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CVE-2018-14618

Status Candidate

Overview

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.)

Related Files

Red Hat Security Advisory 2019-1880-01
Posted Jul 29, 2019
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2019-1880-01 - The curl packages provide the libcurl library and the curl utility for downloading files from servers using various protocols, including HTTP, FTP, and LDAP. An NTLM password overflow via integer overflow issue was addressed.

tags | advisory, web, overflow, protocol
systems | linux, redhat
advisories | CVE-2018-14618
MD5 | f20180ddc8d7518634c8febc673e0968
Gentoo Linux Security Advisory 201903-03
Posted Mar 11, 2019
Authored by Gentoo | Site security.gentoo.org

Gentoo Linux Security Advisory 201903-3 - Multiple vulnerabilities have been found in cURL, the worst of which could result in a Denial of Service condition. Versions less than 7.64.0 are affected.

tags | advisory, denial of service, vulnerability
systems | linux, gentoo
advisories | CVE-2018-14618, CVE-2018-16839, CVE-2018-16840, CVE-2018-16842, CVE-2019-3822, CVE-2019-3823
MD5 | 2f866be211b86ff71d0279d185e7082f
Ubuntu Security Notice USN-3765-2
Posted Sep 17, 2018
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3765-2 - USN-3765-1 fixed a vulnerability in curl. This update provides the corresponding update for Ubuntu 12.04 ESM. It was discovered that curl incorrectly handled certain inputs. An attacker could possibly use this to execute arbitrary code.

tags | advisory, arbitrary
systems | linux, ubuntu
advisories | CVE-2018-14618
MD5 | 046498323331b3221476fc8637909661
Ubuntu Security Notice USN-3765-1
Posted Sep 17, 2018
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3765-1 - It was discovered that curl incorrectly handled certain inputs. An attacker could possibly use this to execute arbitrary code.

tags | advisory, arbitrary
systems | linux, ubuntu
advisories | CVE-2018-14618
MD5 | a456fd55f32a80ce8985878450202aa9
Slackware Security Advisory - curl Updates
Posted Sep 6, 2018
Authored by Slackware Security Team | Site slackware.com

Slackware Security Advisory - New curl packages are available for Slackware 14.0, 14.1, 14.2, and -current to fix security issues.

tags | advisory
systems | linux, slackware
advisories | CVE-2018-14618
MD5 | 767b52f604d65b366f9813f69d5d648f
Debian Security Advisory 4286-1
Posted Sep 6, 2018
Authored by Debian | Site debian.org

Debian Linux Security Advisory 4286-1 - Zhaoyang Wu discovered that cURL, an URL transfer library, contains a buffer overflow in the NTLM authentication code triggered by passwords that exceed 2GB in length on 32bit systems.

tags | advisory, overflow
systems | linux, debian
advisories | CVE-2018-14618
MD5 | 1c2a320358f153133062444a0f5d9c7f
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