Distribution advisory
This page covers CVE-2023-37457 as tracked by Alpine, for the package asterisk. The fix is available in version 20.5.1-r0; earlier versions remain affected.
How this vulnerability can be exploited
This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality none, integrity low, availability high.
CVSS metrics in full
The score comes from this vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
- Attack vector: Network — reachable from anywhere that can route to the service.
- Attack complexity: Low — the attack works reliably, with no preparation.
- Privileges required: None — an unauthenticated stranger can try it.
- User interaction: None — nobody has to be tricked into anything.
- Scope: Unchanged — the damage stays inside the vulnerable component.
- Confidentiality impact: None.
- Integrity impact: Low — limited, and the attacker does not choose what is affected.
- Availability impact: High — total loss, or loss the attacker controls.
Weakness class
ALPINE-CVE-2023-37457 is classified as CWE-120: Classic Buffer Overflow. Input is copied into a fixed-size buffer without a length check, overwriting memory past the end of it.
Affected software
ALPINE-CVE-2023-37457 is recorded against 1 package.
- asterisk (from 19.0.0 up to 20.5.1-r0)
Timeline and source
Published on 14 December 2023 and last revised on 7 August 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.
References
security.alpinelinux.org (Advisory)
Other advisories for this package
asterisk has other advisories on record. If you are patching this one, these are worth checking on the same host:
Same weakness in other software
These advisories are the same class of weakness (CWE-120: Classic Buffer Overflow) in other software:
