CVE-2021-43845— Prevent out-of-bounds read in PJSIP
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I. Basic Information for CVE-2021-43845
Vulnerability Information
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Vulnerability Title
Prevent out-of-bounds read in PJSIP
Source: NVD (National Vulnerability Database)
Vulnerability Description
PJSIP is a free and open source multimedia communication library. In version 2.11.1 and prior, if incoming RTCP XR message contain block, the data field is not checked against the received packet size, potentially resulting in an out-of-bound read access. This affects all users that use PJMEDIA and RTCP XR. A malicious actor can send a RTCP XR message with an invalid packet size.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:L
Source: NVD (National Vulnerability Database)
Vulnerability Type
跨界内存读
Source: NVD (National Vulnerability Database)
Vulnerability Title
PJSIP 缓冲区错误漏洞
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 2.11.1及之前版本存在缓冲区错误漏洞，该漏洞源于如果传入RTCP XR消息包含块，则不会根据接收到的数据包大小检查数据字段，可能导致越界读取访问。
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
II. Public POCs for CVE-2021-43845
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- https://www.debian.org/security/2022/dsa-5285vendor-advisory
- https://security.gentoo.org/glsa/202210-37vendor-advisory
- https://nvd.nist.gov/vuln/detail/CVE-2021-43845
IV. Related Vulnerabilities
Same product: pjproject
- CVE-2026-42225
GnuTLS backend silently skips certificate chain verification - CVE-2026-41416
PJSIP: Asymmetric ptime integer overflow in Media Stream - CVE-2026-41415
PJSIP: SIP Multipart CID URI Length Underflow - CVE-2026-40892
PJSIP: Stack buffer overflow in pjsip_auth_create_digest2() - CVE-2026-40614
PJSIP: Heap buffer overflow in Opus codec decoding
Same vendor: pjsip
- CVE-2026-42225
GnuTLS backend silently skips certificate chain verification - CVE-2026-41416
PJSIP: Asymmetric ptime integer overflow in Media Stream - CVE-2026-41415
PJSIP: SIP Multipart CID URI Length Underflow - CVE-2026-40892
PJSIP: Stack buffer overflow in pjsip_auth_create_digest2() - CVE-2026-40614
PJSIP: Heap buffer overflow in Opus codec decoding
Same weakness: CWE-125
- CVE-2026-8177
XML::LibXML versions through 2.0210 for Perl read out-of-bou - CVE-2026-6104
Global buffer over-read in mb_convert_encoding() with attack - CVE-2026-7258
Out-of-bounds read in urldecode() on NetBSD - CVE-2026-8186
Open5GS NF client.c ogs_sbi_client_send_via_scp_or_sepp out- - CVE-2026-3508
ASUS System Control Interface 缓冲区错误漏洞
V. Comments for CVE-2021-43845
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