CVE-2017-5645: In Apache Log4j 2.x before 2.8.2, when using the TCP socket server or UDP socket server to receive serialized log events from another…
Noroxi assessment
Priority: This week (action score 66/100)
- A ready-made attack module is public (Nuclei); exploiting it takes no special expertise.
- Public proof-of-concept code exists (GitHub); there is no record of exploitation in the wild.
- Probability of exploitation in the next 30 days: 89.3% (FIRST EPSS); higher than 99.7% 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.
- According to CISA the attack is automatable: targets can be found by mass scanning.
- Fixed version: apache-log4j2 (Debian:12) 2.7-2; org.apache.logging.log4j:log4j (Maven) 2.8.2; org.apache.logging.log4j:log4j-core (Maven) 2.8.2.
- Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).
Don’t wait for the next maintenance window. Upgrade to apache-log4j2 (Debian:12) 2.7-2; org.apache.logging.log4j:log4j (Maven) 2.8.2; org.apache.logging.log4j:log4j-core (Maven) 2.8.2 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
In Apache Log4j 2.x before 2.8.2, when using the TCP socket server or UDP socket server to receive serialized log events from another application, a specially crafted binary payload can be sent that, when deserialized, can execute arbitrary code.
- Published
- Apr 17, 2017
- Updated
- Oct 8, 2026
- EPSS
- 89.3% · 99th percentile
- CWE
- CWE-502
Report tools
Action score
66
Don’t wait for the next maintenance window.
- CVSS
- 39 / 40 · 9.8 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 27 / 30 · 89.3%
CISA SSVC decision
- Exploitation
- none
- Automatable
- yes
- 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
- 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 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 |
|---|---|---|
| apache | log4j | cpe:2.3:a:apache:log4j |
| netapp | oncommand api services | cpe:2.3:a:netapp:oncommand_api_services |
| netapp | oncommand insight | cpe:2.3:a:netapp:oncommand_insight |
| netapp | oncommand workflow automation | cpe:2.3:a:netapp:oncommand_workflow_automation |
| netapp | service level manager | cpe:2.3:a:netapp:service_level_manager |
| netapp | snapcenter | cpe:2.3:a:netapp:snapcenter |
| netapp | storage automation store | cpe:2.3:a:netapp:storage_automation_store |
| redhat | fuse | cpe:2.3:a:redhat:fuse |
| redhat | enterprise linux | cpe:2.3:o:redhat:enterprise_linux |
| redhat | enterprise linux desktop | cpe:2.3:o:redhat:enterprise_linux_desktop |
| redhat | enterprise linux server | cpe:2.3:o:redhat:enterprise_linux_server |
| redhat | enterprise linux server aus | cpe:2.3:o:redhat:enterprise_linux_server_aus |
and 67 more
Versions reported by the vendor
Affected version ranges reported by the assigning authority (apache). Independent of NVD's CPE analysis and usually ahead of it.
Apache Software Foundation Apache Log4j
- All versions between 2.0-alpha1 and 2.8.1affected
Affected versions · NVD (20)
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- apache log4j2.0 and later · before 2.8.2
- netapp oncommand api servicesall versions
- netapp oncommand insightall versions
- netapp oncommand workflow automationall versions
- netapp service level managerall versions
- netapp snapcenterall versions
- netapp storage automation storeall versions
- oracle api gateway11.1.2.4.0
- oracle application testing suite13.3.0.1
- oracle autovue vuelink integration21.0.0
- oracle autovue vuelink integration21.0.1
- oracle banking platform2.6.0
- oracle banking platform2.6.1
- oracle banking platform2.6.2
- oracle bi publisher11.1.1.7.0
- oracle bi publisher11.1.1.9.0
