Telekom Security

Dec 21, 2023 Security Advisory

Apple's macOS Quick Look Vulnerability - Buffer Overflow

A vulnerability has been identified in Apple’s Quick Look feature that affects Apple’s macOS. The vulnerability, classified as a classic buffer overflow, was addressed with improved bounds checking.

Dec 15, 2023 Security Advisory

Critical remote denial of service vulnerability in matrixssl TLSv1.3 server pre-shared-key parsing

A new critical DoS vulnerability (CVE-2023-24609) was discovered in the matrixssl library (versions 4.6.0-4.0.0, github.com/matrixssl/matrixssl) by Security Evaluators of Telekom Security with modern fuzzing methods.View the full advisory

Dec 07, 2023 Security Advisory

Wire Secure Messenger Remote Format String Vulnerability

A Format String vulnerability (CVE-2023-48221) in the Wire AVS library used in Wire Secure Messenger allows an attacker to cause a denial of service (application crash) or possibly execute arbitrary code via voice or video call. This aff...

Aug 25, 2023 Research Note

Shining some light on the DarkGate loader

Analysis and Report by Fabian Marquardt (@marqufabi)Recently, Telekom Security CTI was made aware via trust groups in which we are engaged about a new malware campaign that is distributed via phishing emails. The malspam campaign used st...

Jul 10, 2023 Security Advisory

LibreOffice Calc Formula Parsing Vulnerability

A vulnerability in LibreOffice (CVE-2023-0950) allows to trigger an array index underflow that could be exploited by an attacker to execute arbitrary code. To trigger the vulnerability, a victim only needs to open a specially crafted Spr...

Apr 24, 2023 Security Advisory

Mozilla Maintenance Service Write-lock bypass Vulnerability

A vulnerability in the Mozilla Maintenance Service (CVE-2023-29532) allows a local attacker to trick the Mozilla Maintenance Service into applying an unsigned update file by pointing the service to an update file on a malicious SMB serve...

Apr 03, 2023 Write-up

USD: One File Format, Many Vulnerabilities

This post covers my project of identifying a series of vulnerabilities (CVE-2020-9878, CVE-2020-9880, CVE-2020-9881, CVE-2020-9882, CVE-2020-9940, CVE-2020-9985) in the processing of USD (Universal Scene Description) files within Apple’s...

Jan 09, 2023 Security Advisory

Critical remote buffer overflow vulnerability in matrixssl TLSv1.3 server message processing

A new critical remote buffer overflow vulnerability (CVE-2022-43974) was discovered in the matrixssl library (versions 4.5.1- 4.0.0, https://github.com/matrixssl/matrixssl) by Security Evaluators of Telekom Security with modern fuzzing m...

Telekom Security Updates