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CVE-2007-5636

Buffer overflow in the Nortel UNIStim IP Softphone 2050 allows remote attackers to cause a denial of service (application abort) and possibly execute arbitrary code via a flood of invalid characters to the RTCP port (5678/udp) that triggers a Windows error message, aka "extraneous messaging."

Published:Oct 23, 2007

Last Modified:Apr 23, 2026

EPS:Oct 23, 2007

EPSS Score:0.25021

CVSS Score:7.5

Affected Products

Vendor

Product

Action

Vendor

Nortel

Product

Ip Softphone 2050

Nortel

Ip Softphone 2050

Exploits

http://www.csnc.ch/static/advisory/csnc/nortel_UNIStim_IP_softphone_buffer-overflow_v1.0.txt http://www.securityfocus.com/bid/26118 http://www.csnc.ch/static/advisory/csnc/nortel_UNIStim_IP_softphone_buffer-overflow_v1.0.txt http://www.securityfocus.com/bid/26118 https://www.exploit-db.com/exploits/30678

Common Weakness Enumeration

CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

Common Attack Pattern Enumeration and Classification (CAPEC)

CAPEC-10 Buffer Overflow via Environment Variables

CAPEC-100 Overflow Buffers

CAPEC-123 Buffer Manipulation

CAPEC-14 Client-side Injection-induced Buffer Overflow

CAPEC-24 Filter Failure through Buffer Overflow

CAPEC-42 MIME Conversion

CAPEC-44 Overflow Binary Resource File

CAPEC-45 Buffer Overflow via Symbolic Links

CAPEC-46 Overflow Variables and Tags

CAPEC-47 Buffer Overflow via Parameter Expansion

CAPEC-8 Buffer Overflow in an API Call

CAPEC-9 Buffer Overflow in Local Command-Line Utilities

Related CVEs

CVE-2007-5639 (CVSS 7.1) — The Nortel UNIStim IP Softphone 2050, IP Phone 1140E, and other Nortel IP Phone, Mobile Voice Client, and WLAN…

CVE-2004-1305 (CVSS 5) — The Windows Animated Cursor (ANI) capability in Windows NT, Windows 2000 through SP4, Windows XP through SP1, …

CVE-2004-1319 (CVSS 5) — The DHTML Edit Control (dhtmled.ocx) allows remote attackers to inject arbitrary web script into other domains…

CVE-2004-0839 (CVSS 5) — Internet Explorer in Windows XP SP2, and other versions including 5.01 and 5.5, allows remote attackers to ins…

References

http://osvdb.org/38521

http://secunia.com/advisories/27252

http://securityreason.com/securityalert/3271

http://support.nortel.com/go/main.jsp?cscat=BLTNDETAIL&id=655203

http://www.csnc.ch/static/advisory/csnc/nortel_UNIStim_IP_softphone_buffer-overflow_v1.0.txt

http://www.securityfocus.com/archive/1/482476/100/0/threaded

http://www.securityfocus.com/bid/26118

http://www.vupen.com/english/advisories/2007/3540

https://exchange.xforce.ibmcloud.com/vulnerabilities/37256

http://osvdb.org/38521

http://secunia.com/advisories/27252

http://securityreason.com/securityalert/3271

http://support.nortel.com/go/main.jsp?cscat=BLTNDETAIL&id=655203

http://www.csnc.ch/static/advisory/csnc/nortel_UNIStim_IP_softphone_buffer-overflow_v1.0.txt

http://www.securityfocus.com/archive/1/482476/100/0/threaded

http://www.securityfocus.com/bid/26118

http://www.vupen.com/english/advisories/2007/3540

https://exchange.xforce.ibmcloud.com/vulnerabilities/37256

Common Vulnerability Scoring System

Attack Vector

Network

Adjacent

Local

Physical

Privileges Required

None

Low

High

User Interaction

None

Required

Scope

Unchanged

Changed

Confidentiality

None

Low

High

Integrity

None

Low

High

Availability

None

Low

High