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High severity7.5NVD Advisory· Published Dec 14, 2023· Updated Jun 17, 2026

CVE-2023-37457

CVE-2023-37457

Description

Asterisk is an open source private branch exchange and telephony toolkit. In Asterisk versions 18.20.0 and prior, 20.5.0 and prior, and 21.0.0; as well as ceritifed-asterisk 18.9-cert5 and prior, the 'update' functionality of the PJSIP_HEADER dialplan function can exceed the available buffer space for storing the new value of a header. By doing so this can overwrite memory or cause a crash. This is not externally exploitable, unless dialplan is explicitly written to update a header based on data from an outside source. If the 'update' functionality is not used the vulnerability does not occur. A patch is available at commit a1ca0268254374b515fa5992f01340f7717113fa.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

33
  • Digium/Asterisk2 versions
    cpe:2.3:a:digium:asterisk:*:*:*:*:*:*:*:*+ 1 more
    • cpe:2.3:a:digium:asterisk:*:*:*:*:*:*:*:*range: <=18.20.0
    • cpe:2.3:a:digium:asterisk:21.0.0:*:*:*:*:*:*:*
  • Freepbx/Certified Asterisk28 versions
    cpe:2.3:a:sangoma:certified_asterisk:13.13.0:*:*:*:*:*:*:*+ 27 more
    • cpe:2.3:a:sangoma:certified_asterisk:13.13.0:*:*:*:*:*:*:*
    • cpe:2.3:a:sangoma:certified_asterisk:13.13.0:cert1-rc1:*:*:*:*:*:*
    • cpe:2.3:a:sangoma:certified_asterisk:13.13.0:cert1-rc2:*:*:*:*:*:*
    • cpe:2.3:a:sangoma:certified_asterisk:13.13.0:cert1-rc3:*:*:*:*:*:*
    • cpe:2.3:a:sangoma:certified_asterisk:13.13.0:cert1-rc4:*:*:*:*:*:*
    • cpe:2.3:a:sangoma:certified_asterisk:13.13.0:cert1:*:*:*:*:*:*
    • cpe:2.3:a:sangoma:certified_asterisk:13.13.0:cert2:*:*:*:*:*:*
    • cpe:2.3:a:sangoma:certified_asterisk:13.13.0:cert3:*:*:*:*:*:*
    • cpe:2.3:a:sangoma:certified_asterisk:13.13.0:rc1:*:*:*:*:*:*
    • cpe:2.3:a:sangoma:certified_asterisk:13.13.0:rc2:*:*:*:*:*:*
    • cpe:2.3:a:sangoma:certified_asterisk:16.8.0:-:*:*:*:*:*:*
    • cpe:2.3:a:sangoma:certified_asterisk:16.8.0:cert10:*:*:*:*:*:*
    • cpe:2.3:a:sangoma:certified_asterisk:16.8.0:cert11:*:*:*:*:*:*
    • cpe:2.3:a:sangoma:certified_asterisk:16.8.0:cert12:*:*:*:*:*:*
    • cpe:2.3:a:sangoma:certified_asterisk:16.8.0:cert1:*:*:*:*:*:*
    • cpe:2.3:a:sangoma:certified_asterisk:16.8.0:cert2:*:*:*:*:*:*
    • cpe:2.3:a:sangoma:certified_asterisk:16.8.0:cert3:*:*:*:*:*:*
    • cpe:2.3:a:sangoma:certified_asterisk:16.8.0:cert4:*:*:*:*:*:*
    • cpe:2.3:a:sangoma:certified_asterisk:16.8.0:cert5:*:*:*:*:*:*
    • cpe:2.3:a:sangoma:certified_asterisk:16.8.0:cert6:*:*:*:*:*:*
    • cpe:2.3:a:sangoma:certified_asterisk:16.8.0:cert7:*:*:*:*:*:*
    • cpe:2.3:a:sangoma:certified_asterisk:16.8.0:cert8:*:*:*:*:*:*
    • cpe:2.3:a:sangoma:certified_asterisk:16.8.0:cert9:*:*:*:*:*:*
    • cpe:2.3:a:sangoma:certified_asterisk:18.9:cert1:*:*:*:*:*:*
    • cpe:2.3:a:sangoma:certified_asterisk:18.9:cert2:*:*:*:*:*:*
    • cpe:2.3:a:sangoma:certified_asterisk:18.9:cert3:*:*:*:*:*:*
    • cpe:2.3:a:sangoma:certified_asterisk:18.9:cert4:*:*:*:*:*:*
    • cpe:2.3:a:sangoma:certified_asterisk:18.9:cert5:*:*:*:*:*:*
  • Asterisk/Asteriskllm-fuzzy2 versions
    <=18.20.0, <=20.5.0, <=21.0.0+ 1 more
    • (no CPE)range: <=18.20.0, <=20.5.0, <=21.0.0
    • (no CPE)range: <= 18.20.0
  • Asterisk/Certified Asteriskllm-fuzzy
    Range: <=18.9-cert5

Patches

Vulnerability mechanics

References

3

News mentions

0

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