Vulnerability identifier: #VU48942

Vulnerability risk: Low

CVSSv3.1: 6.8 [CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-27216

CWE-ID: CWE-362

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Jetty
Server applications / Web servers

Vendor: Eclipse

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a race condition. On Unix like systems, the system's temporary directory is shared between all users on that system. A collocated user can observe the process of creating a temporary sub directory in the shared temporary directory and race to complete the creation of the temporary subdirectory. If the attacker wins the race then they will have read and write permission to the subdirectory used to unpack web applications, including their WEB-INF/lib jar files and JSP files. If any code is ever executed out of this temporary directory, this can lead to a local privilege escalation vulnerability.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Jetty: 1.0 - 9.4.32.v20200930

---

External links
http://bugs.eclipse.org/bugs/show_bug.cgi?id=567921
http://github.com/eclipse/jetty.project/security/advisories/GHSA-g3wg-6mcf-8jj6#advisory-comment-63053
http://lists.apache.org/thread.html/r07525dc424ed69b3919618599e762f9ac03791490ca9d724f2241442@%3Cdev.felix.apache.org%3E
http://lists.apache.org/thread.html/r09b345099b4f88d2bed7f195a96145849243fb4e53661aa3bcf4c176@%3Cissues.zookeeper.apache.org%3E
http://lists.apache.org/thread.html/r0df8fe10fc36028cf6d0381ab66510917d0d68bc5ef7042001d03830@%3Cdev.zookeeper.apache.org%3E
http://lists.apache.org/thread.html/r0e9efe032cc65433251ee6470c66c334d4e7db9101e24cf91a3961f2@%3Ccommits.directory.apache.org%3E
http://lists.apache.org/thread.html/r0f5e9b93133ef3aaf31484bc3e15cc4b85f8af0fe4de2dacd9379d72@%3Cdev.felix.apache.org%3E
http://lists.apache.org/thread.html/r100c5c7586a23a19fdb54d8a32e17cd0944bdaa46277b35c397056f6@%3Cnotifications.zookeeper.apache.org%3E
http://lists.apache.org/thread.html/r18b6f10d9939419bae9c225d5058c97533cb376c9d6d0a0733ddd48d@%3Cnotifications.zookeeper.apache.org%3E
http://lists.apache.org/thread.html/r1d45051310b11c6d6476f20d71b08ea97cb76846cbf61d196bac1c3f@%3Cdev.zookeeper.apache.org%3E
http://lists.apache.org/thread.html/r1dbb87c9255ecefadd8de514fa1d35c1d493c0527d7672cf40505d04@%3Ccommits.zookeeper.apache.org%3E
http://lists.apache.org/thread.html/r1ed79516bd6d248ea9f0e704dbfd7de740d5a75b71c7be8699fec824@%3Cnotifications.zookeeper.apache.org%3E
http://lists.apache.org/thread.html/r2d17b2a4803096ba427f3575599ea29b55f5cf9dbc1f12ba044cae1a@%3Cnotifications.zookeeper.apache.org%3E
http://lists.apache.org/thread.html/r3a763de620be72b6d74f46ec4bf39c9f35f8a0b39993212c0ac778ec@%3Ccommits.zookeeper.apache.org%3E
http://lists.apache.org/thread.html/r3e05ab0922876e74fea975d70af82b98580f4c14ba643c4f8a9e3a94@%3Cissues.beam.apache.org%3E
http://lists.apache.org/thread.html/r4f29fb24639ebc5d15fc477656ebc2b3aa00fcfbe197000009c26b40@%3Cissues.zookeeper.apache.org%3E
http://lists.apache.org/thread.html/r5494fdaf4a0a42a15c49841ba7ae577d466d09239ee1050458da0f29@%3Cjira.kafka.apache.org%3E
