Medium severity · published Apr 2, 2021
CVE-2021-1799
A port redirection issue was addressed with additional port validation
6.5
CVSS
1.8%
EPSS
No
On KEV
Description
A port redirection issue was addressed with additional port validation. This issue is fixed in macOS Big Sur 11.2, Security Update 2021-001 Catalina, Security Update 2021-001 Mojave, tvOS 14.4, watchOS 7.3, iOS 14.4 and iPadOS 14.4, Safari 14.0.3. A malicious website may be able to access restricted ports on arbitrary servers.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
None
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.8% · higher than 78% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
IO
iOS · Apple
before 14.4 · source: NVD
MA
macOS · Apple
11.0.1 before 11.2 · source: NVD
FE
Fedora · Fedoraproject
32; 33 · source: NVD
IO
Ipad OS · Apple
before 14.4 · source: NVD
SA
Safari · Apple
before 14.0.3 · source: NVD
TV
Tvos · Apple
before 14.4 · source: NVD
WA
Watchos · Apple
before 7.3 · source: NVD
WE
Webkitgtk · Webkitgtk
before 2.30.6 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-1799
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-1799
lists.fedoraproject.org
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JN6ZOD62CTO54CHTMJTHVEF6R2Y532TJ/
lists.fedoraproject.org
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L3L6ZZOU5JS7E3RFYGLP7UFLXCG7TNLU/
Third Party Advisory
https://security.gentoo.org/glsa/202104-03
Vendor Advisory
https://support.apple.com/en-us/HT212146
Vendor Advisory
https://support.apple.com/en-us/HT212147
Vendor Advisory
https://support.apple.com/en-us/HT212148
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