CVE-2023-6780

Glibc: integer overflow in __vsyslog_internal()

Severity Score

5.3

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

An integer 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 these functions are called with a very long message, leading to an incorrect calculation of the buffer size to store the message, resulting in undefined behavior. This issue affects glibc 2.37 and newer.

Se encontró un desbordamiento de enteros en la función __vsyslog_internal de la liibrería glibc. Esta función es llamada por las funciones syslog y vsyslog. Este problema ocurre cuando estas funciones se llaman con un mensaje muy largo, lo que genera un cálculo incorrecto del tamaño del búfer para almacenar el mensaje, lo que genera un comportamiento indefinido. Este problema afecta a glibc 2.37 y posteriores.

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

CVSS Scores

NISTv3.1 5.3

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

Low

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2023-12-13 CVE Reserved
2024-01-31 CVE Published
2024-02-13 EPSS Updated
2024-08-02 CVE Updated
2024-08-02 First Exploit
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-131: Incorrect Calculation of Buffer Size
CWE-190: Integer Overflow or Wraparound

CAPEC

References (9)

URL	Tag	Source
https://access.redhat.com/security/cve/CVE-2023-6780	Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2254396	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://www.qualys.com/2024/01/30/cve-2023-6246/syslog.txt	Third Party Advisory

URL	Date	SRC
http://packetstormsecurity.com/files/176932/glibc-syslog-Heap-Based-Buffer-Overflow.html	2024-08-02
http://seclists.org/fulldisclosure/2024/Feb/3	2024-08-02
https://www.openwall.com/lists/oss-security/2024/01/30/6	2024-08-02

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"				>= 2.37 < 2.39 Search vendor "Gnu" for product "Glibc" and version " >= 2.37 < 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