Vulnerability-Lookup

CNVD-2016-00461

Vulnerability from cnvd - Published: 2016-01-26

Title

GNU C Library安全机制绕过漏洞

Description

glibc是GNU发布的libc库，即c运行库。 GNU C Library的elf/rtld.c内的函数process_envvars存在安全漏洞，本地攻击者通过LD_POINTER_GUARD环境变量内的零值，可绕过指针防护保护机制。

Severity

低

Patch Name

GNU C Library安全机制绕过漏洞的补丁

Patch Description

glibc是GNU发布的libc库，即c运行库。 GNU C Library的elf/rtld.c内的函数process_envvars存在安全漏洞，本地攻击者通过LD_POINTER_GUARD环境变量内的零值，可绕过指针防护保护机制。目前，供应商发布了安全公告及相关补丁信息，修复了此漏洞。

Formal description

用户可参考如下厂商提供的安全公告获取补丁以修复该漏洞： http://hmarco.org/bugs/glibc_ptr_mangle_weakness.html

Reference

http://hmarco.org/bugs/glibc_ptr_mangle_weakness.html

Impacted products

Name
GNU glibc <2.23

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2015-8777"
    }
  },
  "description": "glibc\u662fGNU\u53d1\u5e03\u7684libc\u5e93\uff0c\u5373c\u8fd0\u884c\u5e93\u3002\r\n\r\nGNU C Library\u7684elf/rtld.c\u5185\u7684\u51fd\u6570process_envvars\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\uff0c\u672c\u5730\u653b\u51fb\u8005\u901a\u8fc7LD_POINTER_GUARD\u73af\u5883\u53d8\u91cf\u5185\u7684\u96f6\u503c\uff0c\u53ef\u7ed5\u8fc7\u6307\u9488\u9632\u62a4\u4fdd\u62a4\u673a\u5236\u3002",
  "discovererName": "unknown",
  "formalWay": "\u7528\u6237\u53ef\u53c2\u8003\u5982\u4e0b\u5382\u5546\u63d0\u4f9b\u7684\u5b89\u5168\u516c\u544a\u83b7\u53d6\u8865\u4e01\u4ee5\u4fee\u590d\u8be5\u6f0f\u6d1e\uff1a\r\nhttp://hmarco.org/bugs/glibc_ptr_mangle_weakness.html",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2016-00461",
  "openTime": "2016-01-26",
  "patchDescription": "glibc\u662fGNU\u53d1\u5e03\u7684libc\u5e93\uff0c\u5373c\u8fd0\u884c\u5e93\u3002\r\n\r\nGNU C Library\u7684elf/rtld.c\u5185\u7684\u51fd\u6570process_envvars\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\uff0c\u672c\u5730\u653b\u51fb\u8005\u901a\u8fc7LD_POINTER_GUARD\u73af\u5883\u53d8\u91cf\u5185\u7684\u96f6\u503c\uff0c\u53ef\u7ed5\u8fc7\u6307\u9488\u9632\u62a4\u4fdd\u62a4\u673a\u5236\u3002\u76ee\u524d\uff0c\u4f9b\u5e94\u5546\u53d1\u5e03\u4e86\u5b89\u5168\u516c\u544a\u53ca\u76f8\u5173\u8865\u4e01\u4fe1\u606f\uff0c\u4fee\u590d\u4e86\u6b64\u6f0f\u6d1e\u3002",
  "patchName": "GNU C Library\u5b89\u5168\u673a\u5236\u7ed5\u8fc7\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": "GNU glibc \u003c2.23"
  },
  "referenceLink": "http://hmarco.org/bugs/glibc_ptr_mangle_weakness.html",
  "serverity": "\u4f4e",
  "submitTime": "2016-01-21",
  "title": "GNU C Library\u5b89\u5168\u673a\u5236\u7ed5\u8fc7\u6f0f\u6d1e"
}

CVE-2015-8777 (GCVE-0-2015-8777)

Vulnerability from cvelistv5 – Published: 2016-01-20 02:00 – Updated: 2024-08-06 08:29

Summary

The process_envvars function in elf/rtld.c in the GNU C Library (aka glibc or libc6) before 2.23 allows local users to bypass a pointer-guarding protection mechanism via a zero value of the LD_POINTER_GUARD environment variable.

Severity

No CVSS data available.

CWE

Assigner

redhat redhat root

References

15 references

URL	Tags
http://lists.opensuse.org/opensuse-security-annou…	vendor-advisoryx_refsource_SUSE
https://access.redhat.com/errata/RHSA-2017:1916	vendor-advisoryx_refsource_REDHAT
http://hmarco.org/bugs/glibc_ptr_mangle_weakness.html	x_refsource_MISC
http://lists.opensuse.org/opensuse-security-annou…	vendor-advisoryx_refsource_SUSE
http://www.ubuntu.com/usn/USN-2985-2	vendor-advisoryx_refsource_UBUNTU
http://www.openwall.com/lists/oss-security/2016/01/20/1	mailing-listx_refsource_MLIST
https://security.gentoo.org/glsa/201702-11	vendor-advisoryx_refsource_GENTOO
http://lists.opensuse.org/opensuse-security-annou…	vendor-advisoryx_refsource_SUSE
http://lists.opensuse.org/opensuse-security-annou…	vendor-advisoryx_refsource_SUSE
http://www.securityfocus.com/bid/81469	vdb-entryx_refsource_BID
https://sourceware.org/bugzilla/show_bug.cgi?id=18928	x_refsource_CONFIRM
http://lists.fedoraproject.org/pipermail/package-…	vendor-advisoryx_refsource_FEDORA
http://www.debian.org/security/2016/dsa-3480	vendor-advisoryx_refsource_DEBIAN
http://www.ubuntu.com/usn/USN-2985-1	vendor-advisoryx_refsource_UBUNTU
http://www.securitytracker.com/id/1034811	vdb-entryx_refsource_SECTRACK

Date Public

2015-09-05 00:00

Show details on NVD website

JSON

To clipboard

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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.