A security vulnerability labeled as CVE-2022-43241 has been discovered in Libde265 v1..8, a popular open-source library for decoding HEVC/H.265 video streams. This vulnerability is the result of an unknown crash that occurs within the ff_hevc_put_hevc_qpel_v_3_8_sse function in the sse-motion.cc file. Attackers can exploit this vulnerability to cause a Denial of Service (DoS) attack by crafting a malicious video file.

In this post, we will dive into the details of this vulnerability, discuss the potential impact on affected systems, and provide links to useful resources for further reading.

Exploit Details

The ff_hevc_put_hevc_qpel_v_3_8_sse function in Libde265 is responsible for handling HEVC/H.265 video streams. A flaw in this function allows attackers to cause a crash, enabling them to execute a DoS attack by using a specifically crafted video file. The particular code snippet that leads to the crash is found in the sse-motion.cc file.

void ff_hevc_put_hevc_qpel_v_3_8_sse(uint8_t *_dst, ptrdiff_t _dststride,
                                     const uint8_t *_src, ptrdiff_t _srcstride,
                                     int height, intptr_t mx, intptr_t my,
                                     int width) {
  // Code that may lead to the crash
}

The exact details of the exploitation are currently unknown, but this vulnerability poses a significant risk to affected systems as it can lead to a DoS attack.

Impact

The exploitation of CVE-2022-43241 can result in a Denial of Service attack. It may lead to disruption of normal operations and system crash, possibly making affected systems temporarily or permanently unavailable. This can result in significant downtime for critical systems and loss of productivity.

For more information regarding CVE-2022-43241, refer to the following resources

1. Libde265 GitHub Repository: https://github.com/strukturag/libde265
2. CVE Details Page: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-43241

Mitigation

Although there are currently no patches available to address this vulnerability, affected users should monitor the libde265 GitHub repository for updates and apply any patches or fixes as soon as they become available. In the meantime, users should exercise caution when handling video files, especially if they originate from untrusted sources.

Conclusion

CVE-2022-43241, a vulnerability in the Libde265 v1..8 library, is a significant security concern due to its potential to cause a Denial of Service attack. By exploiting this flaw, an attacker can craft a malicious video file and cause affected systems to crash, potentially leading to significant downtime and loss of productivity. Users should be mindful of this vulnerability, apply any updates or fixes as soon as they become available, and exercise caution when handling video files from untrusted sources.

Timeline

Published on: 11/02/2022 14:15:00 UTC
Last modified on: 02/27/2023 15:24:00 UTC