Resource exhaustion in Jenkins
CVE-2021-43859
XStream is an open source java library to serialize objects to XML and back again. Versions prior to 1.4.19 may allow a remote attacker to allocate 100% CPU time on the target system depending on CPU type or parallel execution of such a payload resulting in a denial of service only by manipulating the processed input stream. XStream 1.4.19 monitors and accumulates the time it takes to add elements to collections and throws an exception if a set threshold is exceeded. Users are advised to upgrade as soon as possible. Users unable to upgrade may set the NO_REFERENCE mode to prevent recursion. See GHSA-rmr5-cpv2-vgjf for further details on a workaround if an upgrade is not possible.
Vulnerability class: DoS (Denial of Service)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.079 (94.7th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 95th percentile — 94.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.079 · newest: 0.079 · change: 0.000
Affected products
- Jenkins
- Oracle Commerce Guided Search — versions 11.3.2
- Oracle Communications Brm - Elastic Charging Engine — versions 12.0.0.5.0
- Oracle Communications Cloud Native Core Automated Test Suite — versions 1.9.0
- Oracle Communications Diameter Intelligence Hub
- Oracle Communications Policy Management — versions 12.6.0.0.0
- Oracle Flexcube Private Banking — versions 12.1.0
- Oracle Retail Xstore Point Of Service — versions 16.0.6, 17.0.4, 18.0.3
- X-Stream Xstream — versions < 1.4.19
- Xstream
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/x-stream/xstream/security/advisories/GHSA-rmr5-cpv2-vgjf (Exploit, Third Party Advisory)
- github.com/x-stream/xstream/commit/e8e88621ba1c85ac3b8620337dd672e0c0c3a846 (Patch, Third Party Advisory)
- x-stream.github.io/CVE-2021-43859.html (Exploit, Vendor Advisory)
- www.openwall.com/lists/oss-security/2022/02/09/1 (mailing-list, Mailing List, Third Party Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory, Mailing List)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory, Mailing List)
- lists.debian.org/debian-lts-announce/2022/02/msg00018.html (mailing-list, Mailing List, Third Party Advisory)
- www.oracle.com/security-alerts/cpuapr2022.html (Patch, Third Party Advisory)
- www.oracle.com/security-alerts/cpujul2022.html (Patch, Third Party Advisory)
- af854a3a-2127-422b-91ae-364da2661108
Frequently asked questions
- What is CVE-2021-43859?
- CVE-2021-43859 is a high-severity vulnerability in Jenkins, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2022-02-01.
- How severe is CVE-2021-43859?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2021-43859 known to be exploited?
- 6 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.