CVE catalog
CVE-2021-45105
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 Threa
- Severity
- High · CVSS 7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Published
- Updated
- Source
- [NVD] · [CVE record]
- EPSS
- 100.00% · Oct 25, 2026
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.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | apache-log4j2 | sid | 2.26.1-1 | fixed |
| Debian | apache-log4j2 | forky | 2.19.0-2 | fixed |
| Debian | apache-log4j2 | trixie | 2.19.0-2 | fixed |
| Debian | apache-log4j2 | bookworm | 2.19.0-2 | fixed |
| Cpe | log4j | Not reported | 2.3.1 | fixed |
| Cpe | log4j | Not reported | 2.12.3 | fixed |
| Cpe | log4j | Not reported | Not reported | unknown |
| Cpe | cloud_manager | Not reported | Not reported | unknown |
| Cpe | debian_linux | Not reported | Not reported | unknown |
| Cpe | debian_linux | Not reported | Not reported | unknown |
| Cpe | email_security | Not reported | Not reported | unknown |
| Cpe | network_security_manager | Not reported | 3.0 | fixed |
| Cpe | network_security_manager | Not reported | 3.0 | fixed |
| Cpe | web_application_firewall | Not reported | 3.1.0 | fixed |
| Cpe | 6bk1602-0aa12-0tp0_firmware | Not reported | 2.7.0 | fixed |
| Cpe | 6bk1602-0aa22-0tp0_firmware | Not reported | 2.7.0 | fixed |
| Cpe | 6bk1602-0aa32-0tp0_firmware | Not reported | 2.7.0 | fixed |
| Cpe | 6bk1602-0aa42-0tp0_firmware | Not reported | 2.7.0 | fixed |
| Cpe | 6bk1602-0aa52-0tp0_firmware | Not reported | 2.7.0 | fixed |
| Cpe | agile_engineering_data_management | Not reported | Not reported | unknown |
| Cpe | agile_plm_mcad_connector | Not reported | Not reported | unknown |
| Cpe | agile_product_lifecycle_management | Not reported | Not reported | unknown |
| Cpe | autovue_for_agile_product_lifecycle_management | Not reported | Not reported | unknown |
| Cpe | banking_deposits_and_lines_of_credit_servicing | Not reported | Not reported | unknown |
| Ubuntu | apache-log4j2 | pro | 2.2-1 | vulnerable |
| Ubuntu | apache-log4j2 | pro | 2.4-1 | vulnerable |
| Ubuntu | apache-log4j2 | pro | 2.4-2 | vulnerable |
| Ubuntu | apache-log4j2 | pro | 2.4-2ubuntu0.1~esm1 | vulnerable |
| Ubuntu | apache-log4j2 | 18.04 | 2.8.2-1 | vulnerable |
| Ubuntu | apache-log4j2 | 18.04 | 2.8.2-2 | vulnerable |
| Ubuntu | apache-log4j2 | 18.04 | 2.10.0-1 | vulnerable |
| Ubuntu | apache-log4j2 | 18.04 | 2.10.0-2 | vulnerable |
| Ubuntu | apache-log4j2 | 18.04 | 2.10.0-2ubuntu0.1 | vulnerable |
| Ubuntu | apache-log4j2 | 18.04 | 2.12.4-0ubuntu0.1 | fixed |
| Ubuntu | apache-log4j2 | 20.04 | 2.11.1-2 | vulnerable |
| Ubuntu | apache-log4j2 | 20.04 | 2.11.2-1 | vulnerable |
| Ubuntu | apache-log4j2 | 20.04 | 2.15.0-0.20.04.1 | vulnerable |
| Ubuntu | apache-log4j2 | 20.04 | 2.16.0-0.20.04.1 | vulnerable |
| Ubuntu | apache-log4j2 | 20.04 | 2.17.0-0.20.04.1 | fixed |
| Ubuntu | apache-log4j2 | 20.04 | 2.11.1-2 | vulnerable |
| Ubuntu | apache-log4j2 | 20.04 | 2.11.2-1 | vulnerable |
| Ubuntu | apache-log4j2 | 20.04 | 2.15.0-0.20.04.1 | vulnerable |
| Ubuntu | apache-log4j2 | 20.04 | 2.16.0-0.20.04.1 | vulnerable |
| Ubuntu | apache-log4j2 | 20.04 | 2.17.0-0.20.04.1 | fixed |
| Opensuse | log4j | leap 15.2 | 2.17.0-lp152.3.12.1 | fixed |
| Opensuse | log4j | leap 15.3 | 2.17.0-4.13.1 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | apache-log4j2 | source | sid | 2.17.0-1 | not yet assigned | Not reported | [1001891] |
