Vulnerability-Lookup

CNVD-2019-26805

Vulnerability from cnvd - Published: 2019-08-12

Title

libssh2输入验证错误漏洞

Description

libssh2是一款实现SSH2协议的客户端C库，它能够执行远程命令、文件传输，同时为远程的程序提供安全的传输通道。 libssh2 1.9.0之前版本中的kex.c文件的ex_method_diffie_hellman_group_exchange_sha256_key_exchange存在输入验证错误漏洞。该漏洞源于网络系统或产品未对输入的数据进行正确的验证。目前没有详细的漏洞细节提供。

Severity

中

Formal description

目前厂商已发布升级补丁以修复漏洞，补丁获取链接： https://libssh2.org/changes.html

Reference

https://nvd.nist.gov/vuln/detail/CVE-2019-13115

Impacted products

Name
libssh2 libssh2 <1.9.0

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2019-13115"
    }
  },
  "description": "libssh2\u662f\u4e00\u6b3e\u5b9e\u73b0SSH2\u534f\u8bae\u7684\u5ba2\u6237\u7aefC\u5e93\uff0c\u5b83\u80fd\u591f\u6267\u884c\u8fdc\u7a0b\u547d\u4ee4\u3001\u6587\u4ef6\u4f20\u8f93\uff0c\u540c\u65f6\u4e3a\u8fdc\u7a0b\u7684\u7a0b\u5e8f\u63d0\u4f9b\u5b89\u5168\u7684\u4f20\u8f93\u901a\u9053\u3002\n\nlibssh2 1.9.0\u4e4b\u524d\u7248\u672c\u4e2d\u7684kex.c\u6587\u4ef6\u7684ex_method_diffie_hellman_group_exchange_sha256_key_exchange\u5b58\u5728\u8f93\u5165\u9a8c\u8bc1\u9519\u8bef\u6f0f\u6d1e\u3002\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u7f51\u7edc\u7cfb\u7edf\u6216\u4ea7\u54c1\u672a\u5bf9\u8f93\u5165\u7684\u6570\u636e\u8fdb\u884c\u6b63\u786e\u7684\u9a8c\u8bc1\u3002\u76ee\u524d\u6ca1\u6709\u8be6\u7ec6\u7684\u6f0f\u6d1e\u7ec6\u8282\u63d0\u4f9b\u3002",
  "discovererName": "unknwon",
  "formalWay": "\u76ee\u524d\u5382\u5546\u5df2\u53d1\u5e03\u5347\u7ea7\u8865\u4e01\u4ee5\u4fee\u590d\u6f0f\u6d1e\uff0c\u8865\u4e01\u83b7\u53d6\u94fe\u63a5\uff1a\r\nhttps://libssh2.org/changes.html",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2019-26805",
  "openTime": "2019-08-12",
  "products": {
    "product": "libssh2 libssh2 \u003c1.9.0"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2019-13115",
  "serverity": "\u4e2d",
  "submitTime": "2019-07-18",
  "title": "libssh2\u8f93\u5165\u9a8c\u8bc1\u9519\u8bef\u6f0f\u6d1e"
}

CVE-2019-13115 (GCVE-0-2019-13115)

Vulnerability from cvelistv5 – Published: 2019-07-16 00:00 – Updated: 2024-08-04 23:41

Summary

In libssh2 before 1.9.0, kex_method_diffie_hellman_group_exchange_sha256_key_exchange in kex.c has an integer overflow that could lead to an out-of-bounds read in the way packets are read from the server. A remote attacker who compromises a SSH server may be able to disclose sensitive information or cause a denial of service condition on the client system when a user connects to the server. This is related to an _libssh2_check_length mistake, and is different from the various issues fixed in 1.8.1, such as CVE-2019-3855.

Severity

No CVSS data available.

CWE

Assigner

mitre mitre root

References

15 references

URL	Tags
https://github.com/libssh2/libssh2/pull/350
https://libssh2.org/changes.html
https://github.com/libssh2/libssh2/compare/02ecf1…
https://blog.semmle.com/libssh2-integer-overflow/
https://lists.debian.org/debian-lts-announce/2019…	mailing-list
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisory
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisory
https://security.netapp.com/advisory/ntap-2019080…
https://support.f5.com/csp/article/K13322484
https://support.f5.com/csp/article/K13322484?utm_…
https://lists.apache.org/thread.html/rf4c02775860…	mailing-list
https://lists.apache.org/thread.html/r58af02e294b…	mailing-list
https://lists.debian.org/debian-lts-announce/2021…	mailing-list
http://packetstormsecurity.com/files/172834/libss…
https://lists.debian.org/debian-lts-announce/2023…	mailing-list

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.