High severity · published Dec 31, 2019
CVE-2019-20172
Kernel/VM/MemoryManager.cpp in SerenityOS before 2019-12-30 does not reject syscalls with pointers into the kernel-only virtual address space, which allows local users to gain…
7.8
CVSS
0.5%
EPSS
No
On KEV
Description
Kernel/VM/MemoryManager.cpp in SerenityOS before 2019-12-30 does not reject syscalls with pointers into the kernel-only virtual address space, which allows local users to gain privileges by overwriting a return address that was found on the kernel stack.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 41% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SE
Serenityos · Serenityos
before 2019-12-30 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2019-20172
CVE.org
https://www.cve.org/CVERecord?id=CVE-2019-20172
Exploit
https://github.com/Fire30/CTF-WRITEUPS/tree/master/36c3_ctf/wisdom
Patch
https://github.com/SerenityOS/serenity/commit/0fc24fe2564736689859e7edfa177a86dac36bf9
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