| Debian | apache-log4j2 | source | forky | 2.17.0-1 | not yet assigned | Not reported | [1001891] |
| Debian | apache-log4j2 | source | trixie | 2.17.0-1 | not yet assigned | Not reported | [1001891] |
| Debian | apache-log4j2 | source | bookworm | 2.17.0-1 | not yet assigned | Not reported | [1001891] |
| Cpe | log4j | cpe | Not reported | 2.3.1 | Not reported | NVD-CVE-2021-45105 | Not reported |
| Cpe | log4j | cpe | Not reported | 2.12.3 | Not reported | NVD-CVE-2021-45105 | Not reported |
| Cpe | network_security_manager | cpe | Not reported | 3.0 | Not reported | NVD-CVE-2021-45105 | Not reported |
| Cpe | network_security_manager | cpe | Not reported | 3.0 | Not reported | NVD-CVE-2021-45105 | Not reported |
| Cpe | web_application_firewall | cpe | Not reported | 3.1.0 | Not reported | NVD-CVE-2021-45105 | Not reported |
| Cpe | 6bk1602-0aa12-0tp0_firmware | cpe | Not reported | 2.7.0 | Not reported | NVD-CVE-2021-45105 | Not reported |
| Cpe | 6bk1602-0aa22-0tp0_firmware | cpe | Not reported | 2.7.0 | Not reported | NVD-CVE-2021-45105 | Not reported |
| Cpe | 6bk1602-0aa32-0tp0_firmware | cpe | Not reported | 2.7.0 | Not reported | NVD-CVE-2021-45105 | Not reported |
| Cpe | 6bk1602-0aa42-0tp0_firmware | cpe | Not reported | 2.7.0 | Not reported | NVD-CVE-2021-45105 | Not reported |
| Cpe | 6bk1602-0aa52-0tp0_firmware | cpe | Not reported | 2.7.0 | Not reported | NVD-CVE-2021-45105 | Not reported |
| Ubuntu | apache-log4j2 | deb | 18.04 | 2.12.4-0ubuntu0.1 | Not reported | UBUNTU-CVE-2021-45105 | Not reported |
| Ubuntu | apache-log4j2 | deb | 20.04 | 2.17.0-0.20.04.1 | Not reported | UBUNTU-CVE-2021-45105 | Not reported |
| Ubuntu | apache-log4j2 | deb | 20.04 | 2.17.0-0.20.04.1 | Not reported | USN-5203-1 | Not reported |
| Opensuse | log4j | rpm | leap 15.2 | 2.17.0-lp152.3.12.1 | Not reported | OPENSUSE-SU-2021:1605-1 | Not reported |
| Opensuse | log4j | rpm | leap 15.3 | 2.17.0-4.13.1 | Not reported | OPENSUSE-SU-2021:4118-1 | Not reported |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [liblog4j2-java]Fixed
Source package: [apache-log4j2]
Details (2)
2.19.0-2· all · bookwormFixed · Fixed:
2.17.0-1nvd · apache-log4j2 · debian · bookworm; nvd · apache-log4j2 · debian · 12
2.19.0-2· all · bookwormFixed · Fixed:
2.17.0-1nvd · apache-log4j2 · debian · bookworm; nvd · apache-log4j2 · debian · 12
[Debian 13 (Trixie)]
- [liblog4j2-java]Fixed
Source package: [apache-log4j2]
Details (2)
2.19.0-2· all · trixieFixed · Fixed:
2.17.0-1nvd · apache-log4j2 · debian · 13
2.19.0-2· all · trixieFixed · Fixed:
2.17.0-1nvd · apache-log4j2 · debian · 13
Observed:
References
- [https://ftp.suse.com/pub/projects/security/csaf/opensuse-su-2021_1605-1.json]
- [https://nvd.nist.gov/vuln/detail/CVE-2021-45105]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2021-45105]
- [https://osv.dev/vulnerability/DSA-5024-1]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2021-45105]
- [https://osv.dev/vulnerability/USN-5203-1]
- [https://osv.dev/vulnerability/openSUSE-SU-2021:1605-1]
- [https://osv.dev/vulnerability/openSUSE-SU-2021:4118-1]
- [https://security-tracker.debian.org/tracker/CVE-2021-45105]
- [https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-45105.json]
- [https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-0162.json]
[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]