CVE-2016-3115: Multiple CRLF injection vulnerabilities in session.c in sshd in OpenSSH before 7.2p2 allow remote authenticated users to bypass intended…
Noroxi assessment
Priority: Monitor (action score 36/100)
- Public proof-of-concept code exists (Exploit-DB); there is no record of exploitation in the wild.
- Probability of exploitation in the next 30 days: 35.5% (FIRST EPSS); higher than 98.4% of all records.
- Anyone who can reach it over the internet can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
- Fixed version: openssh (Debian:12) 1:7.2p2-1; openssh (Debian:8) 1:6.7p1-5+deb8u6; openssh (Red Hat:enterprise_linux:6::client) 0:5.3p1-114.el6_7.
Low priority for now. Upgrade to openssh (Debian:12) 1:7.2p2-1; openssh (Debian:8) 1:6.7p1-5+deb8u6; openssh (Red Hat:enterprise_linux:6::client) 0:5.3p1-114.el6_7 or later.
Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it
Primary sources: NVD · CVE.org · FIRST EPSS
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 22, 2016
- Updated
- Jun 16, 2026
- EPSS
- 35.5% · 98th percentile
- CWE
- CWE-93
Report tools
Action score
36
Low priority for now.
- CVSS
- 25 / 40 · 6.4 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 11 / 30 · 35.5%
CISA SSVC decision
- Exploitation
- proof of concept
- Automatable
- no
- Technical impact
- partial
Vulnrichment: CISA's decision-tree inputs.
Get told when this record changes
- Not in KEV: no record of exploitation in the wild
- Proof of concept exists, no weaponized module
- A fix has been released
If any of these changes, we'll tell you in the daily email digest.
Is OpenSSH on your server exposed to the internet?Run a port scan
Is your version affected? Check itNoroxi analysis
What does it mean in your environment?
The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.
We use this product, ask for helpAffected systems
Is your version affected?
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Run a port scanAffected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- openbsd opensshup to 7.2 inclusive
- oracle vm server3.2
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:12 | openssh | before 1:7.2p2-1 | 1:7.2p2-1 |
| Debian:8 | openssh | before 1:6.7p1-5+deb8u6 | 1:6.7p1-5+deb8u6 |
| Red Hat:enterprise_linux:6::client | openssh | before 0:5.3p1-114.el6_7 | 0:5.3p1-114.el6_7 |
| Red Hat:enterprise_linux:6::client | openssh-askpass | before 0:5.3p1-114.el6_7 | 0:5.3p1-114.el6_7 |
| Red Hat:enterprise_linux:6::client | openssh-clients | before 0:5.3p1-114.el6_7 | 0:5.3p1-114.el6_7 |
| Red Hat:enterprise_linux:6::client | openssh-debuginfo | before 0:5.3p1-114.el6_7 | 0:5.3p1-114.el6_7 |
| Red Hat:enterprise_linux:6::client | openssh-ldap | before 0:5.3p1-114.el6_7 | 0:5.3p1-114.el6_7 |
| Red Hat:enterprise_linux:6::client | openssh-server | before 0:5.3p1-114.el6_7 | 0:5.3p1-114.el6_7 |
| Red Hat:enterprise_linux:6::client | pam_ssh_agent_auth | before 0:0.9.3-114.el6_7 | 0:0.9.3-114.el6_7 |
| Red Hat:enterprise_linux:7::client | openssh | before 0:6.6.1p1-25.el7_2 | 0:6.6.1p1-25.el7_2 |
| Red Hat:enterprise_linux:7::client | openssh-askpass | before 0:6.6.1p1-25.el7_2 | 0:6.6.1p1-25.el7_2 |
| Red Hat:enterprise_linux:7::client | openssh-clients | before 0:6.6.1p1-25.el7_2 | 0:6.6.1p1-25.el7_2 |
| Red Hat:enterprise_linux:7::client | openssh-debuginfo | before 0:6.6.1p1-25.el7_2 | 0:6.6.1p1-25.el7_2 |
| Red Hat:enterprise_linux:7::client | openssh-keycat | before 0:6.6.1p1-25.el7_2 | 0:6.6.1p1-25.el7_2 |
| Red Hat:enterprise_linux:7::client | openssh-ldap | before 0:6.6.1p1-25.el7_2 | 0:6.6.1p1-25.el7_2 |
| Red Hat:enterprise_linux:7::client | openssh-server | before 0:6.6.1p1-25.el7_2 | 0:6.6.1p1-25.el7_2 |
| Red Hat:enterprise_linux:7::client | openssh-server-sysvinit | before 0:6.6.1p1-25.el7_2 | 0:6.6.1p1-25.el7_2 |
| Red Hat:enterprise_linux:7::client | pam_ssh_agent_auth | before 0:0.9.3-9.25.el7_2 | 0:0.9.3-9.25.el7_2 |
| SUSE:Linux Enterprise Desktop 12 | openssh | before 6.6p1-42.1 | 6.6p1-42.1 |
| SUSE:Linux Enterprise Desktop 12 | openssh-askpass-gnome | before 6.6p1-42.1 | 6.6p1-42.1 |
| SUSE:Linux Enterprise Server 11 SP4 | openssh | before 6.6p1-21.1 | 6.6p1-21.1 |
| SUSE:Linux Enterprise Server 11 SP4 | openssh-askpass-gnome | before 6.6p1-21.3 | 6.6p1-21.3 |
| SUSE:Linux Enterprise Server 11-SECURITY | openssh-openssl1 | before 6.6p1-15.1 | 6.6p1-15.1 |
| SUSE:OpenStack Cloud 5 | openssh | before 6.2p2-0.33.2 | 6.2p2-0.33.2 |
+1
Same product
openbsd: all recordsOther highest-scoring records for the same primary product.
