CVE-2023-27585

Published: 14 March 2023

PJSIP is a free and open source multimedia communication library written in C. A buffer overflow vulnerability in versions 2.13 and prior affects applications that use PJSIP DNS resolver. It doesn't affect PJSIP users who do not utilise PJSIP DNS resolver. This vulnerability is related to CVE-2022-24793. The difference is that this issue is in parsing the query record `parse_query()`, while the issue in CVE-2022-24793 is in `parse_rr()`. A patch is available as commit `d1c5e4d` in the `master` branch. A workaround is to disable DNS resolution in PJSIP config (by setting `nameserver_count` to zero) or use an external resolver implementation instead.

Priority

Cvss 3 Severity Score

7.5

Score breakdown

Status

Package	Release	Status
pjproject Launchpad, Ubuntu, Debian	bionic	Needs triage
	focal	Does not exist
	jammy	Does not exist
	kinetic	Does not exist
	trusty	Ignored (end of standard support)
	upstream	Needs triage
	xenial	Needs triage
ring Launchpad, Ubuntu, Debian	trusty	Ignored (end of standard support)
	xenial	Ignored (end of standard support)
	impish	Ignored (end of life)
	upstream	Needs triage
	bionic	Released (20180228.1.503da2b~ds1-1ubuntu0.1~esm1) Available with Ubuntu Pro
	focal	Released (20190215.1.f152c98~ds1-1+deb10u2build0.20.04.1)
	lunar	Released (20230206.0~ds1-5ubuntu0.1)
	mantic	Released (20230206.0~ds2-1.3ubuntu0.1)

Severity score breakdown

Parameter	Value
Base score	7.5
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	None
Integrity impact	None
Availability impact	High
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

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