Staging Environment: Content and features may be unstable or change without notice.
Advisory details: gitlab / maven/io.netty/netty-handler/CVE-2021-21290
Advisory ID gitlab/maven/io.netty/netty-handler/CVE-2021-21290
Aliases CVE-2021-21290
GHSA-5mcr-gq6c-3hq2
Summary Creation of Temporary File With Insecure Permissions Netty is an open-source, asynchronous event-driven network application framework for rapid development of maintainable high performance protocol servers. There is a vulnerability on Unix-like systems involving an insecure temp file. When netty's multipart decoders are used local information disclosure can occur via the local system temporary directory if temporary storing uploads on the disk is enabled.
Status Published
Exploitability 0.5
Weighted Severity 0.0
Risk
Affected and Fixed Packages Package Details
Introduced and Fixed Package Commit Patches Package Commit Patches Details
Weaknesses (3)
CWE-378 Creation of Temporary File With Insecure Permissions
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
cvssv2 https://gitlab.com/gitlab-org/advisories-community/-/blob/main/maven/io.netty/netty-handler/CVE-2021-21290.yml
cvssv3.1 https://gitlab.com/gitlab-org/advisories-community/-/blob/main/maven/io.netty/netty-handler/CVE-2021-21290.yml
Reference id Reference type URL
https://github.com/netty/netty/commit/c735357bf29d07856ad171c6611a2e1a0e0000ec
https://github.com/netty/netty/security/advisories/GHSA-5mcr-gq6c-3hq2
CVE-2021-21290 https://nvd.nist.gov/vuln/detail/CVE-2021-21290
No exploits are available.

No EPSS data available for this advisory.

Patch URL
There are no known patches.
Vector: AV:L/AC:M/Au:N/C:P/I:N/A:N Found at https://gitlab.com/gitlab-org/advisories-community/-/blob/main/maven/io.netty/netty-handler/CVE-2021-21290.yml
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N Found at https://gitlab.com/gitlab-org/advisories-community/-/blob/main/maven/io.netty/netty-handler/CVE-2021-21290.yml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none

There are no SSVC decisions available.