Advisory details:
vulnrichment / CVE-2021-45105
| Advisory ID | vulnrichment/CVE-2021-45105 |
| Aliases | |
| Summary | Apache Log4j2 versions 2.0-alpha1 through 2.16.0 (excluding 2.12.3 and 2.3.1) did not protect from uncontrolled recursion from self-referential lookups. This allows an attacker with control over Thread Context Map data to cause a denial of service when a crafted string is interpreted. This issue was fixed in Log4j 2.17.0, 2.12.3, and 2.3.1. |
| Status | Published |
| Exploitability | 0.5 |
| Weighted Severity | 0.0 |
| Risk | |
| Affected and Fixed Packages | Package Details |
| Introduced and Fixed Package Commit Patches | Package Commit Patches Details |
| CWE-20 | Improper Input Validation |
| CWE-674 | Uncontrolled Recursion |
| System | Score | Found at |
|---|---|---|
| cvssv3.1 | 5.9 | |
| ssvc | Track |
| Reference id | Reference type | URL |
|---|---|---|
| https://cert-portal.siemens.com/productcert/pdf/ssa-501673.pdf | ||
| https://security.netapp.com/advisory/ntap-20211218-0001/ | ||
| https://www.debian.org/security/2021/dsa-5024 | ||
| https://www.zerodayinitiative.com/advisories/ZDI-21-1541/ | ||
| http://www.openwall.com/lists/oss-security/2021/12/19/1 | ||
| 930724 | Advisory | https://www.kb.cert.org/vuls/id/930724 |
| cisco-sa-apache-log4j-qRuKNEbd | Advisory | https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-apache-log4j-qRuKNEbd |
| cpuapr2022.html | Other | https://www.oracle.com/security-alerts/cpuapr2022.html |
| cpujan2022.html | Other | https://www.oracle.com/security-alerts/cpujan2022.html |
| cpujul2022.html | Other | https://www.oracle.com/security-alerts/cpujul2022.html |
| security.html | Other | https://logging.apache.org/log4j/2.x/security.html |
| SNWLID-2021-0032 | Other | https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0032 |
| ssa-479842.pdf | Other | https://cert-portal.siemens.com/productcert/pdf/ssa-479842.pdf |
No EPSS data available for this advisory.
| Patch URL | |
|---|---|
| There are no known patches. | |
| 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/2026-05-29T11:45:21Z/
Decision: Track
Source URL: https://github.com/cisagov/vulnrichment/blob/develop/2021/45xxx/CVE-2021-45105.json
Source Advisory: vulnrichment/CVE-2021-45105
[{'Exploitation': 'none'},
{'Automatable': 'no'},
{'Technical Impact': 'partial'},
{'Mission Prevalence': 'minimal'},
{'Public Well-being Impact': 'material'},
{'Mission & Well-being': 'medium'}]