|CVSS Meta Temp Score|
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|Current Exploit Price (≈)|
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|CTI Interest Score|
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A vulnerability was found in Linux Kernel (Operating System) (version unknown). It has been classified as critical. Affected is the function
begin_new_exec of the component SUID/GUID. The manipulation with an unknown input leads to a permission vulnerability. CWE is classifying the issue as CWE-275. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:
A flaw was found in the way the dumpable flag setting was handled when certain SUID binaries executed its descendants. The prerequisite is a SUID binary that sets real UID equal to effective UID, and real GID equal to effective GID. The descendant will then have a dumpable value set to 1. As a result, if the descendant process crashes and core_pattern is set to a relative value, its core dump is stored in the current directory with uid:gid permissions. An unprivileged local user with eligible root SUID binary could use this flaw to place core dumps into root-owned directories, potentially resulting in escalation of privileges.
The weakness was shared 08/26/2022. The advisory is shared for download at access.redhat.com. This vulnerability is traded as CVE-2021-3864 since 10/06/2021. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 10/02/2022). The MITRE ATT&CK project declares the attack technique as T1222.
Applying a patch is able to eliminate this problem. The bugfix is ready for download at lore.kernel.org.
CVSSv3VulDB Meta Base Score: 7.9
VulDB Meta Temp Score: 7.7
VulDB Base Score: 8.8
VulDB Temp Score: 8.4
VulDB Vector: 🔒
VulDB Reliability: 🔍
NVD Base Score: 7.0
NVD Vector: 🔒
VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍
CWE: CWE-275 / CWE-266
Status: Not defined
EPSS Score: 🔒
EPSS Percentile: 🔒
Price Prediction: 🔍
Current Price Estimation: 🔒
Threat IntelligenceInterest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍
0-Day Time: 🔒
Timeline10/06/2021 CVE reserved
08/26/2022 +324 days Advisory disclosed
08/26/2022 +0 days VulDB entry created
10/02/2022 +37 days VulDB last update
CVE: CVE-2021-3864 (🔒)
EntryCreated: 08/26/2022 08:41 PM
Updated: 10/02/2022 12:17 PM
Changes: 08/26/2022 08:41 PM (41), 10/02/2022 12:17 PM (11)
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