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Vulnerability Details : CVE-2022-24903

Rsyslog is a rocket-fast system for log processing. Modules for TCP syslog reception have a potential heap buffer overflow when octet-counted framing is used. This can result in a segfault or some other malfunction. As of our understanding, this vulnerability can not be used for remote code execution. But there may still be a slight chance for experts to do that. The bug occurs when the octet count is read. While there is a check for the maximum number of octets, digits are written to a heap buffer even when the octet count is over the maximum, This can be used to overrun the memory buffer. However, once the sequence of digits stop, no additional characters can be added to the buffer. In our opinion, this makes remote exploits impossible or at least highly complex. Octet-counted framing is one of two potential framing modes. It is relatively uncommon, but enabled by default on receivers. Modules `imtcp`, `imptcp`, `imgssapi`, and `imhttp` are used for regular syslog message reception. It is best practice not to directly expose them to the public. When this practice is followed, the risk is considerably lower. Module `imdiag` is a diagnostics module primarily intended for testbench runs. We do not expect it to be present on any production installation. Octet-counted framing is not very common. Usually, it needs to be specifically enabled at senders. If users do not need it, they can turn it off for the most important modules. This will mitigate the vulnerability.
Publish Date : 2022-05-06 Last Update Date : 2023-01-20
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- CVSS Scores & Vulnerability Types

CVSS Score
6.8
Confidentiality Impact Partial (There is considerable informational disclosure.)
Integrity Impact Partial (Modification of some system files or information is possible, but the attacker does not have control over what can be modified, or the scope of what the attacker can affect is limited.)
Availability Impact Partial (There is reduced performance or interruptions in resource availability.)
Access Complexity Medium (The access conditions are somewhat specialized. Some preconditions must be satistified to exploit)
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s) Execute CodeOverflow
CWE ID 120

- Related OVAL Definitions

Title Definition Id Class Family
RHSA-2022:4795: rsyslog security update (Important) oval:com.redhat.rhsa:def:20224795 unix
RHSA-2022:4799: rsyslog security update (Important) oval:com.redhat.rhsa:def:20224799 unix
RHSA-2022:4803: rsyslog security update (Important) oval:com.redhat.rhsa:def:20224803 unix
RHSA-2022:4808: rsyslog and rsyslog7 security update (Important) oval:com.redhat.rhsa:def:20224808 unix
OVAL (Open Vulnerability and Assessment Language) definitions define exactly what should be done to verify a vulnerability or a missing patch. Check out the OVAL definitions if you want to learn what you should do to verify a vulnerability.

- Products Affected By CVE-2022-24903

# Product Type Vendor Product Version Update Edition Language
1 OS Debian Debian Linux 9.0 * * * Version Details Vulnerabilities
2 OS Debian Debian Linux 10.0 * * * Version Details Vulnerabilities
3 OS Debian Debian Linux 11.0 * * * Version Details Vulnerabilities
4 OS Fedoraproject Fedora 35 * * * Version Details Vulnerabilities
5 Application Netapp Active Iq Unified Manager - * * * Version Details Vulnerabilities
6 Application Rsyslog Rsyslog * * * * Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Debian Debian Linux 3
Fedoraproject Fedora 1
Netapp Active Iq Unified Manager 1
Rsyslog Rsyslog 1

- References For CVE-2022-24903

https://lists.fedoraproject.org/archives/list/[email protected]/message/GMNNXLCU2UORRVSZO24HL4KMVPK5PHVW/
FEDORA FEDORA-2022-f796a28a7b
https://lists.debian.org/debian-lts-announce/2022/05/msg00028.html
MLIST [debian-lts-announce] 20220520 [SECURITY] [DLA 3016-1] rsyslog security update
https://github.com/rsyslog/rsyslog/security/advisories/GHSA-ggw7-xr6h-mmr8 CONFIRM
https://www.debian.org/security/2022/dsa-5150
DEBIAN DSA-5150
https://security.netapp.com/advisory/ntap-20221111-0002/ CONFIRM
https://github.com/rsyslog/rsyslog/commit/f211042ecbb472f9d8beb4678a65d272b6f07705

- Metasploit Modules Related To CVE-2022-24903

There are not any metasploit modules related to this CVE entry (Please visit www.metasploit.com for more information)


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