http://lists.apache.org/thread.html/r568d354961fa88f206dc345411fb11d245c6dc1a8da3e80187fc6706@%3Cdev.zookeeper.apache.org%3E
http://lists.apache.org/thread.html/r59e0878013d329dcc481eeafebdb0ee445b1e2852d0c4827b1ddaff2@%3Cissues.beam.apache.org%3E
http://lists.apache.org/thread.html/r66e99d973fd79ddbcb3fbdb24f4767fe9b911f5b0abb05d7b6f65801@%3Ccommits.zookeeper.apache.org%3E
http://lists.apache.org/thread.html/r769411eb43dd9ef77665700deb7fc491fc3ceb532914260c90b56f2f@%3Cissues.beam.apache.org%3E
http://lists.apache.org/thread.html/r7da5ae60d7973e8894cfe92f49ecb5b47417eefab4c77cc87514d3cf@%3Cdev.felix.apache.org%3E
http://lists.apache.org/thread.html/r874688141495df766e62be095f1dfb0bf4a24ca0340d8e0215c03fab@%3Cissues.zookeeper.apache.org%3E
http://lists.apache.org/thread.html/r93d5e81e879120d8d87925dbdd4045cb3afa9b066f4370f60b626ce3@%3Ccommits.druid.apache.org%3E
http://lists.apache.org/thread.html/ra1f19625cc67ac1b459c558f2ea5647d71ce51c6fe4f4cb03baec849@%3Cnotifications.zookeeper.apache.org%3E
http://lists.apache.org/thread.html/ra55e04d5a73afcb8383f4386e2b26832c6e3972e53827021ab885943@%3Ccommits.shiro.apache.org%3E
http://lists.apache.org/thread.html/ra5b7313d8cc9411db6790adfba33f2cf0665cb77adb7b02043c95867@%3Cdev.felix.apache.org%3E
http://lists.apache.org/thread.html/rad255c736fad46135f1339408cb0147d0671e45c376c3be85ceeec1a@%3Cnotifications.zookeeper.apache.org%3E
http://lists.apache.org/thread.html/raf9c581b793c30ff8f55f2415c7bd337eb69775aae607bf9ed1b16fb@%3Cdev.zookeeper.apache.org%3E
http://lists.apache.org/thread.html/rafb023a7c61180a1027819678eb2068b0b60cd5c2559cb8490e26c81@%3Cissues.zookeeper.apache.org%3E
http://lists.apache.org/thread.html/rb8c007f87dc57731a7b9a3b05364530422535b7e0bc6a0c5b68d4d55@%3Cdev.felix.apache.org%3E
http://lists.apache.org/thread.html/rbc5a8d7a0a13bc8152d427a7e9097cdeb139c6cfe111b2f00f26d16b@%3Cissues.zookeeper.apache.org%3E
http://lists.apache.org/thread.html/rc2e24756d28580eeac811c5c6a12012c9f424b6e5bffb89f98ee3d03@%3Cdev.felix.apache.org%3E
http://lists.apache.org/thread.html/rc4b972ea10c5a65c6a88a6e233778718ab9af7f484affdd5e5de0cff@%3Ccommits.felix.apache.org%3E
http://lists.apache.org/thread.html/rd58b60ab2e49ebf21022e59e280feb25899ff785c88f31fe314aa5b9@%3Ccommits.shiro.apache.org%3E
http://lists.apache.org/thread.html/rdbf1cd0ab330c032f3a09b453cb6405dccc905ad53765323bddab957@%3Cissues.zookeeper.apache.org%3E
http://lists.apache.org/thread.html/rde11c433675143d8d27551c3d9e821fe1955f1551a518033d3716553@%3Cdev.zookeeper.apache.org%3E
http://lists.apache.org/thread.html/rde782fd8e133f7e04e50c8aaa4774df524367764eb5b85bf60d96747@%3Cnotifications.zookeeper.apache.org%3E
http://lists.apache.org/thread.html/re08b03cd1754b32f342664eead415af48092c630c8e3e0deba862a26@%3Ccommits.shiro.apache.org%3E
http://lists.apache.org/thread.html/re5706141ca397587f7ee0f500a39ccc590a41f802fc125fc135cb92f@%3Cnotifications.zookeeper.apache.org%3E
http://lists.apache.org/thread.html/rfe6ba83d14545e982400dea89e68b10113cb5202a3dcb558ce64842d@%3Cissues.zookeeper.apache.org%3E
http://security.netapp.com/advisory/ntap-20201123-0005/

---

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

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