Heap Buffer Overflow in libcurl Affects Multiple Versions by Curl
CVE-2018-16890

5.4MEDIUM

Key Information:

Vendor

The Curl Project

Status
Curl
Vendor
CVE Published:
6 February 2019

Badges

👾 Exploit Exists

What is CVE-2018-16890?

A vulnerability exists in libcurl versions from 7.36.0 to before 7.64.0, which can lead to a heap buffer out-of-bounds read. This issue arises due to improper validation of incoming NTLM type-2 messages in the ntlm_decode_type2_target function. If an attacker controls an NTLM server, they may exploit this vulnerability by providing a crafted length or offset value, which can result in the application reading beyond allocated memory, potentially leading to information disclosure or application instability.

Affected Version(s)

curl 7.64.0

References

https://www.debian.org/security/2019/dsa-4386
vendor-advisoryx_refsource_DEBIAN
http://www.securityfocus.com/bid/106947
vdb-entryx_refsource_BID
https://curl.haxx.se/docs/CVE-2018-16890.html
x_refsource_MISC

EPSS Score

5% chance of being exploited in the next 30 days.

CVSS V3.1

Score:
5.4
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

CVSS V3.0

Score:
5.4
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

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