Gstreamer
CVE-2023-37327
HIGH
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A06:2021 - Vulnerable and Outdated Components
ASVS 5.0
V15 - Secure Coding and Architecture Integer overflow checks
MITRE ATT&CK
1 technique across 1 tactic: Execution The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
| Impact | The CVSS 3.1 score of 8.8 (High) reflects the severity potential, with network attack vector (AV:N), low attack complexity (AC:L), no privileges required (PR:N), but user interaction needed (UI:R). The EPSS score of 5.34% places this vulnerability in the 90th percentile for exploitation probability, indicating higher-than-average real-world risk. While not currently listed in CISA KEV, the combination of remote code execution capability, widespread use of GStreamer, and the availability of detailed vulnerability information from ZDI makes this a priority for patching. The requirement for user interaction slightly reduces the risk compared to fully automated attacks, but the prevalence of multimedia processing in modern applications maintains the urgency. |
| Exploit ScenarioDerived | An attacker crafts a malicious FLAC audio file with specially formatted metadata that triggers the integer overflow when parsed by GStreamer. When a user opens this file in any application using the vulnerable GStreamer library (such as media players, video editors, or streaming applications), the overflow corrupts memory and allows the attacker to execute arbitrary code with the privileges of the running application. The attack requires the victim to open or process the malicious file, which could be delivered via email attachment, malicious website download, or embedded in multimedia content. |
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Alert meAnalysisAIv1 – Mar 17, 2026
A critical integer overflow vulnerability in GStreamer's FLAC file parsing functionality allows remote attackers to execute arbitrary code when processing malicious FLAC audio files. The vulnerability affects all versions of GStreamer prior to the patched release and requires user interaction (opening/processing a malicious file) to exploit. With an EPSS score of 5.34% (90th percentile), this vulnerability poses a significant real-world risk, though no active exploitation has been reported in KEV.
RemediationAI
Apply the security patches provided in GStreamer security advisory SA-2023-0001 at https://gstreamer.freedesktop.org/security/sa-2023-0001.html immediately. System administrators should update all GStreamer installations to the latest patched version through their distribution's package manager or by downloading directly from the GStreamer project. As a temporary mitigation until patching is complete, restrict processing of FLAC files from untrusted sources and implement input validation for multimedia content in applications using GStreamer. Fedora users should refer to the specific update notice at https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/IGQEFZ6ZB3C2XU4JQD3IAFMQIN456W2D/.
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Technical ContextAI · show details
GStreamer is a widely-used open-source multimedia framework that processes various audio and video formats across multiple platforms. The vulnerability (CWE-190: Integer Overflow or Wraparound) occurs during FLAC audio file parsing when the library fails to properly validate user-supplied data, leading to an integer overflow before buffer allocation. Based on the CPE data (cpe:2.3:a:gstreamer:gstreamer:*:*:*:*:*:*:*:*), all versions of GStreamer are affected until patched. This type of vulnerability is particularly dangerous in multimedia libraries as they are commonly used in applications that process untrusted content from the internet or external sources.
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- Exploit and PoC references, threat intelligence from 22 sources
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Severity by source
AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
Lifecycle Timeline
2DescriptionCVE.org
GStreamer FLAC File Parsing Integer Overflow Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of GStreamer. Interaction with this library is required to exploit this vulnerability but attack vectors may vary depending on the implementation.
The specific flaw exists within the parsing of FLAC audio files. The issue results from the lack of proper validation of user-supplied data, which can result in an integer overflow before allocating a buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-20775.
Executive ViewAI
CVE-2023-37327 presents significant security risk, a integer overflow vulnerability rated CVSS 8.8. Exploitation could allow attackers to corrupt memory, crash the application, or potentially execute arbitrary code. A patch is available and should be applied as part of regular vulnerability management.
Apply vendor patch. If immediate patching is not feasible: (1) Implement network-level access controls to limit exposure; (2) Enable enhanced monitoring and alerting; (3) Apply principle of least privilege.
Threat Intelligence Overview
NVD
CVE.org
EPSS
VulDB
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Remote Code Execution represents the critical moment when an attacker successfully runs arbitrary code on a target system without physical access.
Affected Products (CPE)CVE.org
Heap-based buffer overflow in the flx_decode_delta_fli function in gst/flx/gstflxdec.c in the FLIC decoder in GStreamer
Heap-based buffer overflow in the flx_decode_delta_fli function in gst/flx/gstflxdec.c in the FLIC decoder in GStreamer
Heap-based buffer overflow in the flx_decode_delta_fli function in gst/flx/gstflxdec.c in the FLIC decoder in GStreamer
The FLIC decoder in GStreamer before 1.10.2 allows remote attackers to cause a denial of service (out-of-bounds write an
A heap-based buffer overflow vulnerability exists in GStreamer's RTSP connection parser that allows remote attackers to
A heap buffer over-read vulnerability exists in GStreamer's isomp4 plugin that allows reading past allocated memory boun
An integer overflow vulnerability in the GStreamer multimedia framework's matroska demuxer allows heap memory corruption
A critical integer overflow vulnerability in GStreamer's qtdemux element allows attackers to trigger denial of service o
A critical integer overflow vulnerability in the GStreamer multimedia framework's Matroska (MKV) demuxer can cause denia
An integer overflow vulnerability in GStreamer's Matroska demuxer can cause denial of service or potentially heap memory
An integer overflow vulnerability in GStreamer's AVI demux element allows attackers to trigger a heap overwrite when par
A heap overflow vulnerability exists in GStreamer's matroskaparse element due to an integer overflow in the gst_matroska
GitHub PoC
Exploit-DB