Vulnerability-Lookup

CNVD-2020-33261

Vulnerability from cnvd - Published: 2020-06-15

Title

RE2C缓冲区溢出漏洞

Description

re2c是一款开源的C语言和C++语言生成器。 re2c 1.3版本中的Scanner.cc文件的‘Scanner ：： fill’函数存在缓冲区溢出漏洞，该漏洞源于程序未能正确进行边界检查。远程攻击者可借助特制文件利用该漏洞在系统上执行任意代码。

Severity

高

Patch Name

RE2C缓冲区溢出漏洞的补丁

Patch Description

re2c是一款开源的C语言和C++语言生成器。 re2c 1.3版本中的Scanner.cc文件的‘Scanner ：： fill’函数存在缓冲区溢出漏洞，该漏洞源于程序未能正确进行边界检查。远程攻击者可借助特制文件利用该漏洞在系统上执行任意代码。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

目前厂商已发布升级补丁以修复漏洞，补丁获取链接： https://github.com/skvadrik/re2c/commit/c4603ba5ce229db83a2a4fb93e6d4b4e3ec3776a

Reference

https://nvd.nist.gov/vuln/detail/CVE-2020-11958

Impacted products

Name
re2c RE2C 1.3

Show details on source website

JSON

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{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2020-11958"
    }
  },
  "description": "re2c\u662f\u4e00\u6b3e\u5f00\u6e90\u7684C\u8bed\u8a00\u548cC++\u8bed\u8a00\u751f\u6210\u5668\u3002\n\nre2c 1.3\u7248\u672c\u4e2d\u7684Scanner.cc\u6587\u4ef6\u7684\u2018Scanner \uff1a\uff1a fill\u2019\u51fd\u6570\u5b58\u5728\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u7a0b\u5e8f\u672a\u80fd\u6b63\u786e\u8fdb\u884c\u8fb9\u754c\u68c0\u67e5\u3002\u8fdc\u7a0b\u653b\u51fb\u8005\u53ef\u501f\u52a9\u7279\u5236\u6587\u4ef6\u5229\u7528\u8be5\u6f0f\u6d1e\u5728\u7cfb\u7edf\u4e0a\u6267\u884c\u4efb\u610f\u4ee3\u7801\u3002",
  "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://github.com/skvadrik/re2c/commit/c4603ba5ce229db83a2a4fb93e6d4b4e3ec3776a",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2020-33261",
  "openTime": "2020-06-15",
  "patchDescription": "re2c\u662f\u4e00\u6b3e\u5f00\u6e90\u7684C\u8bed\u8a00\u548cC++\u8bed\u8a00\u751f\u6210\u5668\u3002\r\n\r\nre2c 1.3\u7248\u672c\u4e2d\u7684Scanner.cc\u6587\u4ef6\u7684\u2018Scanner \uff1a\uff1a fill\u2019\u51fd\u6570\u5b58\u5728\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u7a0b\u5e8f\u672a\u80fd\u6b63\u786e\u8fdb\u884c\u8fb9\u754c\u68c0\u67e5\u3002\u8fdc\u7a0b\u653b\u51fb\u8005\u53ef\u501f\u52a9\u7279\u5236\u6587\u4ef6\u5229\u7528\u8be5\u6f0f\u6d1e\u5728\u7cfb\u7edf\u4e0a\u6267\u884c\u4efb\u610f\u4ee3\u7801\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": "RE2C\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": "re2c RE2C 1.3"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2020-11958",
  "serverity": "\u9ad8",
  "submitTime": "2020-04-21",
  "title": "RE2C\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e"
}

CVE-2020-11958 (GCVE-0-2020-11958)

Vulnerability from cvelistv5 – Published: 2020-04-21 00:37 – Updated: 2024-08-04 11:42

Summary

re2c 1.3 has a heap-based buffer overflow in Scanner::fill in parse/scanner.cc via a long lexeme.

Severity

No CVSS data available.

CWE

Assigner

mitre mitre root Scorecard

References

7 references

URL	Tags
https://blogs.gentoo.org/ago/2020/04/19/re2c-heap…	x_refsource_MISC
https://www.openwall.com/lists/oss-security/2020/…	x_refsource_MISC
https://github.com/skvadrik/re2c/commit/c4603ba5c…	x_refsource_MISC
http://www.openwall.com/lists/oss-security/2020/04/21/1	mailing-listx_refsource_MLIST
https://usn.ubuntu.com/4338-1/	vendor-advisoryx_refsource_UBUNTU
https://usn.ubuntu.com/4338-2/	vendor-advisoryx_refsource_UBUNTU
https://security.gentoo.org/glsa/202007-28	vendor-advisoryx_refsource_GENTOO

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.

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.
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CNVD-2020-33261

CVE-2020-11958 (GCVE-0-2020-11958)

Tags

Sightings

Nomenclature

Related by attack behaviour