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githubGitHub Advisory DatabaseGHSA-VP98-W2P3-MV35
HistoryMar 10, 2023 - 3:30 p.m.

Apache Log4j 1.x (EOL) allows Denial of Service (DoS)

2023-03-1015:30:43
CWE-400
CWE-502
GitHub Advisory Database
github.com
18
apache log4j
denial of service
chainsaw
socketappender
hashmap
hashtable
jre
log4j 2.x

CVSS3

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS

0.002

Percentile

58.8%

UNSUPPORTED WHEN ASSIGNED When using the Chainsaw or SocketAppender components with Log4j 1.x on JRE less than 1.7, an attacker that manages to cause a logging entry involving a specially-crafted (ie deeply nested) hashmap or hashtable (depending on which logging component is in use) to be processed could exhaust the available memory in the virtual machine and achieve Denial of Service when the object is deserialized. This issue affects Apache Log4j before 2. Affected users are recommended to update to Log4j 2.x. NOTE: This vulnerability only affects products that are no longer supported by the maintainer.

Affected configurations

Vulners
Node
org.apache.logging.log4j\log4jMatchcore
OR
org.apache.logging.log4j\log4jMatchcore

CVSS3

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS

0.002

Percentile

58.8%