CVE-2026-57879 Overview
CVE-2026-57879 is an unauthenticated stack-based buffer overflow in the ssvr component of GeoVision GV-LPC2011 and GV-LPC2211 license plate capture devices running firmware V1.12 and earlier. The flaw resides in the Real Time Streaming Protocol (RTSP) custom authentication handler, which fails to enforce bounds when copying attacker-supplied data into a fixed-size stack buffer. A remote attacker can send a crafted RTSP request to trigger memory corruption. Successful exploitation can cause denial of service or arbitrary code execution on the affected device. The vulnerability is tracked under CWE-121: Stack-based Buffer Overflow and requires no authentication or user interaction.
Critical Impact
Remote, unauthenticated attackers can corrupt memory over the network and potentially execute arbitrary code on GeoVision GV-LPC2011 and GV-LPC2211 devices running firmware V1.12 or earlier.
Affected Products
- GeoVision GV-LPC2011 (firmware V1.12 and earlier)
- GeoVision GV-LPC2211 (firmware V1.12 and earlier)
- RTSP ssvr service on affected GeoVision license plate capture devices
Discovery Timeline
- 2026-06-26 - CVE-2026-57879 published to the National Vulnerability Database (NVD)
- 2026-06-26 - Last updated in NVD database
Technical Details for CVE-2026-57879
Vulnerability Analysis
The vulnerability exists in the ssvr service, which handles RTSP streaming on GeoVision GV-LPC2011 and GV-LPC2211 devices. When the service parses custom authentication data supplied in an RTSP request, it copies the incoming data into a fixed-size stack buffer without validating the input length. This condition maps directly to CWE-121: Stack-based Buffer Overflow.
Because the attack surface is exposed over the network and requires no credentials, an attacker can reach the vulnerable code path by connecting to the RTSP port and sending a single malformed authentication header. Overwriting stack memory allows attackers to corrupt saved return addresses or adjacent control data. On embedded devices where mitigations such as stack canaries, Address Space Layout Randomization (ASLR), or non-executable memory are often incomplete, this class of flaw frequently leads to reliable code execution.
Root Cause
The root cause is insufficient bounds checking during the parsing of custom RTSP authentication fields inside ssvr. The service trusts the length of caller-supplied authentication data and writes it into a stack-allocated buffer, allowing a longer payload to overrun adjacent stack frames.
Attack Vector
Exploitation occurs over the network against the device's RTSP listener. The attacker crafts an RTSP request containing an oversized custom authentication payload and sends it to a reachable GV-LPC2011 or GV-LPC2211 device. No authentication, user interaction, or prior access to the device is required, making internet-exposed cameras particularly at risk.
No public proof-of-concept exploit or verified code sample is available at this time. Refer to the GeoVision Cyber Security Resource for vendor guidance.
Detection Methods for CVE-2026-57879
Indicators of Compromise
- Unexpected ssvr process crashes, restarts, or watchdog reboots on GV-LPC2011 or GV-LPC2211 devices.
- Anomalous RTSP requests containing oversized or malformed authentication headers directed at camera management interfaces.
- Outbound connections from license plate capture devices to unfamiliar hosts following inbound RTSP traffic.
Detection Strategies
- Inspect RTSP traffic (typically TCP/554) for authentication headers that exceed expected length limits or contain non-printable byte sequences.
- Correlate device availability alerts and reboot events with recent inbound RTSP sessions from external sources.
- Baseline normal RTSP client behavior for camera fleets and alert on sudden spikes in authentication failures or malformed session initiations.
Monitoring Recommendations
- Log and retain RTSP session metadata at network chokepoints in front of camera VLANs for retrospective hunting.
- Monitor GeoVision device syslog output for ssvr faults, segmentation violations, or unexpected service restarts.
- Alert on any RTSP traffic reaching camera devices from outside the management network or the public internet.
How to Mitigate CVE-2026-57879
Immediate Actions Required
- Identify all GeoVision GV-LPC2011 and GV-LPC2211 devices in the environment and confirm their firmware versions.
- Remove direct internet exposure of RTSP (TCP/554) on affected devices and restrict access to trusted management subnets.
- Apply firmware updates from GeoVision as soon as they are published for firmware V1.12 and earlier.
Patch Information
GeoVision publishes firmware updates and advisories through the GeoVision Cyber Security Resource. Administrators should consult that portal for fixed firmware versions superseding V1.12 and validate deployment across the fleet.
Workarounds
- Place affected cameras behind a firewall or VPN and block inbound RTSP from untrusted networks until patched firmware is applied.
- Disable the RTSP service or custom authentication feature on affected devices where operationally feasible.
- Segment license plate capture devices onto a dedicated VLAN with strict egress filtering to limit post-exploitation impact.
# Example: restrict RTSP access to a trusted management subnet using iptables on an upstream gateway
iptables -A FORWARD -p tcp --dport 554 -s 10.10.20.0/24 -d 10.20.30.0/24 -j ACCEPT
iptables -A FORWARD -p tcp --dport 554 -d 10.20.30.0/24 -j DROP
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
