CVE-2017-3735: While parsing an IPAddressFamily extension in an X.509 certificate, it is possible to do a one-byte overread.
Noroxi assessment
Priority: Monitor (action score 27/100)
- 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: 20.9% (FIRST EPSS); higher than 97.6% of all records.
- Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
- Fixed version: openssl (Alpine:v3.3) 1.0.2m-r0; openssl (Debian:12) 1.1.0g-1; openssl (Debian:7) 1.0.1t-1+deb7u3.
Low priority for now. Upgrade to openssl (Alpine:v3.3) 1.0.2m-r0; openssl (Debian:12) 1.1.0g-1; openssl (Debian:7) 1.0.1t-1+deb7u3 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
While parsing an IPAddressFamily extension in an X.509 certificate, it is possible to do a one-byte overread. This would result in an incorrect text display of the certificate. This bug has been present since 2006 and is present in all versions of OpenSSL before 1.0.2m and 1.1.0g.
- Published
- Aug 28, 2017
- Updated
- Jun 16, 2026
- EPSS
- 20.9% · 97th percentile
- CWE
- CWE-119
Report tools
Action score
27
Low priority for now.
- CVSS
- 21 / 40 · 5.3 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 6 / 30 · 20.9%
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.
Check your server's TLS configurationRun the SSL check
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 |
|---|---|---|
| openssl | openssl | cpe:2.3:a:openssl:openssl |
| debian | debian linux | cpe:2.3:o:debian:debian_linux |
Check your server's TLS configuration
The OpenSSL version can't be seen from outside; the free SSL checker tests your certificate, enabled TLS versions and weak ciphers. Confirm the version on your server with the package manager.
Run the SSL checkVersions reported by the vendor
Affected version ranges reported by the assigning authority (openssl). Independent of NVD's CPE analysis and usually ahead of it.
OpenSSL Software Foundation OpenSSL
- 1.1.0, 1.0.2affected
Affected versions · NVD (20)
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- debian debian linux8.0
- debian debian linux9.0
- openssl openssl0.9.7j
- openssl openssl0.9.7k
- openssl openssl0.9.7l
- openssl openssl0.9.7m
- openssl openssl0.9.8
- openssl openssl0.9.8a
- openssl openssl0.9.8b
- openssl openssl0.9.8c
- openssl openssl0.9.8d
- openssl openssl0.9.8e
- openssl openssl0.9.8f
- openssl openssl0.9.8g
- openssl openssl0.9.8h
- openssl openssl0.9.8i
- openssl openssl0.9.8j
- openssl openssl0.9.8k
- openssl openssl0.9.8l
- openssl openssl0.9.8m
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Alpine:v3.3 | openssl | before 1.0.2m-r0 | 1.0.2m-r0 |
| Debian:12 | openssl | before 1.1.0g-1 | 1.1.0g-1 |
| Debian:7 | openssl | before 1.0.1t-1+deb7u3 | 1.0.1t-1+deb7u3 |
| Debian:8 | openssl | before 1.0.1t-1+deb8u7 | 1.0.1t-1+deb8u7 |
| Debian:9 | openssl | before 1.1.0f-3+deb9u1 | 1.1.0f-3+deb9u1 |
| Debian:9 | openssl1.0 | before 1.0.2l-2+deb9u1 | 1.0.2l-2+deb9u1 |
| openSUSE:Tumbleweed | openssl-1_0_0 | before 1.0.2u-6.2 | 1.0.2u-6.2 |
| Red Hat:enterprise_linux:7::client | openssl | before 1:1.0.2k-16.el7 | 1:1.0.2k-16.el7 |
| Red Hat:enterprise_linux:7::client | openssl-debuginfo | before 1:1.0.2k-16.el7 | 1:1.0.2k-16.el7 |
| Red Hat:enterprise_linux:7::client | openssl-devel | before 1:1.0.2k-16.el7 | 1:1.0.2k-16.el7 |
| Red Hat:enterprise_linux:7::client | openssl-libs | before 1:1.0.2k-16.el7 | 1:1.0.2k-16.el7 |
| Red Hat:enterprise_linux:7::client | openssl-perl | before 1:1.0.2k-16.el7 | 1:1.0.2k-16.el7 |
| Red Hat:enterprise_linux:7::client | openssl-static | before 1:1.0.2k-16.el7 | 1:1.0.2k-16.el7 |
| SUSE:Linux Enterprise Desktop 12 SP2 | openssl | before 1.0.2j-60.16.1 | 1.0.2j-60.16.1 |
| SUSE:Linux Enterprise Module for Web and Scripting 12 | nodejs4 | before 4.8.7-15.8.1 | 4.8.7-15.8.1 |
| SUSE:Linux Enterprise Server 11-SECURITY | openssl1 | before 1.0.1g-0.58.3.1 | 1.0.1g-0.58.3.1 |
| SUSE:Linux Enterprise Server 12-LTSS | openssl | before 1.0.1i-27.28.1 | 1.0.1i-27.28.1 |
| SUSE:OpenStack Cloud 6 | openssl | before 1.0.1i-54.8.1 | 1.0.1i-54.8.1 |
| SUSE:OpenStack Cloud 7 | nodejs6 | before 6.12.2-11.8.1 | 6.12.2-11.8.1 |
Same product
openssl: all recordsOther highest-scoring records for the same primary product.
