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CVE-2021-40110— Apache James IMAP vulnerable to a ReDoS

Quick assessment

Affected
Apache Software Foundation Apache James
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Apache James是美国阿帕奇（Apache）基金会的一个完全用 Java 编写的开源 Smtp 和 Pop3 邮件传输代理和 Nntp 新闻服务器。 Apache James 3.6.1之前版本存在安全漏洞，攻击者可利用该漏洞使用易受攻击的正则表达式编写IMAP列表命令来组织拒绝服务。

AI Predicted 5.3 Difficulty: Easy EPSS 2.86% · P86

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2021-40110

Vulnerability Information
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Vulnerability Title
Apache James IMAP vulnerable to a ReDoS
Source: CVE Program / CVE List V5
Vulnerability Description
In Apache James, using Jazzer fuzzer, we identified that an IMAP user can craft IMAP LIST commands to orchestrate a Denial Of Service using a vulnerable Regular expression. This affected Apache James prior to 3.6.1 We recommend upgrading to Apache James 3.6.1 or higher , which enforce the use of RE2J regular expression engine to execute regex in linear time without back-tracking.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Apache James 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Apache James是美国阿帕奇（Apache）基金会的一个完全用 Java 编写的开源 Smtp 和 Pop3 邮件传输代理和 Nntp 新闻服务器。 Apache James 3.6.1之前版本存在安全漏洞，攻击者可利用该漏洞使用易受攻击的正则表达式编写IMAP列表命令来组织拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Apache Software Foundation Apache James Apache James ~ 3.6.0 -

II. Public POCs for CVE-2021-40110

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III. Intelligence Information for CVE-2021-40110

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Mailing List Discussions for CVE-2021-40110 (2)

Same Patch Batch · Apache Software Foundation · 2022-01-04 · 5 CVEs total

CVE-2021-34797 Apache Geode project log file redaction of sensitive information vulnerability
CVE-2021-38542 Apache James vulnerable to STARTTLS command injection (IMAP and POP3)
CVE-2021-40111 Apache James IMAP parsing Denial Of Service
CVE-2021-40525 Sieve file storage vulnerable to path traversal attacks

IV. Related Vulnerabilities

Same product: Apache James
Same vendor: Apache Software Foundation

V. Comments for CVE-2021-40110

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