CVE-2025-1131: A local privilege escalation vulnerability exists in the safe_asterisk script included with the Asterisk toolk

Routine

HIGH 7.8UPGRADEDOWNGRADE

CVE-2025-1131 is a high-severity flaw (CVSS 7.8) affecting asterisk, certified asterisk. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A local privilege escalation vulnerability exists in the safe_asterisk script included with the Asterisk toolkit package. When Asterisk is started via this script (common in SysV init or FreePBX environments), it sources all .sh files located in /etc/asterisk/startup.d/ as root, without validating ownership or permissions. Non-root users with legitimate write access to /etc/asterisk can exploit this behaviour by placing malicious scripts in the

Why this priority

High severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	7.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.2% (top 88%)
CISA exploited list	No
Weakness	CWE-427
Published	2025-09-23
Last modified	2026-10-19

Publisher (CNA): Gridware · Vendor: sangoma

Last updated 2026-10-19 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-09-23 05:15 UTCPublished CVE record published
2026-10-19 16:10 UTCUpdated Record last modified

sangoma asterisk UPGRADE

Affected: < 18.26.3 · >= 20.0.0 and < 20.15.1 · >= 21.0.0 and < 21.10.1 · >= 22.0.0 and < 22.5.1

Fixed in: 18.26.3, 20.15.1, 21.10.1, 22.5.1

Safe to downgrade to: a release before 20.0.0

1. Check installed version

apt-cache policy asterisk || rpm -q asterisk || asterisk --version

2. UPGRADE to 18.26.3 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade asterisk

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade asterisk

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 20.0.0 (Debian / Ubuntu)

apt-cache madison asterisk sudo apt install asterisk=<VERSION_BEFORE_20.0.0> sudo apt-mark hold asterisk

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list asterisk sudo dnf downgrade asterisk-<VERSION_BEFORE_20.0.0> sudo dnf versionlock add asterisk

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

sangoma certified asterisk DOWNGRADE

Affected: 18.9 cert1 · 18.9 cert1-rc1 · 18.9 cert10 · 18.9 cert11 · 18.9 cert12 · 18.9 cert13 · 18.9 cert14 · 18.9 cert15

Fixed in: no fixed release known

Safe to downgrade to: a release before 18.9

1. Check installed version

apt-cache policy certified-asterisk || rpm -q certified-asterisk || certified-asterisk --version

2. No fixed release: DOWNGRADE to a release before 18.9 (Debian / Ubuntu)

apt-cache madison certified-asterisk sudo apt install certified-asterisk=<VERSION_BEFORE_18.9> sudo apt-mark hold certified-asterisk

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list certified-asterisk sudo dnf downgrade certified-asterisk-<VERSION_BEFORE_18.9> sudo dnf versionlock add certified-asterisk

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-1131?

asterisk: upgrade to 18.26.3, 20.15.1, 21.10.1, 22.5.1; certified asterisk: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2025-1131 being exploited?

CVE-2025-1131 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-1131 affect?

CVE-2025-1131 affects asterisk, certified asterisk. Severity is high (CVSS 7.8). A local privilege escalation vulnerability exists in the safe_asterisk script included with the Asterisk toolkit package. When Asterisk is started via this script (common in SysV init or FreePBX environments), it sources all .sh files locat

How urgent is CVE-2025-1131?

Priority 35/100. High severity; Public exploit reference

Related CVEs

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CVE-2026-23739 LOW 2.0 UPGRADE UPGRADE Asterisk is an open source private branch exchange and telephony toolkit
CVE-2026-23738 LOW 3.5 UPGRADE UPGRADE Asterisk is an open source private branch exchange and telephony toolkit
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References

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