Skip to content
Fencer Intel
none 0.0

CVE-2026-23741 json

ast_coredumper running as root sources ast_debug_tools.conf from /etc/asterisk; potentially leading to privilege escalation

published 9mo ago modified 4mo ago also EUVD-2026-5648

cvss
0.0
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 11%
public exploits
0
none known

Summary

Asterisk is an open source private branch exchange and telephony toolkit. Prior to versions 20.7-cert9, 20.18.2, 21.12.1, 22.8.2, and 23.2.2, the asterisk/contrib/scripts/ast_coredumper runs as root, as noted by the NOTES tag on line 689 of the ast_coredumper file. The script will source the contents of /etc/asterisk/ast_debug_tools.conf, which resides in a folder that is writeable by the asterisk user:group. Due to the /etc/asterisk/ast_debug_tools.conf file following bash semantics and it being loaded; an attacker with write permissions may add or modify the file such that when the root ast_coredumper is run; it would source and thereby execute arbitrary bash code found in the /etc/asterisk/ast_debug_tools.conf. This issue has been patched in versions 20.7-cert9, 20.18.2, 21.12.1, 22.8.2, and 23.2.2.

Patch / fix

  • asterisk certified_asterisk 20.7-cert9, 20.18.2, 21.12.1, 22.8.2, 23.2.2
  • asterisk open_source 20.7-cert9, 20.18.2, 21.12.1, 22.8.2, 23.2.2
  • digium asterisk 20.7-cert9, 20.18.2, 21.12.1, 22.8.2, 23.2.2
  • digium certified_asterisk 20.7-cert9, 20.18.2, 21.12.1, 22.8.2, 23.2.2
  • sangoma certified_asterisk 20.7-cert9, 20.18.2, 21.12.1, 22.8.2, 23.2.2
  • asterisk Debian 14 1:22.8.2+dfsg+~cs6.15.60671435-1

debian advisories DEBIAN-CVE-2026-23741

Is CVE-2026-23741 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

Check with Fencer

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-23741 updated cvss 8.2

asterisk: privilege escalation via the ast_coredumper script

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
9mo ago

Exploit prediction

0.21% chance of exploitation in the next 30 days, higher than 11% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.1 0.0 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:N/I:N/A:N
NVD 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

  • asterisk asterisk

Classification

Weakness
  • CWE-427 Uncontrolled Search Path Element

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.