CVE-2016-10012: The shared memory manager (associated with pre-authentication compression) in sshd in OpenSSH before 7.4 does not ensure that a bounds check…
Noroxi assessment
Priority: Monitor (action score 31/100)
- The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
- Probability of exploitation in the next 30 days: 1.2% (FIRST EPSS); higher than 70.5% of all records.
- Someone with local access to the system 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 (Alpine:v3.10) 7.4_p1-r0; openssh (Alpine:v3.3) 7.2_p2-r3; openssh (Alpine:v3.4) 7.2_p2-r4.
Low priority for now. Upgrade to openssh (Alpine:v3.10) 7.4_p1-r0; openssh (Alpine:v3.3) 7.2_p2-r3; openssh (Alpine:v3.4) 7.2_p2-r4 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
The shared memory manager (associated with pre-authentication compression) in sshd in OpenSSH before 7.4 does not ensure that a bounds check is enforced by all compilers, which might allows local users to gain privileges by leveraging access to a sandboxed privilege-separation process, related to the m_zback and m_zlib data structures.
- Published
- Jan 4, 2017
- Updated
- Jun 16, 2026
- EPSS
- 1.2% · 70th percentile
- CWE
- CWE-119
Report tools
Action score
31
Low priority for now.
- CVSS
- 31 / 40 · 7.8 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 1.2%
CISA SSVC decision
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
Vulnrichment: CISA's decision-tree inputs.
Get told when this record changes
- Not in KEV: no record of exploitation in the wild
- No public exploit code on record
- 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?
Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.
| Vendor | Product | CPE |
|---|---|---|
| openbsd | openssh | cpe:2.3:a:openbsd:openssh |
Is OpenSSH on your server exposed to the internet?
The free port scanner finds the open ports on your server and matches the service versions it can read against known vulnerabilities. No account needed.
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 7.3 inclusive
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Alpine:v3.10 | openssh | before 7.4_p1-r0 | 7.4_p1-r0 |
| Alpine:v3.3 | openssh | before 7.2_p2-r3 | 7.2_p2-r3 |
| Alpine:v3.4 | openssh | before 7.2_p2-r4 | 7.2_p2-r4 |
| Alpine:v3.7 | openssh | before 7.5_p1-r8 | 7.5_p1-r8 |
| Debian:12 | openssh | before 1:7.4p1-1 | 1:7.4p1-1 |
| Debian:8 | openssh | before 1:6.7p1-5+deb8u6 | 1:6.7p1-5+deb8u6 |
| openSUSE:Tumbleweed | openssh | before 8.4p1-7.4 | 8.4p1-7.4 |
| Red Hat:enterprise_linux:7::client | openssh | before 0:7.4p1-11.el7 | 0:7.4p1-11.el7 |
| Red Hat:enterprise_linux:7::client | openssh-askpass | before 0:7.4p1-11.el7 | 0:7.4p1-11.el7 |
| Red Hat:enterprise_linux:7::client | openssh-cavs | before 0:7.4p1-11.el7 | 0:7.4p1-11.el7 |
| Red Hat:enterprise_linux:7::client | openssh-clients | before 0:7.4p1-11.el7 | 0:7.4p1-11.el7 |
| Red Hat:enterprise_linux:7::client | openssh-debuginfo | before 0:7.4p1-11.el7 | 0:7.4p1-11.el7 |
| Red Hat:enterprise_linux:7::client | openssh-keycat | before 0:7.4p1-11.el7 | 0:7.4p1-11.el7 |
| Red Hat:enterprise_linux:7::client | openssh-ldap | before 0:7.4p1-11.el7 | 0:7.4p1-11.el7 |
| Red Hat:enterprise_linux:7::client | openssh-server | before 0:7.4p1-11.el7 | 0:7.4p1-11.el7 |
| Red Hat:enterprise_linux:7::client | openssh-server-sysvinit | before 0:7.4p1-11.el7 | 0:7.4p1-11.el7 |
| Red Hat:enterprise_linux:7::client | pam_ssh_agent_auth | before 0:0.10.3-1.11.el7 | 0:0.10.3-1.11.el7 |
| SUSE:Linux Enterprise Desktop 12 SP2 | openssh | before 7.2p2-66.1 | 7.2p2-66.1 |
| SUSE:Linux Enterprise Desktop 12 SP2 | openssh-askpass-gnome | before 7.2p2-66.3 | 7.2p2-66.3 |
| SUSE:Linux Enterprise Point of Sale 11 SP3 | openssh | before 6.2p2-0.41.5.1 | 6.2p2-0.41.5.1 |
| SUSE:Linux Enterprise Point of Sale 11 SP3 | openssh-askpass-gnome | before 6.2p2-0.41.5.1 | 6.2p2-0.41.5.1 |
| SUSE:Linux Enterprise Server 11 SP4 | openssh | before 6.6p1-36.3.1 | 6.6p1-36.3.1 |
| SUSE:Linux Enterprise Server 11 SP4 | openssh-askpass-gnome | before 6.6p1-36.3.1 | 6.6p1-36.3.1 |
| SUSE:Linux Enterprise Server 11-SECURITY | openssh-openssl1 | before 6.6p1-19.3.1 | 6.6p1-19.3.1 |
+2
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-2016-10010Jan 4, 2017 · sshd in OpenSSH before 7.4, when privilege separation is not used, creates forwarded Unix-domain sockets as root, which might allow local…29Monitor
