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Integer Overflow or Wraparound Affecting curl package, versions <7.61.1-r0

Severity

 Recommended
0.0
critical
0
10

Snyk's Security Team recommends NVD's CVSS assessment

    Threat Intelligence

    EPSS
    1.16% (86th percentile)

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  • Snyk ID SNYK-ALPINE316-CURL-2842163
  • published 25 Sep 2018
  • disclosed 5 Sep 2018
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Introduced: 5 Sep 2018

CVE-2018-14618 Open this link in a new tab
CWE-190 Open this link in a new tab
CWE-122 Open this link in a new tab
CWE-131 Open this link in a new tab

How to fix?

Upgrade Alpine:3.16 curl to version 7.61.1-r0 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream curl package and not the curl package as distributed by Alpine. See How to fix? for Alpine:3.16 relevant fixed versions and status.

curl before version 7.61.1 is vulnerable to a buffer overrun in the NTLM authentication code. The internal function Curl_ntlm_core_mk_nt_hash multiplies the length of the password by two (SUM) to figure out how large temporary storage area to allocate from the heap. The length value is then subsequently used to iterate over the password and generate output into the allocated storage buffer. On systems with a 32 bit size_t, the math to calculate SUM triggers an integer overflow when the password length exceeds 2GB (2^31 bytes). This integer overflow usually causes a very small buffer to actually get allocated instead of the intended very huge one, making the use of that buffer end up in a heap buffer overflow. (This bug is almost identical to CVE-2017-8816.)