users to bypass intended shell-command restrictions via crafted X11 forwarding data, related to the (1) do_authenticated1 and (2) session_x11_req functions.

    Published:Mar 10, 2016
    Last Modified:May 29, 2026
    EPS:Mar 22, 2016
    EPSS Score:0.47105
    CVSS Score:6.4

    Affected Products

    Vendor
    Openbsd
    Product
    Openssh
    Vendor
    Oracle
    Product
    Vm Server
    Vendor
    Redhat
    Product
    Enterprise Linux

    Exploits

    https://www.exploit-db.com/exploits/39569

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-10 Buffer Overflow via Environment Variables
    CAPEC-101 Server Side Include (SSI) Injection
    CAPEC-104 Cross Zone Scripting
    CAPEC-108 Command Line Execution through SQL Injection
    CAPEC-109 Object Relational Mapping Injection
    CAPEC-110 SQL Injection through SOAP Parameter Tampering
    CAPEC-120 Double Encoding
    CAPEC-13 Subverting Environment Variable Values
    CAPEC-135 Format String Injection
    CAPEC-136 LDAP Injection
    CAPEC-14 Client-side Injection-induced Buffer Overflow
    CAPEC-15 Command Delimiters
    CAPEC-153 Input Data Manipulation
    CAPEC-182 Flash Injection
    CAPEC-209 XSS Using MIME Type Mismatch
    CAPEC-22 Exploiting Trust in Client
    CAPEC-23 File Content Injection
    CAPEC-230 Serialized Data with Nested Payloads
    CAPEC-231 Oversized Serialized Data Payloads
    CAPEC-24 Filter Failure through Buffer Overflow
    CAPEC-250 XML Injection
    CAPEC-261 Fuzzing for garnering other adjacent user/sensitive data
    CAPEC-267 Leverage Alternate Encoding
    CAPEC-28 Fuzzing
    CAPEC-3 Using Leading 'Ghost' Character Sequences to Bypass Input Filters
    CAPEC-31 Accessing/Intercepting/Modifying HTTP Cookies
    CAPEC-42 MIME Conversion
    CAPEC-43 Exploiting Multiple Input Interpretation Layers
    CAPEC-45 Buffer Overflow via Symbolic Links
    CAPEC-46 Overflow Variables and Tags
    CAPEC-47 Buffer Overflow via Parameter Expansion
    CAPEC-473 Signature Spoof
    CAPEC-52 Embedding NULL Bytes
    CAPEC-53 Postfix, Null Terminate, and Backslash
    CAPEC-588 DOM-Based XSS
    CAPEC-63 Cross-Site Scripting (XSS)
    CAPEC-64 Using Slashes and URL Encoding Combined to Bypass Validation Logic
    CAPEC-664 Server Side Request Forgery
    CAPEC-67 String Format Overflow in syslog()
    CAPEC-7 Blind SQL Injection
    CAPEC-71 Using Unicode Encoding to Bypass Validation Logic
    CAPEC-72 URL Encoding
    CAPEC-73 User-Controlled Filename
    CAPEC-78 Using Escaped Slashes in Alternate Encoding
    CAPEC-79 Using Slashes in Alternate Encoding
    CAPEC-8 Buffer Overflow in an API Call
    CAPEC-80 Using UTF-8 Encoding to Bypass Validation Logic
    CAPEC-81 Web Server Logs Tampering
    CAPEC-83 XPath Injection
    CAPEC-85 AJAX Footprinting
    CAPEC-88 OS Command Injection
    CAPEC-9 Buffer Overflow in Local Command-Line Utilities

