CVE-2020-9493
Java deserialization in Chainsaw
CVE-2020-9493 is a critical vulnerability (CVSS 9.8) in Apache Chainsaw, published June 16, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 4.61%, the 91st percentile. Fixed in log4j:log4j 1.2.15-tuxcare.2.
- Severity
- 9.8 CriticalCVSS 3.1, NVD
- Exploit chance
- 4.61%EPSS, 91st percentile
- Exploitation
- None knownNot on CISA’s or ENISA’s lists
- Fixed in
1.2.15-tuxcare.2log4j:log4j +5 more
Description
A deserialization flaw was found in Apache Chainsaw versions prior to 2.1.0 which could lead to malicious code execution.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
log4j:log4jTuxCare:Maven From an advisory covering 6 CVEs | 1.2.17 up to 1.2.17.tuxcare.1 | 1.2.17.tuxcare.1 |
log4j:log4jTuxCare:Maven From an advisory covering 5 CVEs | 1.2.16 up to 1.2.16-tuxcare.1 | 1.2.16-tuxcare.1 |
log4j:log4jTuxCare:Maven | 1.2.15 up to 1.2.15-tuxcare.2, plus listed versions 1.2.15-tuxcare.1 | 1.2.15-tuxcare.2 |
log4j:log4jTuxCare:Maven | 1.2.12 up to 1.2.12-tuxcare.2, plus listed versions 1.2.12-tuxcare.1 | 1.2.12-tuxcare.2 |
log4j:log4jTuxCare:Maven | 1.2.13 up to 1.2.13-tuxcare.2, plus listed versions 1.2.13-tuxcare.1 | 1.2.13-tuxcare.2 |
log4j:log4jTuxCare:Maven From an advisory covering 3 CVEs | 1.2.14 up to 1.2.14-tuxcare.3, plus listed versions 1.2.14-tuxcare.11.2.14-tuxcare.2 | 1.2.14-tuxcare.3 |
What each source reports
NVD Score used
A deserialization flaw was found in Apache Chainsaw versions prior to 2.1.0 which could lead to malicious code execution.
- Record
CVE-2020-9493- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 6.8 Medium
AV:N/AC:M/Au:N/C:P/I:P/A:P - Weakness
- CWE-502
- Updated
- 2026-11-02
CVE List
Java deserialization in Chainsaw
A deserialization flaw was found in Apache Chainsaw versions prior to 2.1.0 which could lead to malicious code execution.
- Record
CVE-2020-9493- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-502, CWE-502
- Updated
- 2026-11-02
EUVDEUVD-2020-30300
A deserialization flaw was found in Apache Chainsaw versions prior to 2.1.0 which could lead to malicious code execution.
- Record
EUVD-2020-30300- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-prp9-9gxw-38j8
A deserialization flaw was found in Apache Chainsaw versions prior to 2.1.0 which could lead to...
A deserialization flaw was found in Apache Chainsaw versions prior to 2.1.0 which could lead to malicious code execution.
- Record
GHSA-prp9-9gxw-38j8- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-502
- Updated
- 2026-11-02
OSV
A deserialization flaw was found in Apache Chainsaw versions prior to 2.1.0 which could lead to malicious code execution.
- Record
CVE-2020-9493- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
OSVCLSA-2025-1751328204No score
TuxCare security update for log4j:log4j (6 CVEs)
TuxCare rebuilt log4j:log4j to address 6 CVEs. Fixed in 1.2.17.tuxcare.1.
- Record
CLSA-2025-1751328204- Updated
- 2026-11-02
Show 5 moreShow less
OSVCLSA-2026-1778114668No score
TuxCare security update for log4j:log4j (5 CVEs)
TuxCare rebuilt log4j:log4j to address 5 CVEs. Fixed in 1.2.16-tuxcare.1.
- Record
CLSA-2026-1778114668- Updated
- 2026-11-02
OSVCLSA-2026-1787931543No score
TuxCare security update for log4j:log4j (1 CVE)
TuxCare rebuilt log4j:log4j to address 1 CVE. Fixed in 1.2.15-tuxcare.2.
- Record
CLSA-2026-1787931543- Updated
- 2026-11-02
OSVCLSA-2026-1790602996No score
TuxCare security update for log4j:log4j (1 CVE)
TuxCare rebuilt log4j:log4j to address 1 CVE. Fixed in 1.2.12-tuxcare.2.
- Record
CLSA-2026-1790602996- Updated
- 2026-11-02
OSVCLSA-2026-1791960488No score
TuxCare security update for log4j:log4j (1 CVE)
TuxCare rebuilt log4j:log4j to address 1 CVE. Fixed in 1.2.13-tuxcare.2.
- Record
CLSA-2026-1791960488- Updated
- 2026-11-02
OSVCLSA-2026-1794273742No score
TuxCare security update for log4j:log4j (3 CVEs)
TuxCare rebuilt log4j:log4j to address 3 CVEs. Fixed in 1.2.14-tuxcare.3.
- Record
CLSA-2026-1794273742- Updated
- 2026-11-10
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, aliases | OSV | |
| affected, facts | ||
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
References
openwall.com/lists/oss-security/2021/06/16/1
lists.apache.org/thread.html/r50d389c613ba6062a26aa57e163c09bfee4ff2d95d67331d75265b83%40%3Cannounce.apache.org%3E
nvd.nist.gov/vuln/detail/CVE-2020-9493
github.com/advisories/GHSA-prp9-9gxw-38j8