Vulnerability-Lookup

CNVD-2021-31940

Vulnerability from cnvd - Published: 2021-04-30

Title

Jason Summers deark空指针解引用漏洞

Description

Jason Summers deark是Jason Summers开源的一个应用软件。一个命令行实用程序，可以解码某些类型的文件。 Jason Summers deark1.5.8之前版本中的src/deark-dbuf.c中的dbuf_write函数存在空指针解引用漏洞，攻击者可通过特制输入文件利用该漏洞导致空指针解引用。

Severity

中

Patch Name

Jason Summers deark空指针解引用漏洞的补丁

Patch Description

Formal description

厂商已发布了漏洞修复程序，请及时关注更新： https://github.com/jsummers/deark/commit/287f5ac31dfdc074669182f51ece637706070eeb

Reference

https://nvd.nist.gov/vuln/detail/CVE-2021-28855

Impacted products

Name
Jason Summers deark <1.5.8

Show details on source website

JSON

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      "cveNumber": "CVE-2021-28855",
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  "number": "CNVD-2021-31940",
  "openTime": "2021-04-30",
  "patchDescription": "Jason Summers deark\u662fJason Summers\u5f00\u6e90\u7684\u4e00\u4e2a\u5e94\u7528\u8f6f\u4ef6\u3002\u4e00\u4e2a\u547d\u4ee4\u884c\u5b9e\u7528\u7a0b\u5e8f\uff0c\u53ef\u4ee5\u89e3\u7801\u67d0\u4e9b\u7c7b\u578b\u7684\u6587\u4ef6\u3002\r\n\r\nJason Summers deark1.5.8\u4e4b\u524d\u7248\u672c\u4e2d\u7684src/deark-dbuf.c\u4e2d\u7684dbuf_write\u51fd\u6570\u5b58\u5728\u7a7a\u6307\u9488\u89e3\u5f15\u7528\u6f0f\u6d1e\uff0c\u653b\u51fb\u8005\u53ef\u901a\u8fc7\u7279\u5236\u8f93\u5165\u6587\u4ef6\u5229\u7528\u8be5\u6f0f\u6d1e\u5bfc\u81f4\u7a7a\u6307\u9488\u89e3\u5f15\u7528\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",
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  "submitTime": "2021-04-15",
  "title": "Jason Summers deark\u7a7a\u6307\u9488\u89e3\u5f15\u7528\u6f0f\u6d1e"
}

CVE-2021-28855 (GCVE-0-2021-28855)

Vulnerability from cvelistv5 – Published: 2021-04-14 16:11 – Updated: 2026-01-26 16:23

Summary

In Deark before 1.5.8, a specially crafted input file can cause a NULL pointer dereference in the dbuf_write function (src/deark-dbuf.c).

Severity

No CVSS data available.

CWE

Assigner

mitre mitre root

References

3 references

URL	Tags
https://fatihhcelik.github.io/posts/NULL-Pointer-…
https://github.com/jsummers/deark/commit/287f5ac3…
https://github.com/fuzzing2026/CVE-PoCs/tree/main…

Show details on NVD website

JSON

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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.