Code execution via malformed SRT closing tags
Published May 3, 2024 · Updated Nov 4, 2025
Heap overflow in GStreamer gst-plugins-base 0.10.x, before 1.20.7, and 1.22.0 through 1.22.3 allows remote attackers to execute code. In subrip_fix_up_markup, the parser searches for a closing angle bracket from the remaining buffer's start instead of the new opening tag, so nested unexpected closing tags can make memmove operate out of bounds. Exploitation requires a consuming application to parse an attacker-supplied SRT subtitle; the resulting heap corruption can crash that process or run code in its context.
Summary
What happened
Heap overflow in GStreamer gst-plugins-base 0.10.x, before 1.20.7, and 1.22.0 through 1.22.3 allows remote attackers to execute code. In subrip_fix_up_markup, the parser searches for a closing angle bracket from the remaining buffer's start instead of the new opening tag, so nested unexpected closing tags can make memmove operate out of bounds. Exploitation requires a consuming application to parse an attacker-supplied SRT subtitle; the resulting heap corruption can crash that process or run code in its context.
The record
- CVE
- CVE-2023-37329
- Published
- May 3, 2024
- Updated
- Nov 4, 2025
- Vendor
- GStreamer Project
- Product
- GStreamer
- Classifications
- CWE-122, CWE-787, T1203, T1204.002
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- May 3, 2024CVE publishedPublication date reported by the CVE source.
- Nov 4, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=1.22.2
- Affected versionversion=1.x < 1.22.4, 1.x < 1.20.7, 0.10.x
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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