==========================================================================
Ubuntu Security Notice USN-6842-1
June 20, 2024

gdb vulnerabilities
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS

Summary:

gdb could be made to crash if it opened a specially crafted file.

Software Description:
- gdb: GNU Debugger

Details:

It was discovered that gdb incorrectly handled certain memory operations
when parsing an ELF file. An attacker could possibly use this issue
to cause a denial of service. This issue is the result of an
incomplete fix for CVE-2020-16599. This issue only affected
Ubuntu 22.04 LTS. (CVE-2022-4285)

It was discovered that gdb incorrectly handled memory leading
to a heap based buffer overflow. An attacker could use this
issue to cause a denial of service, or possibly execute
arbitrary code. This issue only affected Ubuntu 22.04 LTS.
(CVE-2023-1972)

It was discovered that gdb incorrectly handled memory leading
to a stack overflow. An attacker could possibly use this issue
to cause a denial of service. This issue only affected
Ubuntu 18.04 LTS, Ubuntu 20.04 LTS and Ubuntu 22.04 LTS.
(CVE-2023-39128)

It was discovered that gdb had a use after free vulnerability
under certain circumstances. An attacker could use this to cause
a denial of service or possibly execute arbitrary code. This issue
only affected Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, Ubuntu 20.04 LTS
and Ubuntu 22.04 LTS. (CVE-2023-39129)

It was discovered that gdb incorrectly handled memory leading to a
heap based buffer overflow. An attacker could use this issue to cause
a denial of service, or possibly execute arbitrary code. This issue
only affected Ubuntu 18.04 LTS, Ubuntu 20.04 LTS and Ubuntu 22.04 LTS.
(CVE-2023-39130)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 22.04 LTS
   gdb                             12.1-0ubuntu1~22.04.2
   gdbserver                       12.1-0ubuntu1~22.04.2

Ubuntu 20.04 LTS
   gdb                             9.2-0ubuntu1~20.04.2
   gdbserver                       9.2-0ubuntu1~20.04.2

Ubuntu 18.04 LTS
   gdb                             8.1.1-0ubuntu1+esm1
                                   Available with Ubuntu Pro
   gdbserver                       8.1.1-0ubuntu1+esm1
                                   Available with Ubuntu Pro

Ubuntu 16.04 LTS
   gdb                             7.11.1-0ubuntu1~16.5+esm1
                                   Available with Ubuntu Pro
   gdbserver                       7.11.1-0ubuntu1~16.5+esm1
                                   Available with Ubuntu Pro

In general, a standard system update will make all the necessary changes.

References:
   https://ubuntu.com/security/notices/USN-6842-1
   CVE-2022-4285, CVE-2023-1972, CVE-2023-39128, CVE-2023-39129,
   CVE-2023-39130

Package Information:
   https://launchpad.net/ubuntu/+source/gdb/12.1-0ubuntu1~22.04.2
   https://launchpad.net/ubuntu/+source/gdb/9.2-0ubuntu1~20.04.2