- oracle bi publisher12.2.1.3.0
- oracle bi publisher12.2.1.4.0
- oracle communications converged application server - service controller6.1
- oracle communications instant messaging server10.0.1.3.0
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:12 | apache-log4j2 | before 2.7-2 | 2.7-2 |
| Maven | org.apache.logging.log4j:log4j | from 2.0 · before 2.8.2 | 2.8.2 |
| Maven | org.apache.logging.log4j:log4j-core | from 2.0 · before 2.8.2 | 2.8.2 |
| Red Hat:enterprise_linux:7::client | log4j | before 0:1.2.17-16.el7_4 | 0:1.2.17-16.el7_4 |
| Red Hat:enterprise_linux:7::client | log4j-javadoc | before 0:1.2.17-16.el7_4 | 0:1.2.17-16.el7_4 |
| Red Hat:enterprise_linux:7::client | log4j-manual | before 0:1.2.17-16.el7_4 | 0:1.2.17-16.el7_4 |
| Red Hat:jboss_enterprise_application_platform:5::el5 | log4j | before 0:1.2.14-19.patch_01.ep5.el5 | 0:1.2.14-19.patch_01.ep5.el5 |
| Red Hat:jboss_enterprise_application_platform:5::el6 | log4j | before 0:1.2.14-19.patch_01.ep5.el6 | 0:1.2.14-19.patch_01.ep5.el6 |
| Red Hat:jboss_enterprise_application_platform:6::el5 | apache-cxf | before 0:2.7.18-7.SP6_redhat_1.1.ep6.el5 | 0:2.7.18-7.SP6_redhat_1.1.ep6.el5 |
| Red Hat:jboss_enterprise_application_platform:6::el5 | codehaus-jackson | before 0:1.9.9-11.redhat_5.1.ep6.el5 | 0:1.9.9-11.redhat_5.1.ep6.el5 |
| Red Hat:jboss_enterprise_application_platform:6::el5 | codehaus-jackson-core-asl | before 0:1.9.9-11.redhat_5.1.ep6.el5 | 0:1.9.9-11.redhat_5.1.ep6.el5 |
| Red Hat:jboss_enterprise_application_platform:6::el5 | codehaus-jackson-jaxrs | before 0:1.9.9-11.redhat_5.1.ep6.el5 | 0:1.9.9-11.redhat_5.1.ep6.el5 |
| Red Hat:jboss_enterprise_application_platform:6::el5 | codehaus-jackson-mapper-asl | before 0:1.9.9-11.redhat_5.1.ep6.el5 | 0:1.9.9-11.redhat_5.1.ep6.el5 |
| Red Hat:jboss_enterprise_application_platform:6::el5 | codehaus-jackson-xc | before 0:1.9.9-11.redhat_5.1.ep6.el5 | 0:1.9.9-11.redhat_5.1.ep6.el5 |
| Red Hat:jboss_enterprise_application_platform:6::el5 | hibernate4-core-eap6 | before 0:4.2.27-1.Final_redhat_1.1.ep6.el5 | 0:4.2.27-1.Final_redhat_1.1.ep6.el5 |
| Red Hat:jboss_enterprise_application_platform:6::el5 | hibernate4-eap6 | before 0:4.2.27-1.Final_redhat_1.1.ep6.el5 | 0:4.2.27-1.Final_redhat_1.1.ep6.el5 |
| Red Hat:jboss_enterprise_application_platform:6::el5 | hibernate4-entitymanager-eap6 | before 0:4.2.27-1.Final_redhat_1.1.ep6.el5 | 0:4.2.27-1.Final_redhat_1.1.ep6.el5 |
| Red Hat:jboss_enterprise_application_platform:6::el5 | hibernate4-envers-eap6 | before 0:4.2.27-1.Final_redhat_1.1.ep6.el5 | 0:4.2.27-1.Final_redhat_1.1.ep6.el5 |
| Red Hat:jboss_enterprise_application_platform:6::el5 | hibernate4-infinispan-eap6 | before 0:4.2.27-1.Final_redhat_1.1.ep6.el5 | 0:4.2.27-1.Final_redhat_1.1.ep6.el5 |
| Red Hat:jboss_enterprise_application_platform:6::el5 | hornetq | before 0:2.3.25-22.SP20_redhat_1.1.ep6.el5 | 0:2.3.25-22.SP20_redhat_1.1.ep6.el5 |
| Red Hat:jboss_enterprise_application_platform:6::el5 | infinispan | before 0:5.2.22-1.Final_redhat_1.1.ep6.el5 | 0:5.2.22-1.Final_redhat_1.1.ep6.el5 |
| Red Hat:jboss_enterprise_application_platform:6::el5 | infinispan-cachestore-jdbc | before 0:5.2.22-1.Final_redhat_1.1.ep6.el5 | 0:5.2.22-1.Final_redhat_1.1.ep6.el5 |
| Red Hat:jboss_enterprise_application_platform:6::el5 | infinispan-cachestore-remote | before 0:5.2.22-1.Final_redhat_1.1.ep6.el5 | 0:5.2.22-1.Final_redhat_1.1.ep6.el5 |
| Red Hat:jboss_enterprise_application_platform:6::el5 | infinispan-client-hotrod | before 0:5.2.22-1.Final_redhat_1.1.ep6.el5 | 0:5.2.22-1.Final_redhat_1.1.ep6.el5 |
+96
Same product
apache: all recordsOther highest-scoring records for the same primary product.
