CVE-2015-0770 in TelePresence
Summary
by MITRE
CRLF injection vulnerability in Cisco TelePresence TC 6.x before 6.3.4 and 7.x before 7.3.3 on Integrator C SX20 devices allows remote attackers to inject arbitrary HTTP headers and conduct HTTP response splitting attacks via a crafted URL, aka Bug ID CSCut79341.
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Analysis
by VulDB Data Team • 12/02/2024
The CVE-2015-0770 vulnerability represents a critical CRLF injection flaw affecting Cisco TelePresence TC 6.x systems prior to version 6.3.4 and 7.x systems before version 7.3.3, specifically impacting Integrator C SX20 devices. This vulnerability falls under the CWE-113 category, which addresses "Improper Neutralization of CRLF Sequences in HTTP Headers" and aligns with ATT&CK technique T1190 for "Exploit Public-Facing Application" and T1071.004 for "Application Layer Protocol: DNS." The flaw exists in the handling of HTTP requests where the system fails to properly sanitize input parameters, allowing malicious actors to inject carriage return line feed sequences into HTTP headers.
The technical exploitation of this vulnerability occurs when attackers craft malicious URLs containing CRLF sequences that get processed by the TelePresence device's web server. When these sequences are injected into HTTP headers, they enable attackers to manipulate the HTTP response structure, creating conditions for HTTP response splitting attacks. This allows malicious actors to inject arbitrary HTTP headers into the response, potentially redirecting users to malicious sites, stealing session cookies, or performing cross-site scripting attacks. The vulnerability specifically targets the web interface of the device, making it accessible over the network without requiring authentication for exploitation.
The operational impact of this vulnerability extends beyond simple header injection, as it creates a pathway for more sophisticated attacks within the network environment. An attacker who successfully exploits this vulnerability can manipulate the device's web responses to redirect users to phishing sites, inject malicious content into the web interface, or establish persistent access points within the network. The vulnerability affects devices that are often deployed in corporate environments where they may have direct network access, potentially allowing attackers to escalate privileges or gain further access to internal systems. The attack vector is particularly concerning as it requires no authentication and can be executed over the network, making it an attractive target for remote exploitation.
Mitigation strategies for CVE-2015-0770 should focus on immediate patching of affected devices to versions 6.3.4 or 7.3.3, respectively, as these releases contain the necessary fixes to prevent CRLF injection. Network segmentation and access controls should be implemented to limit exposure of these devices to untrusted networks, while monitoring systems should be configured to detect unusual HTTP header patterns or suspicious URL requests. Organizations should also implement web application firewalls to filter out potentially malicious CRLF sequences and conduct regular vulnerability assessments to identify similar injection flaws in other network components. The remediation process should include comprehensive testing of patched systems to ensure that the vulnerability has been fully addressed without introducing regressions in device functionality.