// For flags

CVE-2016-2053

kernel: Kernel panic and system lockup by triggering BUG_ON() in public_key_verify_signature()

Severity Score

4.7
*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

The asn1_ber_decoder function in lib/asn1_decoder.c in the Linux kernel before 4.3 allows attackers to cause a denial of service (panic) via an ASN.1 BER file that lacks a public key, leading to mishandling by the public_key_verify_signature function in crypto/asymmetric_keys/public_key.c.

La función asn1_ber_decoder en lib/asn1_decoder.c en el kernel de Linux en versiones anteriores a 4.3 permite a atacantes provocar una denegación de servicio (pánico) a través de un archivo ASN.1 BER que carece de clave pública, llevando a un manejo incorrecto por la función public_key_verify_signature en crypto/asymmetric_keys/public_key.c.

A syntax vulnerability was discovered in the kernel's ASN1.1 DER decoder, which could lead to memory corruption or a complete local denial of service through x509 certificate DER files. A local system user could use a specially created key file to trigger BUG_ON() in the public_key_verify_signature() function (crypto/asymmetric_keys/public_key.c), to cause a kernel panic and crash the system.

*Credits: N/A
CVSS Scores
Attack Vector
Local
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Attack Vector
Local
Attack Complexity
Medium
Authentication
None
Confidentiality
None
Integrity
None
Availability
Complete
Attack Vector
Local
Attack Complexity
Low
Authentication
None
Confidentiality
None
Integrity
None
Availability
Complete
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2016-01-25 CVE Reserved
  • 2016-05-02 CVE Published
  • 2023-03-08 EPSS Updated
  • 2024-08-05 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-228: Improper Handling of Syntactically Invalid Structure
  • CWE-310: Cryptographic Issues
CAPEC
References (29)
URL Tag Source
http://www.openwall.com/lists/oss-security/2016/01/25/4 Mailing List
http://www.securitytracker.com/id/1036763 Third Party Advisory
URL Date SRC
URL Date SRC
https://github.com/torvalds/linux/commit/0d62e9dd6da45bbf0f33a8617afc5fe774c8f45f 2018-08-30
URL Date SRC
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=0d62e9dd6da45bbf0f33a8617afc5fe774c8f45f 2018-08-30
http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00044.html 2018-08-30
http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00052.html 2018-08-30
http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00054.html 2018-08-30
http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00000.html 2018-08-30
http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00003.html 2018-08-30
http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00007.html 2018-08-30
http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00008.html 2018-08-30
http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00009.html 2018-08-30
http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00014.html 2018-08-30
http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00015.html 2018-08-30
http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00016.html 2018-08-30
http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00017.html 2018-08-30
http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00018.html 2018-08-30
http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00019.html 2018-08-30
http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00020.html 2018-08-30
http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00021.html 2018-08-30
http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00022.html 2018-08-30
http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00023.html 2018-08-30
http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00026.html 2018-08-30
http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00044.html 2018-08-30
http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00055.html 2018-08-30
http://rhn.redhat.com/errata/RHSA-2016-2574.html 2018-08-30
http://rhn.redhat.com/errata/RHSA-2016-2584.html 2018-08-30
https://bugzilla.redhat.com/show_bug.cgi?id=1300237 2016-11-03
https://access.redhat.com/security/cve/CVE-2016-2053 2016-11-03
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Linux
Search vendor "Linux"
 Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
 < 4.3
Search vendor "Linux" for product "Linux Kernel" and version " < 4.3"
-
Affected