High severity · published Sep 6, 2023
CVE-2023-3777
Use-after-free in Linux kernel's netfilter: nf_tables component
7.8
CVSS
0.4%
EPSS
No
On KEV
Description
A use-after-free vulnerability in the Linux kernel's netfilter: nf_tables component can be exploited to achieve local privilege escalation.
When nf_tables_delrule() is flushing table rules, it is not checked whether the chain is bound and the chain's owner rule can also release the objects in certain circumstances.
We recommend upgrading past commit 6eaf41e87a223ae6f8e7a28d6e78384ad7e407f8.
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)0.4% · higher than 35% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
KE
Kernel · Linux
5.9 before 6.5 · source: vendor, NVD
DL
Debian Linux · Debian
12.0 · source: NVD
UL
Ubuntu Linux · Canonical
14.04; 16.04; 18.04; 20.04; 22.04 · source: NVD
SS
SIMATIC S7-1500 TM MFP - GNU/Linux subsystem · Siemens
before V1.1 · source: CISA
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-3777
CVE.org
https://www.cve.org/CVERecord?id=CVE-2023-3777
Third Party Advisory
http://packetstormsecurity.com/files/175072/Kernel-Live-Patch-Security-Notice-LSN-0098-1.html
Third Party Advisory
http://packetstormsecurity.com/files/175963/Kernel-Live-Patch-Security-Notice-LSN-0099-1.html
Issue Tracking
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=6eaf41e87a223ae6f8e7a28d6e78384ad7e407f8
Patch
https://kernel.dance/6eaf41e87a223ae6f8e7a28d6e78384ad7e407f8
Third Party Advisory
https://www.debian.org/security/2023/dsa-5492
cert-portal.siemens.com
https://cert-portal.siemens.com/productcert/html/ssa-794697.html
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