Is CVE-2023-38703 in the CISA KEV catalog?

No. CVE-2023-38703 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2023-38703?

CVE-2023-38703 has a CVSS v3 base score of 9.8 (CRITICAL).

What is the EPSS score for CVE-2023-38703?

CVE-2023-38703 has an EPSS score of 1.28% (67th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2023-38703?

Upgrade asterisk on debian 11 to 1:16.28.0~dfsg-0+deb11u4 or later.

CVE & CISA-KEV Catalog

CVE-2023-38703

CRITICAL

9.8

CVSS v3

NVD

Description

PJSIP is a free and open source multimedia communication library written in C with high level API in C, C++, Java, C#, and Python languages. SRTP is a higher level media transport which is stacked upon a lower level media transport such as UDP and ICE. Currently a higher level transport is not synchronized with its lower level transport that may introduce use-after-free issue. This vulnerability affects applications that have SRTP capability (`PJMEDIA_HAS_SRTP` is set) and use underlying media transport other than UDP. This vulnerability’s impact may range from unexpected application termination to control flow hijack/memory corruption. The patch is available as a commit in the master branch.

CWE-416Use After Free

How to fix

Remediation Available

asteriskDebian

Fixed in:1:16.28.0~dfsg-0+deb11u4CVE-2023-38703

Fixed in:1:20.8.1~dfsg+~cs6.14.40431414-1CVE-2023-38703

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploit Intelligence

1.28%probability of exploitation in 30 days

67thpercentile

Moderate risk: more likely to be exploited than 67% of all known CVEs.

References

Patch2

Mailing List1

lists.debian.org

Related Vulnerabilities

Other CWE-416 (Use After Free) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2019-0708	Critical	9.8	100%	KEV + Ransom	-
CVE-2021-31166	Critical	9.8	100%	KEV	Fix
CVE-2015-5119	Critical	9.8	99%	KEV	-
CVE-2010-3962	High	8.1	97%	KEV	-
CVE-2015-0313	Critical	9.8	96%	KEV	Fix
CVE-2017-9798	High	7.5	95%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-04-10.