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CVE-2022-23608— Use after free in PJSIP

Quick assessment

Affected
pjsip pjproject
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

PJSIP是一个免费和开源的多媒体通信库，用C语言编写，实现基于标准的协议，如SIP, SDP, RTP, STUN, TURN，和ICE。 PJSIP 存在资源管理错误漏洞，该漏洞源于在2.11.1之前的版本中，在对话框集(或分叉)场景中，多个UAC对话框共享的哈希键可能会在其中一个对话框被销毁时提前释放。攻击者可利用该漏洞导致一个对话框集在哈希表中注册多次(使用不同的哈希键)，从而导致未定义的行为，如对话列表冲突，最终导致无尽的循环。

CVSS 8.1 · High EPSS 4.06% · P90

Possible ATT&CK Techniques 1 AI

T1499.002 · Service Exhaustion Flood
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I. Basic Information for CVE-2022-23608

Vulnerability Information
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Vulnerability Title
Use after free in PJSIP
Source: CVE Program / CVE List V5
Vulnerability Description
PJSIP is a free and open source multimedia communication library written in C language implementing standard based protocols such as SIP, SDP, RTP, STUN, TURN, and ICE. In versions up to and including 2.11.1 when in a dialog set (or forking) scenario, a hash key shared by multiple UAC dialogs can potentially be prematurely freed when one of the dialogs is destroyed . The issue may cause a dialog set to be registered in the hash table multiple times (with different hash keys) leading to undefined behavior such as dialog list collision which eventually leading to endless loop. A patch is available in commit db3235953baa56d2fb0e276ca510fefca751643f which will be included in the next release. There are no known workarounds for this issue.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
释放后使用
Source: CVE Program / CVE List V5
Vulnerability Title
PJSIP 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
PJSIP是一个免费和开源的多媒体通信库，用C语言编写，实现基于标准的协议，如SIP, SDP, RTP, STUN, TURN，和ICE。 PJSIP 存在资源管理错误漏洞，该漏洞源于在2.11.1之前的版本中，在对话框集(或分叉)场景中，多个UAC对话框共享的哈希键可能会在其中一个对话框被销毁时提前释放。攻击者可利用该漏洞导致一个对话框集在哈希表中注册多次(使用不同的哈希键)，从而导致未定义的行为，如对话列表冲突，最终导致无尽的循环。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
pjsip pjproject <= 2.11.1 -

II. Public POCs for CVE-2022-23608

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III. Intelligence Information for CVE-2022-23608

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Patches & Fixes for CVE-2022-23608 (1)

Vendor Advisories for CVE-2022-23608 (3)

Exploits & Public PoCs for CVE-2022-23608 (1)

Mailing List Discussions for CVE-2022-23608 (4)

IV. Related Vulnerabilities

Same product: pjproject
Same vendor: pjsip
Same weakness: CWE-416

V. Comments for CVE-2022-23608

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