#VU36036 Input validation error in Jetty and Fedora - CVE-2018-12545

Vulnerability identifier: #VU36036

Vulnerability risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2018-12545

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Jetty
Server applications / Web servers
Fedora
Operating systems & Components / Operating system

Vendor: Eclipse
Fedoraproject

Description

The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.

In Eclipse Jetty version 9.3.x and 9.4.x, the server is vulnerable to Denial of Service conditions if a remote client sends either large SETTINGs frames container containing many settings, or many small SETTINGs frames. The vulnerability is due to the additional CPU and memory allocations required to handle changed settings.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Jetty: 9.3.0 - 9.4.12

Fedora: 9.3.0 - 28

---

External links
https://bugs.eclipse.org/bugs/show_bug.cgi?id=538096
https://lists.apache.org/thread.html/13f5241048ec0bf966a6ddd306feaf40de5b20e1f09096b9cddeddf2@%3Ccommits.accumulo.apache.org%3E
https://lists.apache.org/thread.html/70744fe4faba8e2fa7e50a7fc794dd03cb28dad8b21e08ee59bb1606@%3Cdevnull.infra.apache.org%3E
https://lists.apache.org/thread.html/9317fd092b257a0815434b116a8af8daea6e920b6673f4fd5583d5fe@%3Ccommits.druid.apache.org%3E
https://lists.apache.org/thread.html/febc94ffec9275dcda64633e0276a1400cd318e571009e4cda9b7a79@%3Cnotifications.accumulo.apache.org%3E
https://lists.apache.org/thread.html/ff8dcfe29377088ab655fda9d585dccd5b1f07fabd94ae84fd60a7f8@%3Ccommits.pulsar.apache.org%3E
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/CIS4LALKZNLF5X5IGNGRSKERG7FY4QG6/
https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html

---

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.