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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
SHA-256 | 7ff194be1ef6e345bac33f6db0c2870bd8420e769ad1819a796d665aa8b116e1
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
SHA-256 | 7b295ee612fd47e8561e865b6ce95775caadd490653734d95071b885946efb5a
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
SHA-256 | 4e0f3be81c17eccb811b09f0977fe023a0b78c12dac6aa24244460450774460d
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
SHA-256 | 6e258f8259c823ad99ace2e5dacdc5049329213737fd43379b9c36d75dfc7dd4
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
SHA-256 | 14096838d0d04a2c7293306d0348996f3bc0573fc8dac84c87bec5efcb0a8b1b
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
SHA-256 | bbcf61aaad1ed97d1ae1784f4ceeac29a2930166d62674c6c527d9a84a30d1db
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