CVE-2023-6246

Glibc: heap-based buffer overflow in __vsyslog_internal()

Severity Score

7.8

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

Attend

*SSVC

Descriptions

A heap-based buffer overflow was found in the __vsyslog_internal function of the glibc library. This function is called by the syslog and vsyslog functions. This issue occurs when the openlog function was not called, or called with the ident argument set to NULL, and the program name (the basename of argv[0]) is bigger than 1024 bytes, resulting in an application crash or local privilege escalation. This issue affects glibc 2.36 and newer.

Se encontró un desbordamiento de búfer en la región Heap de la memoria en la función __vsyslog_internal de la librería glibc. Esta función es llamada por las funciones syslog y vsyslog. Este problema ocurre cuando no se llamó a la función openlog, o se llamó con el argumento ident establecido en NULL, y el nombre del programa (el nombre base de argv[0]) tiene más de 1024 bytes, lo que provoca un bloqueo de la aplicación o una escalada de privilegios locales. Este problema afecta a glibc 2.36 y versiones posteriores.

*Credits: Red Hat would like to thank Qualys Threat Research Unit for reporting this issue.

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

* Common Vulnerability Scoring System

SSVC

Decision:Attend

Exploitation

Poc

Automatable

Tech. Impact

Total

* Organization's Worst-case Scenario

Timeline

2023-11-21 CVE Reserved
2024-01-31 CVE Published
2024-03-06 First Exploit
2024-09-29 EPSS Updated
2024-10-17 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-122: Heap-based Buffer Overflow
CWE-787: Out-of-bounds Write

CAPEC

References (13)

URL	Tag	Source
https://access.redhat.com/security/cve/CVE-2023-6246	Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2249053	Issue Tracking
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/D2FIH77VHY3KCRROCXOT6L27WMZXSJ2G	Mailing List
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MWQ6BZJ6CV5UAW4VZSKJ6TO4KIW2KWAQ	Mailing List
https://security.gentoo.org/glsa/202402-01	Third Party Advisory
https://security.netapp.com/advisory/ntap-20240216-0007

URL	Date	SRC
https://github.com/elpe-pinillo/CVE-2023-6246	2024-03-06
http://packetstormsecurity.com/files/176931/glibc-qsort-Out-Of-Bounds-Read-Write.html	2024-10-17
http://packetstormsecurity.com/files/176932/glibc-syslog-Heap-Based-Buffer-Overflow.html	2024-10-17
http://seclists.org/fulldisclosure/2024/Feb/3	2024-10-17
http://seclists.org/fulldisclosure/2024/Feb/5	2024-10-17
https://www.openwall.com/lists/oss-security/2024/01/30/6	2024-10-17
https://www.qualys.com/2024/01/30/cve-2023-6246/syslog.txt	2024-10-17

URL	Date	SRC

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Gnu Search vendor "Gnu"		Glibc Search vendor "Gnu" for product "Glibc"				>= 2.36 < 2.39 Search vendor "Gnu" for product "Glibc" and version " >= 2.36 < 2.39"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				38 Search vendor "Fedoraproject" for product "Fedora" and version "38"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				39 Search vendor "Fedoraproject" for product "Fedora" and version "39"		-		Affected