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CVE-2017-6657

Quick assessment

Affected
n/a Snort 3.0 All versions prior to build 233.
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Cisco Sourcefire Snort是美国思科（Cisco）公司（原Snort团队）的一套网络入侵预防软件与网络入侵检测软件。该软件提供数据包嗅探、数据包分析和数据包检测等功能。 Cisco Sourcefire Snort build 233之前的3.0版本中的多个解码器存在安全漏洞，该漏洞源于程序没有正确的处理Type验证。攻击者可利用该漏洞造成拒绝服务（崩溃），多个解码器包括：gre，llc，trans_bridge，ciscometadata，linux_sll，token_ring。

AI Predicted 7.5 Difficulty: Easy EPSS 1.06% · P64

Possible ATT&CK Techniques 1 AI

T1218 · System Binary Proxy Execution
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I. Basic Information for CVE-2017-6657

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
Cisco Sourcefire Snort 3.0 before build 233 mishandles Ether Type Validation. Since valid ether type and IP protocol numbers do not overlap, Snort++ stores all protocol decoders in a single array. That makes it possible to craft packets that have IP protocol numbers in the ether type field which will confuse the Snort++ decoder. For example, an eth:llc:snap:icmp6 packet will cause a crash because there is no ip6 header with which to calculate the icmp6 checksum. Affected decoders include gre, llc, trans_bridge, ciscometadata, linux_sll, and token_ring. The fix adds a check in the packet manager to validate the ether type before indexing the decoder array. An out of range ether type will raise 116:473.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Cisco Sourcefire Snort 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cisco Sourcefire Snort是美国思科（Cisco）公司（原Snort团队）的一套网络入侵预防软件与网络入侵检测软件。该软件提供数据包嗅探、数据包分析和数据包检测等功能。 Cisco Sourcefire Snort build 233之前的3.0版本中的多个解码器存在安全漏洞，该漏洞源于程序没有正确的处理Type验证。攻击者可利用该漏洞造成拒绝服务（崩溃），多个解码器包括：gre，llc，trans_bridge，ciscometadata，linux_sll，token_ring。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
- Snort 3.0 All versions prior to build 233. Snort 3.0 All versions prior to build 233. -

II. Public POCs for CVE-2017-6657

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III. Intelligence Information for CVE-2017-6657

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Security Blog Posts for CVE-2017-6657 (1)

Same Patch Batch · n/a · 2017-05-16 · 12 CVEs total

CVE-2017-7952 Infor EAM SQL注入漏洞
CVE-2017-7953 Infor EAM 跨站脚本漏洞
CVE-2017-8382 Admidio 跨站请求伪造漏洞
CVE-2016-10372 Eir D1000 安全漏洞
CVE-2017-3825 多款Cisco产品TelePresence Collaboration Endpoint Software 安全漏洞
CVE-2017-3873 Cisco Aironet 1800、2800和3800 Series Access Points Plug-and-Play子系统安全漏洞
CVE-2017-3876 Cisco IOS XR Software 安全漏洞
CVE-2017-3882 Cisco CVR100W Wireless-N VPN Router 缓冲区错误漏洞
CVE-2017-6079 Edgewater Networks Edgemarc 安全漏洞
CVE-2017-6651 Cisco WebEx Meetings Server 信息泄露漏洞
CVE-2017-6658 Cisco Sourcefire Snort 缓冲区错误漏洞

IV. Related Vulnerabilities

Same product: Snort 3.0 All versions prior to build 233.
Same vendor: n/a

V. Comments for CVE-2017-6657

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