Asterisk xml.c uses unsafe XML_PARSE_NOENT leading to potential XXE Injection
概要
Asterisk xml.c uses unsafe XML_PARSE_NOENT leading to potential XXE Injection
原文の説明
取得元が公開している説明をそのまま載せています (多くは英語)。
Asterisk is an open source private branch exchange and telephony toolkit. Prior to versions 20.7-cert9, 20.18.2, 21.12.1, 22.8.2, and 23.2.2, the ast_xml_open() function in xml.c parses XML documents using libxml with unsafe parsing options that enable entity expansion and XInclude processing. Specifically, it invokes xmlReadFile() with the XML_PARSE_NOENT flag and later processes XIncludes via xmlXIncludeProcess().If any untrusted or user-supplied XML file is passed to this function, it can allow an attacker to trigger XML External Entity (XXE) or XInclude-based local file disclosure, potentially exposing sensitive files from the host system. This can also be triggered in other cases in which the user is able to supply input in xml format that triggers the asterisk process to parse it. This issue has been patched in versions 20.7-cert9, 20.18.2, 21.12.1, 22.8.2, and 23.2.2.
出典: OSV.dev (Open Source Vulnerabilities) NVD GitHub Advisory OSV
ディストリビューション別の修正状況
各ディストリビューションが公開している、この CVE の修正パッケージ
- Debian DEBIAN-CVE-2026-23739 asterisk 修正版: 1:16.28.0~dfsg-0+deb11u9
- Ubuntu UBUNTU-CVE-2026-23739 asterisk
参照URL
- advisory github.com
- advisory github.com
- advisory nvd.nist.gov