PT-2021-4117 · Antisip · Exosip2

Published 2021-05-10 · Updated 2021-05-19 · CVE-2021-32611

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions Antisip eXosip2 versions 1.0 through 5.2.0

Description A NULL pointer dereference issue exists when handling certain 3xx redirect responses, potentially allowing a remote attacker to cause a denial of service. The vulnerability is related to errors in processing specific redirect responses.

Recommendations For versions 1.0 through 5.2.0, consider updating to a version that fixes the NULL pointer dereference issue in eXcall api.c to prevent potential denial of service attacks. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

NULL Pointer Dereference

Weakness Enumeration

CWE-476

Related Identifiers

BDU:2021-04707

CVE-2021-32611

Affected Products

Exosip2

References · 10

• https://bdu.fstec.ru/vul/2021-04707 · Security Note
• https://cve.org/CVERecord?id=CVE-2021-32611 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2021-32611 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-32611 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-32611 · Security Note
• http://git.savannah.nongnu.org/cgit/exosip.git/commit/?id=f2ed389fe84613512cc560127883e51e6cf8c054 · Patch
• https://ubuntu.com/security/CVE-2021-32611 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2021-32611 · Vendor Advisory
• https://t.me/cvenotify/14699 · Telegram Post
• https://t.me/cvenotify/14298 · Telegram Post