CVE-2023-6779
Published: 31 January 2024
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.
Priority
Status
| Package | Release | Status |
|---|---|---|
|
eglibc Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| focal |
Does not exist
|
|
| jammy |
Does not exist
|
|
| mantic |
Does not exist
|
|
| noble |
Does not exist
|
|
| trusty |
Not vulnerable
|
|
| upstream |
Needs triage
|
|
| xenial |
Does not exist
|
|
|
glibc Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
|
| focal |
Not vulnerable
(2.31-0ubuntu9.14)
|
|
| jammy |
Not vulnerable
(2.35-0ubuntu3.6)
|
|
| mantic |
Released
(2.38-1ubuntu6.1)
|
|
| noble |
Released
(2.39-0ubuntu1)
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(2.37-15)
|
|
| xenial |
Not vulnerable
|
|
|
Patches: upstream: https://sourceware.org/git/?p=glibc.git;a=commit;h=7e5a0c286da33159d47d0122007aac016f3e02cd |
||
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 7.5 |
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | None |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | None |
| Integrity impact | None |
| Availability impact | High |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |