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Title
libpng 'png_image_free'函数内存错误引用漏洞
Description
libpng是一个可对PNG图形文件实现创建、读写等操作的PNG参考库。
libpng 1.6.36版本中的png.c文件的'png_image_free'函数存在内存错误引用漏洞。攻击者可借助特制的文件利用该漏洞造成拒绝服务。
Severity
中
Formal description
目前厂商暂未发布修复措施解决此安全问题，建议使用此软件的用户随时关注厂商主页或参考网址以获取解决办法： http://www.libpng.org/
Reference
https://seclists.org/bugtraq/2019/Apr/30
Impacted products
| Name | libpng libpng 1.6.36 |
|---|
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"cves": {
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"description": "libpng\u662f\u4e00\u4e2a\u53ef\u5bf9PNG\u56fe\u5f62\u6587\u4ef6\u5b9e\u73b0\u521b\u5efa\u3001\u8bfb\u5199\u7b49\u64cd\u4f5c\u7684PNG\u53c2\u8003\u5e93\u3002\n\nlibpng 1.6.36\u7248\u672c\u4e2d\u7684png.c\u6587\u4ef6\u7684\u0027png_image_free\u0027\u51fd\u6570\u5b58\u5728\u5185\u5b58\u9519\u8bef\u5f15\u7528\u6f0f\u6d1e\u3002\u653b\u51fb\u8005\u53ef\u501f\u52a9\u7279\u5236\u7684\u6587\u4ef6\u5229\u7528\u8be5\u6f0f\u6d1e\u9020\u6210\u62d2\u7edd\u670d\u52a1\u3002",
"discovererName": "unknwon",
"formalWay": "\u76ee\u524d\u5382\u5546\u6682\u672a\u53d1\u5e03\u4fee\u590d\u63aa\u65bd\u89e3\u51b3\u6b64\u5b89\u5168\u95ee\u9898\uff0c\u5efa\u8bae\u4f7f\u7528\u6b64\u8f6f\u4ef6\u7684\u7528\u6237\u968f\u65f6\u5173\u6ce8\u5382\u5546\u4e3b\u9875\u6216\u53c2\u8003\u7f51\u5740\u4ee5\u83b7\u53d6\u89e3\u51b3\u529e\u6cd5\uff1a\r\nhttp://www.libpng.org/",
"isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
"number": "CNVD-2019-11838",
"openTime": "2019-04-22",
"products": {
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},
"referenceLink": "https://seclists.org/bugtraq/2019/Apr/30",
"serverity": "\u4e2d",
"submitTime": "2019-04-22",
"title": "libpng \u0027png_image_free\u0027\u51fd\u6570\u5185\u5b58\u9519\u8bef\u5f15\u7528\u6f0f\u6d1e"
}
CVE-2019-7317 (GCVE-0-2019-7317)
Vulnerability from cvelistv5 – Published: 2019-02-04 07:00 – Updated: 2026-05-28 18:24
VLAI
EPSS
VEX
Summary
png_image_free in png.c in libpng 1.6.x before 1.6.37 has a use-after-free because png_image_free_function is called under png_safe_execute.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-28 18:24 UTC
CWE
- n/a
- CWE-416 - Use After Free
Assigner
References
42 references
Date Public
2019-02-04 00:00
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Trend slope:
-
(linear fit over daily sighting counts)
Show additional events:
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Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
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.
Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
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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.
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.
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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.
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