Buffer overflow in Cisco Expressway
CVE-2017-3790
A vulnerability in the received packet parser of Cisco Expressway Series and Cisco TelePresence Video Communication Server (VCS) software could allow an unauthenticated, remote attacker to cause a reload of the affected system, resulting in a denial of service (DoS) condition. The vulnerability is due to insufficient size validation of user-supplied data. An attacker could exploit this vulnerability by sending crafted H.224 data in Real-Time Transport Protocol (RTP) packets in an H.323 call. An exploit could allow the attacker to overflow a buffer in a cache that belongs to the received packet parser, which will result in a crash of the application, resulting in a DoS condition. All versions of Cisco Expressway Series Software and Cisco TelePresence VCS Software prior to version X8.8.2 are vulnerable. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability. Cisco Bug IDs: CSCus99263.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.6 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.035 (89.0th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 89th percentile — 89.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.035 · newest: 0.035 · change: 0.000
Affected products
- Cisco Expressway — versions x8.1.0, x8.1.1, x8.1.2
- Cisco Telepresence Video Communication Server — versions x5.2_base, x6.0_base, x6.1_base
- Cisco Expressway Series Software And Telepresence Vcs All Versions Prior To Version X8.8.2 Are Vulnerable — versions Cisco Expressway Series Software and Cisco TelePresence VCS Software All versions prior to version X8.8.2 are vulnerable
Weakness classification (CWE)
References
- tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170125… (Vendor Advisory)
- www.securityfocus.com/bid/95786 (VDB Entry, Third Party Advisory, vdb-entry)
- www.securitytracker.com/id/1037697 (vdb-entry)
Frequently asked questions
- What is CVE-2017-3790?
- CVE-2017-3790 is a high-severity vulnerability in Cisco Expressway, classified under CWE-399. CVSS score: 8.6/10. Published 2017-02-01.
- How severe is CVE-2017-3790?
- High severity. CVSS v3 base score is 8.6 out of 10.