    Related CVEs

    CVE-2026-73283 (CVSS 2.5) — In sshd in OpenSSH before 10.5, the restrict keyword (in authorized_keys) was supposed to be applicable to tun…
    CVE-2026-73282 (CVSS 4.8) — In ssh in OpenSSH before 10.5, a use-after-free for realloc data can occur if a certain pair of remote-forward…
    CVE-2026-73281 (CVSS 3.5) — In ssh-agent in OpenSSH before 10.5, some operations can occur remotely but were intended to occur only locall…
    CVE-2026-60002 (CVSS 7.7) — ssh in OpenSSH before 10.4 can have a use-after-free when a server changes its host key during a key re-exchan…
    CVE-2026-60001 (CVSS 6.5) — sshd in OpenSSH before 10.4 does not always honor the minimum authentication delay.…
    CVE-2026-60000 (CVSS 3.7) — sshd in OpenSSH before 10.4 allows remote attackers to cause a denial of service (resource consumption from ex…
    CVE-2026-59999 (CVSS 5.9) — In sshd in OpenSSH before 10.4, DisableForwarding=yes was supposed to take precedence over PermitTunnel=yes, b…
    CVE-2026-59998 (CVSS 4.8) — sshd in OpenSSH before 10.4 has an undocumented security-relevant behavior: GSSAPIStrictAcceptorCheck has no v…
    CVE-2026-59997 (CVSS 4.2) — internal-sftp in sshd in OpenSSH before 10.4 recognizes only the first 9 command-line arguments, which can be …
    CVE-2026-59996 (CVSS 4.2) — scp in OpenSSH before 10.4 may place a file in the parent directory of an intended directory when the copy occ…

    References

    http://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/session.c
    http://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/session.c.diff?r1=1.281&r2=1.282&f=h
    http://lists.fedoraproject.org/pipermail/package-announce/2016-April/183101.html
    http://lists.fedoraproject.org/pipermail/package-announce/2016-April/183122.html
    http://lists.fedoraproject.org/pipermail/package-announce/2016-March/178838.html
    http://lists.fedoraproject.org/pipermail/package-announce/2016-March/179924.html
    http://lists.fedoraproject.org/pipermail/package-announce/2016-March/180491.html
    http://lists.fedoraproject.org/pipermail/package-announce/2016-May/184264.html
    http://packetstormsecurity.com/files/136234/OpenSSH-7.2p1-xauth-Command-Injection-Bypass.html
    http://rhn.redhat.com/errata/RHSA-2016-0465.html
    http://rhn.redhat.com/errata/RHSA-2016-0466.html
    http://seclists.org/fulldisclosure/2016/Mar/46
    http://seclists.org/fulldisclosure/2016/Mar/47
    http://www.openssh.com/txt/x11fwd.adv
    http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html
    http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html
    http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html
    http://www.securityfocus.com/bid/84314
    http://www.securitytracker.com/id/1035249
    https://bto.bluecoat.com/security-advisory/sa121
    https://github.com/tintinweb/pub/tree/master/pocs/cve-2016-3115
    https://lists.debian.org/debian-lts-announce/2018/09/msg00010.html
    https://security.gentoo.org/glsa/201612-18
    https://www.exploit-db.com/exploits/39569/
    https://www.freebsd.org/security/advisories/FreeBSD-SA-16:14.openssh.asc
    http://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/session.c
    http://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/session.c.diff?r1=1.281&r2=1.282&f=h
    http://lists.fedoraproject.org/pipermail/package-announce/2016-April/183101.html
    http://lists.fedoraproject.org/pipermail/package-announce/2016-April/183122.html
    http://lists.fedoraproject.org/pipermail/package-announce/2016-March/178838.html
    http://lists.fedoraproject.org/pipermail/package-announce/2016-March/179924.html
    http://lists.fedoraproject.org/pipermail/package-announce/2016-March/180491.html
    http://lists.fedoraproject.org/pipermail/package-announce/2016-May/184264.html
    http://packetstormsecurity.com/files/136234/OpenSSH-7.2p1-xauth-Command-Injection-Bypass.html
    http://rhn.redhat.com/errata/RHSA-2016-0465.html
    http://rhn.redhat.com/errata/RHSA-2016-0466.html
    http://seclists.org/fulldisclosure/2016/Mar/46
    http://seclists.org/fulldisclosure/2016/Mar/47
    http://www.openssh.com/txt/x11fwd.adv
    http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html
    http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html
    http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html
    http://www.securityfocus.com/bid/84314
    http://www.securitytracker.com/id/1035249
    https://bto.bluecoat.com/security-advisory/sa121
    https://github.com/tintinweb/pub/tree/master/pocs/cve-2016-3115
    https://lists.debian.org/debian-lts-announce/2018/09/msg00010.html
    https://security.gentoo.org/glsa/201612-18
    https://www.exploit-db.com/exploits/39569/
    https://www.freebsd.org/security/advisories/FreeBSD-SA-16:14.openssh.asc

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High