CVE-2019-11046— Buffer underflow in bc_shift_addsub
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I. Basic Information for CVE-2019-11046
Vulnerability Information
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Vulnerability Title
Buffer underflow in bc_shift_addsub
Source: NVD (National Vulnerability Database)
Vulnerability Description
In PHP versions 7.2.x below 7.2.26, 7.3.x below 7.3.13 and 7.4.0, PHP bcmath extension functions on some systems, including Windows, can be tricked into reading beyond the allocated space by supplying it with string containing characters that are identified as numeric by the OS but aren't ASCII numbers. This can read to disclosure of the content of some memory locations.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
跨界内存读
Source: NVD (National Vulnerability Database)
Vulnerability Title
PHP 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
PHP（PHP：Hypertext Preprocessor，PHP：超文本预处理器）是PHPGroup和开放源代码社区的共同维护的一种开源的通用计算机脚本语言。该语言主要用于Web开发，支持多种数据库及操作系统。 PHP 7.2.26之前的7.2.x版本、7.3.13之前的7.3.x版本和7.4.0版本中的bcmath扩展功能存在缓冲区错误漏洞。攻击者可借助特制字符串利用该漏洞获取某些内存位置的内容。
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-2019-11046
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- https://bugs.php.net/bug.php?id=78878x_refsource_MISC
- https://security.netapp.com/advisory/ntap-20200103-0002/x_refsource_CONFIRM
- https://www.tenable.com/security/tns-2021-14x_refsource_CONFIRM
- http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00036.htmlvendor-advisoryx_refsource_SUSE
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/N7GCOAE6KVHYJ3UQ4KLPLTGSLX6IRVRN/vendor-advisoryx_refsource_FEDORA
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XWRQPYXVG43Q7DXMXH6UVWMKWGUW552F/vendor-advisoryx_refsource_FEDORA
- https://nvd.nist.gov/vuln/detail/CVE-2019-11046
Same Patch Batch · PHP Group · 2019-12-23 · 6 CVEs total
| CVE-2019-11049 | 6.5 MEDIUM | mail() may release string with refcount==1 twice |
| CVE-2019-11047 | 4.8 MEDIUM | Heap-buffer-overflow READ in exif |
| CVE-2019-11050 | 4.8 MEDIUM | Use-after-free in exif parsing under memory sanitizer |
| CVE-2019-11044 | 3.7 LOW | link() silently truncates after a null byte on Windows |
| CVE-2019-11045 | 3.7 LOW | DirectoryIterator class silently truncates after a null byte |
IV. Related Vulnerabilities
Same product: PHP
Same vendor: PHP Group
Same weakness: CWE-125
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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-2019-11046
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