- ← EarlierCVE-2016-10011Jan 4, 2017 · authfile.c in sshd in OpenSSH before 7.4 does not properly consider the effects of realloc on buffer contents, which might allow local…24Monitor
- Later →CVE-2016-6210Feb 13, 2017 · sshd in OpenSSH before 7.3, when SHA256 or SHA512 are used for user password hashing, uses BLOWFISH hashing on a static password when the…60This week
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 |
|---|---|---|
| alpine:openssh | 7.4_p1-r0 · Alpine:v3.10 | Package registry (OSV) |
| debian:openssh | 1:7.4p1-1 · Debian:12 | Package registry (OSV) |
| opensuse:openssh | 8.4p1-7.4 · openSUSE:Tumbleweed | Package registry (OSV) |
| red hat:openssh | 0:7.4p1-11.el7 · Red Hat:enterprise_linux:7::client | Package registry (OSV) |
| red hat:openssh-askpass | 0:7.4p1-11.el7 · Red Hat:enterprise_linux:7::client | Package registry (OSV) |
| red hat:openssh-cavs | 0:7.4p1-11.el7 · Red Hat:enterprise_linux:7::client | Package registry (OSV) |
| red hat:openssh-clients | 0:7.4p1-11.el7 · Red Hat:enterprise_linux:7::client | Package registry (OSV) |
| red hat:openssh-debuginfo | 0:7.4p1-11.el7 · Red Hat:enterprise_linux:7::client | Package registry (OSV) |
| red hat:openssh-keycat | 0:7.4p1-11.el7 · Red Hat:enterprise_linux:7::client | Package registry (OSV) |
| red hat:openssh-ldap | 0:7.4p1-11.el7 · Red Hat:enterprise_linux:7::client | Package registry (OSV) |
| red hat:openssh-server | 0:7.4p1-11.el7 · Red Hat:enterprise_linux:7::client | Package registry (OSV) |
| red hat:openssh-server-sysvinit | 0:7.4p1-11.el7 · Red Hat:enterprise_linux:7::client | Package registry (OSV) |
| red hat:pam_ssh_agent_auth | 0:0.10.3-1.11.el7 · Red Hat:enterprise_linux:7::client | Package registry (OSV) |
| suse:openssh | 7.2p2-66.1 · SUSE:Linux Enterprise Desktop 12 SP2 | Package registry (OSV) |
| suse:openssh-askpass-gnome | 7.2p2-66.3 · SUSE:Linux Enterprise Desktop 12 SP2 | Package registry (OSV) |
| suse:openssh-openssl1 | 6.6p1-19.3.1 · SUSE:Linux Enterprise Server 11-SECURITY | Package registry (OSV) |
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
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.
No dated events beyond publication.
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
Not on record for this CVE: EPSS history · researcher credit · variant or chain candidate · public bounty program.
Technical details
Attack conditions
- Someone with local access to the system 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
- high · data can be read
- Integrity
- high · data or configuration can be modified
- Availability
- high · the service can be disrupted
- Attack vector
- Local
- Attack complexity
- Low
- Privileges required
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
Weakness class (CWE)
CWE-119 · Improper Restriction of Operations within the Bounds of a Memory BufferCVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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)
- Buffer Overflow via Environment VariablesCAPEC-10likelihood: High · High
- Overflow BuffersCAPEC-100likelihood: High · Very High
- Buffer ManipulationCAPEC-123likelihood: High · Very High
- Client-side Injection-induced Buffer OverflowCAPEC-14likelihood: Medium · High
- Filter Failure through Buffer OverflowCAPEC-24likelihood: High · High
- MIME ConversionCAPEC-42likelihood: High · High
- Overflow Binary Resource FileCAPEC-44likelihood: High · Very High
- Buffer Overflow via Symbolic LinksCAPEC-45likelihood: High · High
ATT&CK techniques
—
Change log (1)
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
Show all references (11 more)Show less
- www.securityfocus.com/bid/94975
- www.securitytracker.com/id/1037490
- www.slackware.com/security/viewer.php?l=slackware-security&y=2016&m=slackware-security.647637
- access.redhat.com/errata/RHSA-2017:2029
- cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf
- github.com/openbsd/src/commit/3095060f479b86288e31c79ecbc5131a66bcd2f9
- lists.debian.org/debian-lts-announce/2018/09/msg00010.html
- security.netapp.com/advisory/ntap-20171130-0002/
- support.f5.com/csp/article/K62201745?utm_source=f5support&%3Butm_medium=RSS
- support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03818en_us
- www.openssh.com/txt/release-7.4
Vendor advisories and official records. Exploit/PoC links are deliberately left out.