- CVE-2021-44228Apache Log4j2 JNDI features do not protect against attacker controlled LDAP and other JNDI related endpointsKEV100Now
- CVE-2021-45046Apache Log4j2 Thread Context Message Pattern and Context Lookup Pattern vulnerable to a denial of service attackKEV96Now
- CVE-2019-17571Included in Log4j 1.2 is a SocketServer class that is vulnerable to deserialization of untrusted data which can be exploited to remotely…60This week
Published before and after this one in the same product
- Later →CVE-2020-9488Apr 27, 2020 · Improper validation of certificate with host mismatch in Apache Log4j SMTP appender.16Monitor
- Later →CVE-2021-4104Dec 14, 2021 · Deserialization of untrusted data in JMSAppender in Apache Log4j 1.254Plan
- Later →CVE-2021-45105Dec 18, 2021 · Apache Log4j2 does not always protect from infinite recursion in lookup evaluation53Plan
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:apache-log4j2 | 2.7-2 · Debian:12 | Package registry (OSV) |
| Maven:org.apache.logging.log4j:log4j | 2.8.2 | Package registry (OSV) |
| Maven:org.apache.logging.log4j:log4j-core | 2.8.2 | Package registry (OSV) |
| red hat:log4j-eap6 | 0:1.2.16-12.redhat_3.1.ep6.el6 · Red Hat:jboss_enterprise_web_server:3.1::el6 | Package registry (OSV) |
| red hat:rh-java-common-log4j | 0:1.2.17-15.15.el6 · Red Hat:rhel_software_collections:2::el6 | Package registry (OSV) |
| red hat:rh-java-common-log4j-javadoc | 0:1.2.17-15.15.el6 · Red Hat:rhel_software_collections:2::el6 | Package registry (OSV) |
| red hat:rh-java-common-log4j-manual | 0:1.2.17-15.15.el6 · Red Hat:rhel_software_collections:2::el6 | Package registry (OSV) |
| red hat:tomcat-native | 0:1.2.8-10.redhat_10.ep7.el6 · Red Hat:jboss_enterprise_web_server:3.1::el6 | Package registry (OSV) |
| red hat:tomcat-native-debuginfo | 0:1.2.8-10.redhat_10.ep7.el6 · Red Hat:jboss_enterprise_web_server:3.1::el6 | Package registry (OSV) |
| red hat:tomcat7 | 0:7.0.70-22.ep7.el6 · Red Hat:jboss_enterprise_web_server:3.1::el6 | Package registry (OSV) |
| red hat:tomcat7-admin-webapps | 0:7.0.70-22.ep7.el6 · Red Hat:jboss_enterprise_web_server:3.1::el6 | Package registry (OSV) |
| red hat:tomcat7-docs-webapp | 0:7.0.70-22.ep7.el6 · Red Hat:jboss_enterprise_web_server:3.1::el6 | Package registry (OSV) |
| red hat:tomcat7-el-2.2-api | 0:7.0.70-22.ep7.el6 · Red Hat:jboss_enterprise_web_server:3.1::el6 | Package registry (OSV) |
| red hat:tomcat7-javadoc | 0:7.0.70-22.ep7.el6 · Red Hat:jboss_enterprise_web_server:3.1::el6 | Package registry (OSV) |
| red hat:tomcat7-jsp-2.2-api | 0:7.0.70-22.ep7.el6 · Red Hat:jboss_enterprise_web_server:3.1::el6 | 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
- Nuclei detection template ×1
- Proof-of-concept repository on GitHub ×2
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 |
|---|---|---|
| Nuclei detection template | Nuclei template CVE-2017-5645 | — |
| Proof-of-concept repository on GitHub | stars:92 | 2017-08-04 |
| Proof-of-concept repository on GitHub | stars:39 | 2021-12-14 |
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.
- Published
- First PoC+108 d
- TodayNov 13, 2026+3497 d
National notice (Türkiye Cybersecurity Directorate / USOM)
Official security notices citing this record; remediation advice is on the agency's page.
- TR-21-0331 · Apr 21, 2021(Oracle Güvenlik Uyarısı Yayınladı)
Not on record for this CVE: EPSS history · 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.
- No account or password is required.
- 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
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
Weakness class (CWE)
CWE-502 · Deserialization of Untrusted DataCVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
nvd-primary
Root cause
Data received over the network is deserialized into the language’s native object format without verifying its source. Code paths inside the object can be triggered during deserialization.
The bug in code
The whole CWE-502 classA representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.
Vulnerable
payload = sock.recv(65536)
job = pickle.loads(payload)Fixed
payload = sock.recv(65536)
if not hmac.compare_digest(sign(payload), header_sig):
raise PermissionError("invalid signature")
job = JobSchema.validate(json.loads(payload))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 (2)
- SSVC exploitation— → none
- 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/cpuapr2018-3678067.html
- 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/97702
- www.securitytracker.com/id/1040200
- www.securitytracker.com/id/1041294
- access.redhat.com/errata/RHSA-2017:1417
- access.redhat.com/errata/RHSA-2017:1801
- access.redhat.com/errata/RHSA-2017:1802
- access.redhat.com/errata/RHSA-2017:2423
- access.redhat.com/errata/RHSA-2017:2633
- access.redhat.com/errata/RHSA-2017:2635
- access.redhat.com/errata/RHSA-2017:2636
- access.redhat.com/errata/RHSA-2017:2637
- access.redhat.com/errata/RHSA-2017:2638
- access.redhat.com/errata/RHSA-2017:2808
- access.redhat.com/errata/RHSA-2017:2809
- access.redhat.com/errata/RHSA-2017:2810
Vendor advisories and official records. Exploit/PoC links are deliberately left out.