Glibc: integer overflow in __vsyslog_internal()
CVE-2023-6780

5.3MEDIUM

Key Information:

Vendor

Red Hat
Status
Glibc
Red Hat Enterprise Linux 6
Red Hat Enterprise Linux 7
Red Hat Enterprise Linux 8
Vendor
CVE Published:
31 January 2024

What is CVE-2023-6780?

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.

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Affected Version(s)

glibc 2.39

References

http://packetstormsecurity.com/files/176932/glibc-syslog-...
http://seclists.org/fulldisclosure/2024/Feb/3
https://access.redhat.com/security/cve/CVE-2023-6780
vdb-entryx_refsource_REDHAT

CVSS V3.1

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

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