8.2
High
CVE-2023-6779 An off-by-one heap-based buffer overflow was found in the __vsyslog_internal function of the glibc library
Description
An off-by-one 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 these functions are called with a message bigger than INT_MAX bytes, leading to an incorrect calculation of the buffer size to store the message, resulting in an application crash. This issue affects glibc 2.37 and newer.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| glibc 2.39 | earliest → < 2.39 | 2.39 |
| Red Hat Enterprise Linux 6 | Versions not published | |
| Red Hat Enterprise Linux 7 | Versions not published | |
| Red Hat Enterprise Linux 8 | Versions not published | |
| Red Hat Enterprise Linux 9 | Versions not published | |
| Fedora | Versions not published | |
| SIMATIC S7-1500 CPU 1518-4 PN/DP MFP 3.1 | 3.1.5 → latest | No fix stated |
| SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP 3.1 | 3.1.5 → latest | No fix stated |
| SIPLUS S7-1500 CPU 1518-4 PN/DP MFP 3.1 | 3.1.5 → latest | No fix stated |
Other CVEs of glibc
The 5 CVEs of glibc →
CVE-2023-6780
An integer overflow was found in the __vsyslog_internal function of the glibc library
5.3
Medium
CVE-2023-6246
A heap-based buffer overflow was found in the __vsyslog_internal function of the glibc library
8.4
High
CVE-2021-3999
A flaw was found in glibc
7.8
High
CVE-2021-3998
A flaw was found in glibc
7.5
High