CVE-2021-26713 — Out-of-bounds Write in Asterisk

CWE-787 — Out-of-bounds Write4 documents4 sources
Severity
6.5MEDIUMNVD
EPSS
0.2%
top 56.30%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
3
Digium AsteriskDigium Certified AsteriskDebian Asterisk
Timeline
PublishedFeb 19
Latest updateMay 24

Description

A stack-based buffer overflow in res_rtp_asterisk.c in Sangoma Asterisk before 16.16.1, 17.x before 17.9.2, and 18.x before 18.2.1 and Certified Asterisk before 16.8-cert6 allows an authenticated WebRTC client to cause an Asterisk crash by sending multiple hold/unhold requests in quick succession. This is caused by a signedness comparison mismatch.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HExploitability: 2.8 | Impact: 3.6

Affected Packages4 packages

▶NVDdigium/asterisk16.0.0 — 16.16.1+2
▶Alpinedigium/asterisk< 16.16.1-r0+11

🔴Vulnerability Details

2
GHSA
GHSA-24f6-gm96-3c56: A stack-based buffer overflow in res_rtp_asterisk↗2022-05-24
▶
OSV
CVE-2021-26713: A stack-based buffer overflow in res_rtp_asterisk↗2021-02-19
▶

📋Vendor Advisories

1
Debian
CVE-2021-26713: asterisk - A stack-based buffer overflow in res_rtp_asterisk.c in Sangoma Asterisk before 1...↗2021
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CVE-2021-26713 — Out-of-bounds Write in Digium Asterisk | cvebase