- CVE-2014-0160The (1) TLS and (2) DTLS implementations in OpenSSL 1.0.1 before 1.0.1g do not properly handle Heartbeat Extension packets, which allows…KEV90Now
- CVE-2021-3711SM2 Decryption Buffer Overflow65This week
- CVE-2003-0545Double free vulnerability in OpenSSL 0.9.7 allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code…65This week
Published before and after this one in the same product
- ← EarlierCVE-2017-3733May 4, 2017 · Encrypt-Then-Mac renegotiation crash34Monitor
- ← EarlierCVE-2016-7055May 4, 2017 · There is a carry propagating bug in the Broadwell-specific Montgomery multiplication procedure in OpenSSL 1.0.2 and 1.1.0 before 1.1.0c…27Monitor
- Later →CVE-2017-3736Nov 2, 2017 · There is a carry propagating bug in the x86_64 Montgomery squaring procedure in OpenSSL before 1.0.2m and 1.1.0 before 1.1.0g.29Monitor
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:openssl | 1.0.2m-r0 · Alpine:v3.3 | Package registry (OSV) |
| debian:openssl | 1.1.0g-1 · Debian:12 | Package registry (OSV) |
| debian:openssl1.0 | 1.0.2l-2+deb9u1 · Debian:9 | Package registry (OSV) |
| opensuse:openssl-1_0_0 | 1.0.2u-6.2 · openSUSE:Tumbleweed | Package registry (OSV) |
| red hat:openssl | 1:1.0.2k-16.el7 · Red Hat:enterprise_linux:7::client | Package registry (OSV) |
| red hat:openssl-debuginfo | 1:1.0.2k-16.el7 · Red Hat:enterprise_linux:7::client | Package registry (OSV) |
| red hat:openssl-devel | 1:1.0.2k-16.el7 · Red Hat:enterprise_linux:7::client | Package registry (OSV) |
| red hat:openssl-libs | 1:1.0.2k-16.el7 · Red Hat:enterprise_linux:7::client | Package registry (OSV) |
| red hat:openssl-perl | 1:1.0.2k-16.el7 · Red Hat:enterprise_linux:7::client | Package registry (OSV) |
| red hat:openssl-static | 1:1.0.2k-16.el7 · Red Hat:enterprise_linux:7::client | Package registry (OSV) |
| suse:nodejs4 | 4.8.7-15.8.1 · SUSE:Linux Enterprise Module for Web and Scripting 12 | Package registry (OSV) |
| suse:nodejs6 | 6.12.2-11.8.1 · SUSE:OpenStack Cloud 7 | Package registry (OSV) |
| suse:openssl | 1.0.1i-54.8.1 · SUSE:OpenStack Cloud 6 | Package registry (OSV) |
| suse:openssl1 | 1.0.1g-0.58.3.1 · 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.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
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: researcher credit · variant or chain candidate · public bounty program.
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- No account or password is required.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- none
- Integrity
- low · data or configuration can be modified
- Availability
- none
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- None
- Integrity impact
- Low
- Availability impact
- None
Weakness class (CWE)
CWE-119 · Improper Restriction of Operations within the Bounds of a Memory BufferCVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
nvd-primary
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 (19 more)Show less
- www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html
- www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.html
- www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html
- www.securityfocus.com/bid/100515
- www.securitytracker.com/id/1039726
- access.redhat.com/errata/RHSA-2018:3221
- access.redhat.com/errata/RHSA-2018:3505
- cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf
- github.com/openssl/openssl/commit/068b963bb7afc57f5bdd723de0dd15e7795d5822
- lists.debian.org/debian-lts-announce/2017/11/msg00011.html
- security.FreeBSD.org/advisories/FreeBSD-SA-17:11.openssl.asc
- security.gentoo.org/glsa/201712-03
- security.netapp.com/advisory/ntap-20170927-0001/
- security.netapp.com/advisory/ntap-20171107-0002/
- support.apple.com/HT208331
- usn.ubuntu.com/3611-2/
- www.debian.org/security/2017/dsa-4017
- www.debian.org/security/2017/dsa-4018
- www.openssl.org/news/secadv/20170828.txt
Vendor advisories and official records. Exploit/PoC links are deliberately left out.