CVE-2017-5645
CriticalIn 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 21, 2021 · Updated Oct 10, 2026 · Also known as DEBIAN-CVE-2017-5645, GHSA-fxph-q3j8-mv87, UBUNTU-CVE-2017-5645
Key Facts
Patch immediately- CVE-2017-5645 is a critical-severity vulnerability (CVSS 9.8 v3.1) affecting Log4j (Apache), Oncommand API Services (Netapp), Oncommand Insight (Netapp) and 22 more products.
- It is not listed in any known-exploited vulnerabilities catalog. No public exploit code is known.
- EPSS estimates a 90% probability of exploitation in the next 30 days.
- Fixed versions are available, including Log4j 2.8.2, Log4j 0:1.2.14-19.patch_01.ep5.el5, Log4j 0:1.2.14-19.patch_01.ep5.el6.
- Brandefense priority: patch immediately, because it is very likely to be exploited soon.
CVSS v3.1
9.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
90%
Higher than 99.7% of all scored CVEs
Exploited in the wild
No known
Not in a known-exploited catalog
Public exploit code
None known
Get the full CVE-2017-5645 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
Description
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.
Affected Products
480 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Log4jApache | >= All versions between 2.0-alpha1 and 2.8.1 | 2.8.2 |
| Oncommand API ServicesNetapp | See advisory | n/a |
| Oncommand InsightNetapp | See advisory | n/a |
| Oncommand Workflow AutomationNetapp | See advisory | n/a |
| Service Level ManagerNetapp | See advisory | n/a |
Patched Releases
Log4j
2.8.2, 0:1.2.14-19.patch_01.ep5.el5, 0:1.2.14-19.patch_01.ep5.el6, 0:1.2.17-16.el7_4, 1.2.14-6.4.2.el6_10, 1.2.17-16.12.amzn1, 1.2.17-16.el7_4, 1.2.17-17.amzn2
apache-cxf
0:2.7.18-7.SP6_redhat_1.1.ep6.el5, 0:2.7.18-7.SP6_redhat_1.1.ep6.el6, 0:2.7.18-7.SP6_redhat_1.1.ep6.el7
apache-log4j2
2.7-2
codehaus-jackson
0:1.9.9-11.redhat_5.1.ep6.el5, 0:1.9.9-11.redhat_5.1.ep6.el6, 0:1.9.9-11.redhat_5.1.ep6.el7
eap7-artemis-native
0:1.1.0-13.redhat_4.ep7.el6, 0:1.1.0-13.redhat_4.ep7.el7
eap7-bouncycastle
0:1.56.0-3.redhat_2.2.ep7.el6, 0:1.56.0-3.redhat_2.2.ep7.el7
eap7-hibernate-validator
0:5.2.5-2.Final_redhat_2.1.ep7.el6, 0:5.2.5-2.Final_redhat_2.1.ep7.el7
eap7-jasypt
0:1.9.2-2.redhat_1.1.ep7.el6, 0:1.9.2-2.redhat_1.1.ep7.el7
eap7-jboss-ec2-eap
0:7.0.8-1.GA_redhat_1.ep7.el6, 0:7.0.8-1.GA_redhat_1.ep7.el7
eap7-jboss-jms-api_2.0_spec
0:1.0.1-2.Final_redhat_1.1.ep7.el6, 0:1.0.1-2.Final_redhat_1.1.ep7.el7
eap7-jboss-logmanager
0:2.0.7-2.Final_redhat_1.1.ep7.el6, 0:2.0.7-2.Final_redhat_1.1.ep7.el7
eap7-jboss-metadata
0:10.0.2-2.Final_redhat_1.1.ep7.el6, 0:10.0.2-2.Final_redhat_1.1.ep7.el7
eap7-jboss-remote-naming
0:2.0.5-1.Final_redhat_1.1.ep7.el6, 0:2.0.5-1.Final_redhat_1.1.ep7.el7
eap7-jboss-remoting
0:4.0.24-1.Final_redhat_1.1.ep7.el6, 0:4.0.24-1.Final_redhat_1.1.ep7.el7
eap7-log4j-jboss-logmanager
0:1.1.4-2.Final_redhat_1.1.ep7.el6, 0:1.1.4-2.Final_redhat_1.1.ep7.el7
eap7-picketlink-bindings
0:2.5.5-9.SP8_redhat_1.1.ep7.el6, 0:2.5.5-9.SP8_redhat_1.1.ep7.el7
eap7-picketlink-federation
0:2.5.5-9.SP8_redhat_1.1.ep7.el6, 0:2.5.5-9.SP8_redhat_1.1.ep7.el7
eap7-undertow
0:1.3.31-1.Final_redhat_1.1.ep7.el6, 0:1.3.31-1.Final_redhat_1.1.ep7.el7
eap7-wildfly
0:7.0.8-4.GA_redhat_1.1.ep7.el6, 0:7.0.8-4.GA_redhat_1.1.ep7.el7
eap7-wildfly-javadocs
0:7.0.8-1.GA_redhat_1.1.ep7.el6, 0:7.0.8-1.GA_redhat_1.1.ep7.el7
hibernate4-eap6
0:4.2.27-1.Final_redhat_1.1.ep6.el5, 0:4.2.27-1.Final_redhat_1.1.ep6.el6, 0:4.2.27-1.Final_redhat_1.1.ep6.el7
hornetq
0:2.3.25-22.SP20_redhat_1.1.ep6.el5, 0:2.3.25-22.SP20_redhat_1.1.ep6.el6, 0:2.3.25-22.SP20_redhat_1.1.ep6.el7
infinispan
0:5.2.22-1.Final_redhat_1.1.ep6.el5, 0:5.2.22-1.Final_redhat_1.1.ep6.el6, 0:5.2.22-1.Final_redhat_1.1.ep6.el7
jboss-as-appclient
0:7.5.17-2.Final_redhat_4.1.ep6.el5, 0:7.5.17-2.Final_redhat_4.1.ep6.el6, 0:7.5.17-2.Final_redhat_4.1.ep6.el7
jboss-as-cli
0:7.5.17-2.Final_redhat_4.1.ep6.el5, 0:7.5.17-2.Final_redhat_4.1.ep6.el6, 0:7.5.17-2.Final_redhat_4.1.ep6.el7
Timeline
Publicly disclosed
Apr 21, 2021
Last updated
Oct 10, 2026
Weakness Type
- CWE-502 Deserialization of Untrusted Data
References
- advisoryRHSA-2021:3140
- advisoryGHSA advisory
- advisoryhttps://git-wip-us.apache.org/repos/asf?p=logging-log4j2.git;h=5dcc192
- advisoryhttps://nvd.nist.gov/vuln/detail/CVE-2017-5645
- advisoryhttps://security.netapp.com/advisory/ntap-20180726-0002/
FAQ
Common Questions.
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.
Affected: Log4j (Apache) versions >= All versions between 2.0-alpha1 and 2.8.1; Oncommand API Services (Netapp); Oncommand Insight (Netapp), among others. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
No public exploit code is known.
Fixed versions are available, including Log4j 2.8.2, Log4j 0:1.2.14-19.patch_01.ep5.el5, Log4j 0:1.2.14-19.patch_01.ep5.el6.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.
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