Vulnerability-Lookup

CNVD-2017-21505

Vulnerability from cnvd - Published: 2017-08-17

Title

Libgcrypt信息泄露漏洞（CNVD-2017-21505）

Description

Libgcrypt是GNU计划开发的一个基于GnuPG代码的通用加密库。该库实现了各种加密算法，包括对称密码、哈希算法、公开密钥算法等。 Libgcrypt 1.7.7及之前的版本中存在信息泄露漏洞。攻击者可利用该漏洞获取敏感信息。

Severity

中

Patch Name

Libgcrypt信息泄露漏洞（CNVD-2017-21505）的补丁

Patch Description

Libgcrypt是GNU计划开发的一个基于GnuPG代码的通用加密库。该库实现了各种加密算法，包括对称密码、哈希算法、公开密钥算法等。 Libgcrypt 1.7.7及之前的版本中存在信息泄露漏洞。攻击者可利用该漏洞获取敏感信息。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

用户可联系供应商获得补丁信息： https://gnupg.org/related_software/libgcrypt/

Reference

http://www.securityfocus.com/bid/99338/

Impacted products

Name
['GNU libgcrypt', 'GnuPG Libgcrypt <1.7.7']

Show details on source website

JSON

To clipboard

{
  "bids": {
    "bid": {
      "bidNumber": "99338"
    }
  },
  "cves": {
    "cve": {
      "cveNumber": "CVE-2017-7526"
    }
  },
  "description": "Libgcrypt\u662fGNU\u8ba1\u5212\u5f00\u53d1\u7684\u4e00\u4e2a\u57fa\u4e8eGnuPG\u4ee3\u7801\u7684\u901a\u7528\u52a0\u5bc6\u5e93\u3002\u8be5\u5e93\u5b9e\u73b0\u4e86\u5404\u79cd\u52a0\u5bc6\u7b97\u6cd5\uff0c\u5305\u62ec\u5bf9\u79f0\u5bc6\u7801\u3001\u54c8\u5e0c\u7b97\u6cd5\u3001\u516c\u5f00\u5bc6\u94a5\u7b97\u6cd5\u7b49\u3002\r\n\r\nLibgcrypt 1.7.7\u53ca\u4e4b\u524d\u7684\u7248\u672c\u4e2d\u5b58\u5728\u4fe1\u606f\u6cc4\u9732\u6f0f\u6d1e\u3002\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u83b7\u53d6\u654f\u611f\u4fe1\u606f\u3002",
  "discovererName": "Libgcrypt project",
  "formalWay": "\u7528\u6237\u53ef\u8054\u7cfb\u4f9b\u5e94\u5546\u83b7\u5f97\u8865\u4e01\u4fe1\u606f\uff1a\r\nhttps://gnupg.org/related_software/libgcrypt/",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2017-21505",
  "openTime": "2017-08-17",
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  "products": {
    "product": [
      "GNU libgcrypt",
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    ]
  },
  "referenceLink": "http://www.securityfocus.com/bid/99338/",
  "serverity": "\u4e2d",
  "submitTime": "2017-07-03",
  "title": "Libgcrypt\u4fe1\u606f\u6cc4\u9732\u6f0f\u6d1e\uff08CNVD-2017-21505\uff09"
}

CVE-2017-7526 (GCVE-0-2017-7526)

Vulnerability from cvelistv5 – Published: 2018-07-26 13:00 – Updated: 2025-12-17 22:06

Summary

libgcrypt before version 1.7.8 is vulnerable to a cache side-channel attack resulting into a complete break of RSA-1024 while using the left-to-right method for computing the sliding-window expansion. The same attack is believed to work on RSA-2048 with moderately more computation. This side-channel requires that attacker can run arbitrary software on the hardware where the private RSA key is used.

Severity

6.1 (Medium)


                        
                          CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:N/A:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-12-17 22:06 UTC

CWE

CWE-200

Assigner

redhat redhat root

References

12 references

URL	Tags
https://usn.ubuntu.com/3733-1/	vendor-advisoryx_refsource_UBUNTU
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2…	x_refsource_CONFIRM
http://www.securitytracker.com/id/1038915	vdb-entryx_refsource_SECTRACK
https://www.debian.org/security/2017/dsa-3960	vendor-advisoryx_refsource_DEBIAN
https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcr…	x_refsource_CONFIRM
https://www.debian.org/security/2017/dsa-3901	vendor-advisoryx_refsource_DEBIAN
https://usn.ubuntu.com/3733-2/	vendor-advisoryx_refsource_UBUNTU
https://eprint.iacr.org/2017/627	x_refsource_MISC
http://www.securityfocus.com/bid/99338	vdb-entryx_refsource_BID
https://lists.gnupg.org/pipermail/gnupg-announce/…	mailing-listx_refsource_MLIST
https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcr…	x_refsource_CONFIRM
https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcr…	x_refsource_CONFIRM

Impacted products

1 product

Vendor	Product	Version
GnuPG	libgcrypt	Affected: 1.7.8

Date Public

2017-06-29 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.