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Advisory details: gitlab / maven/org.apache.logging.log4j/log4j/CVE-2021-4104
Advisory ID gitlab/maven/org.apache.logging.log4j/log4j/CVE-2021-4104
Aliases CVE-2021-4104
Summary Deserialization of Untrusted Data JMSAppender in Log4j is vulnerable to deserialization of untrusted data when the attacker has write access to the Log4j configuration. The attacker can provide `TopicBindingName` and `TopicConnectionFactoryBindingName` configurations causing JMSAppender to perform JNDI requests that result in remote code execution in a similar fashion to CVE-2021-44228. Note this issue only affects Log4j when specifically configured to use JMSAppender, which is not the default. Apache Log4j reached end of life in August Users should upgrade to Log4j 2 as it addresses numerous other issues from the previous versions.
Status Published
Exploitability 2.0
Weighted Severity 0.0
Risk
Affected and Fixed Packages Package Details
Introduced and Fixed Package Commit Patches Package Commit Patches Details
Weaknesses (3)
CWE-502 Deserialization of Untrusted Data
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
cvssv2 https://gitlab.com/gitlab-org/advisories-community/-/blob/main/maven/org.apache.logging.log4j/log4j/CVE-2021-4104.yml
cvssv3.1 https://gitlab.com/gitlab-org/advisories-community/-/blob/main/maven/org.apache.logging.log4j/log4j/CVE-2021-4104.yml
Reference id Reference type URL
https://github.com/apache/logging-log4j2/pull/608#issuecomment-990494126
930724 Advisory https://www.kb.cert.org/vuls/id/930724
CVE-2021-4104 https://access.redhat.com/security/cve/CVE-2021-4104
CVE-2021-4104 https://nvd.nist.gov/vuln/detail/CVE-2021-4104
CVERecord?id=CVE-2021-44228 Other https://www.cve.org/CVERecord?id=CVE-2021-44228
No exploits are available.

No EPSS data available for this advisory.

Patch URL
There are no known patches.
Vector: AV:N/AC:M/Au:S/C:P/I:P/A:P Found at https://gitlab.com/gitlab-org/advisories-community/-/blob/main/maven/org.apache.logging.log4j/log4j/CVE-2021-4104.yml
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H Found at https://gitlab.com/gitlab-org/advisories-community/-/blob/main/maven/org.apache.logging.log4j/log4j/CVE-2021-4104.yml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none

Vector: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2023-12-20T16:29:18Z/

Decision: Track

Source URL: https://github.com/cisagov/vulnrichment/blob/develop/2021/4xxx/CVE-2021-4104.json

Source Advisory: vulnrichment/CVE-2021-4104

View SSVC decision tree 
[{'Exploitation': 'none'},
 {'Automatable': 'no'},
 {'Technical Impact': 'partial'},
 {'Mission Prevalence': 'minimal'},
 {'Public Well-being Impact': 'material'},
 {'Mission & Well-being': 'medium'}]