- CVE-2026-123158sshd in OpenSSH before 10.6p2 on Linux, when musl libc is used without PAM, lacks a workaround for a password authentication bypass…KEV68This week
- CVE-2023-38408The PKCS#11 feature in ssh-agent in OpenSSH before 9.3p2 has an insufficiently trustworthy search path, leading to remote code execution if…63This week
- CVE-2018-15473OpenSSH through 7.7 is prone to a user enumeration vulnerability due to not delaying bailout for an invalid authenticating user until after…60This week
Published before and after this one in the same product
- ← EarlierCVE-2015-6565Aug 23, 2015 · sshd in OpenSSH 6.8 and 6.9 uses world-writable permissions for TTY devices, which allows local users to cause a denial of service…29Monitor
- ← EarlierCVE-2016-1907Jan 19, 2016 · The ssh_packet_read_poll2 function in packet.c in OpenSSH before 7.1p2 allows remote attackers to cause a denial of service (out-of-bounds…25Monitor
- Later →CVE-2016-6515Aug 7, 2016 · The auth_password function in auth-passwd.c in sshd in OpenSSH before 7.3 does not limit password lengths for password authentication…48Plan
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| debian:openssh | 1:7.2p2-1 · Debian:12 | Package registry (OSV) |
| red hat:openssh | 0:6.6.1p1-25.el7_2 · Red Hat:enterprise_linux:7::client | Package registry (OSV) |
| red hat:openssh-askpass | 0:6.6.1p1-25.el7_2 · Red Hat:enterprise_linux:7::client | Package registry (OSV) |
| red hat:openssh-clients | 0:6.6.1p1-25.el7_2 · Red Hat:enterprise_linux:7::client | Package registry (OSV) |
| red hat:openssh-debuginfo | 0:6.6.1p1-25.el7_2 · Red Hat:enterprise_linux:7::client | Package registry (OSV) |
| red hat:openssh-keycat | 0:6.6.1p1-25.el7_2 · Red Hat:enterprise_linux:7::client | Package registry (OSV) |
| red hat:openssh-ldap | 0:6.6.1p1-25.el7_2 · Red Hat:enterprise_linux:7::client | Package registry (OSV) |
| red hat:openssh-server | 0:6.6.1p1-25.el7_2 · Red Hat:enterprise_linux:7::client | Package registry (OSV) |
| red hat:openssh-server-sysvinit | 0:6.6.1p1-25.el7_2 · Red Hat:enterprise_linux:7::client | Package registry (OSV) |
| red hat:pam_ssh_agent_auth | 0:0.9.3-9.25.el7_2 · Red Hat:enterprise_linux:7::client | Package registry (OSV) |
| suse:openssh | 6.6p1-42.1 · SUSE:Linux Enterprise Desktop 12 | Package registry (OSV) |
| suse:openssh-askpass-gnome | 6.6p1-42.1 · SUSE:Linux Enterprise Desktop 12 | Package registry (OSV) |
| suse:openssh-openssl1 | 6.6p1-15.1 · SUSE:Linux Enterprise Server 11-SECURITY | Package registry (OSV) |
Exploit status
Proof of concept available
A public proof of concept or detection signature exists. Exploit knowledge is out there; don't delay patching.
Evidence
- Exploit-DB entry ×1
Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.
| Source | Kind | Date |
|---|---|---|
| Exploit-DB entry | remote | 2016-03-16 |
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
- First PoC-6 d
- Published
- TodayNov 15, 2026+3890 d
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Not on record for this CVE: patch commit or PR link · researcher credit · variant or chain candidate · public bounty program.
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- A low-privileged account is enough.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- low · data can be read
- Integrity
- low · data or configuration can be modified
- Availability
- none
Impact can extend beyond the vulnerable component (scope changes).
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- Low
- User interaction
- None
- Scope
- Changed
- Confidentiality impact
- Low
- Integrity impact
- Low
- Availability impact
- None
Weakness class (CWE)
CWE-93 · Improper Neutralization of CRLF Sequences ('CRLF Injection')CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
nvd-secondary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
ATT&CK techniques
—
Change log (1)
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
Show all references (19 more)Show less
- cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/session.c.diff?r1=1.281&r2=1.282&f=h
- lists.fedoraproject.org/pipermail/package-announce/2016-April/183101.html
- lists.fedoraproject.org/pipermail/package-announce/2016-April/183122.html
- lists.fedoraproject.org/pipermail/package-announce/2016-March/178838.html
- lists.fedoraproject.org/pipermail/package-announce/2016-March/179924.html
- lists.fedoraproject.org/pipermail/package-announce/2016-March/180491.html
- lists.fedoraproject.org/pipermail/package-announce/2016-May/184264.html
- rhn.redhat.com/errata/RHSA-2016-0465.html
- rhn.redhat.com/errata/RHSA-2016-0466.html
- seclists.org/fulldisclosure/2016/Mar/46
- seclists.org/fulldisclosure/2016/Mar/47
- www.openssh.com/txt/x11fwd.adv
- www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html
- www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html
- www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html
- www.securityfocus.com/bid/84314
- www.securitytracker.com/id/1035249
- bto.bluecoat.com/security-advisory/sa121
- github.com/tintinweb/pub/tree/master/pocs/cve-2016-3115
Vendor advisories and official records. Exploit/PoC links are deliberately left out.