Vulnerability Details : 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.
Vulnerability category: Overflow
Products affected by CVE-2023-6780
- cpe:2.3:a:gnu:glibc:*:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:38:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:39:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2023-6780
0.09%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 41 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2023-6780
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
9.8
|
CRITICAL | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
3.9
|
5.9
|
NIST | 2024-02-09 |
|
5.3
|
MEDIUM | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L |
3.9
|
1.4
|
NIST | 2024-02-12 |
|
5.3
|
MEDIUM | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L |
3.9
|
1.4
|
Red Hat, Inc. | 2024-01-31 |
CWE ids for CVE-2023-6780
-
The product does not correctly calculate the size to be used when allocating a buffer, which could lead to a buffer overflow.Assigned by:
- nvd@nist.gov (Secondary)
- secalert@redhat.com (Primary)
-
The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.Assigned by:
- nvd@nist.gov (Secondary)
- secalert@redhat.com (Primary)
References for CVE-2023-6780
-
https://www.openwall.com/lists/oss-security/2024/01/30/6
oss-security - CVE-2023-6246: Heap-based buffer overflow in the glibc's syslog()Exploit;Mailing List
-
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/D2FIH77VHY3KCRROCXOT6L27WMZXSJ2G/
[SECURITY] Fedora 39 Update: glibc-2.38-16.fc39 - package-announce - Fedora Mailing-ListsMailing List
-
https://bugzilla.redhat.com/show_bug.cgi?id=2254396
2254396 – (CVE-2023-6780) CVE-2023-6780 glibc: integer overflow in __vsyslog_internal()Issue Tracking
-
http://packetstormsecurity.com/files/176932/glibc-syslog-Heap-Based-Buffer-Overflow.html
glibc syslog() Heap-Based Buffer Overflow ≈ Packet StormExploit;Third Party Advisory;VDB Entry
-
https://security.gentoo.org/glsa/202402-01
glibc: Multiple Vulnerabilities (GLSA 202402-01) — Gentoo securityThird Party Advisory
-
https://www.qualys.com/2024/01/30/cve-2023-6246/syslog.txt
Third Party Advisory
-
http://seclists.org/fulldisclosure/2024/Feb/3
Full Disclosure: CVE-2023-6246: Heap-based buffer overflow in the glibc's syslog()Exploit;Mailing List;Third Party Advisory
-
https://access.redhat.com/security/cve/CVE-2023-6780
CVE-2023-6780- Red Hat Customer PortalThird Party Advisory
-
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MWQ6BZJ6CV5UAW4VZSKJ6TO4KIW2KWAQ/
[SECURITY] Fedora 38 Update: glibc-2.37-18.fc38 - package-announce - Fedora Mailing-ListsMailing List
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