libcurl versions from 7.36.0 to before 7.64.0 are vulnerable to a stack-based buffer overflow. The function creating an outgoing NTLM type-3 header (`lib/vauth/ntlm.c:Curl_auth_create_ntlm_type3_message()`), generates the request HTTP header contents based on previously received data. The check that exists to prevent the local buffer from getting overflowed is implemented wrongly (using unsigned math) and as such it does not prevent the overflow from happening. This output data can grow larger than the local buffer if very large 'nt response' data is extracted from a previous NTLMv2 header provided by the malicious or broken HTTP server. Such a 'large value' needs to be around 1000 bytes or more. The actual payload data copied to the target buffer comes from the NTLMv2 type-2 response header.

The remote Oracle Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2019-3701 advisory.

  - set_file_metadata in xattr.c in GNU Wget before 1.20.1 stores a file's origin URL in the     user.xdg.origin.url metadata attribute of the extended attributes of the downloaded file, which allows     local users to obtain sensitive information (e.g., credentials contained in the URL) by reading this     attribute, as demonstrated by getfattr. This also applies to Referer information in the     user.xdg.referrer.url metadata attribute. According to 2016-07-22 in the Wget ChangeLog,     user.xdg.origin.url was partially based on the behavior of fwrite_xattr in tool_xattr.c in curl.
    (CVE-2018-20483)

  - libcurl versions from 7.34.0 to before 7.64.0 are vulnerable to a heap out-of-bounds read in the code     handling the end-of-response for SMTP. If the buffer passed to `smtp_endofresp()` isn't NUL terminated and     contains no character ending the parsed number, and `len` is set to 5, then the `strtol()` call reads     beyond the allocated buffer. The read contents will not be returned to the caller. (CVE-2019-3823)

  - libcurl versions from 7.36.0 to before 7.64.0 is vulnerable to a heap buffer out-of-bounds read. The     function handling incoming NTLM type-2 messages (`lib/vauth/ntlm.c:ntlm_decode_type2_target`) does not     validate incoming data correctly and is subject to an integer overflow vulnerability. Using that overflow,     a malicious or broken NTLM server could trick libcurl to accept a bad length + offset combination that     would lead to a buffer read out-of-bounds. (CVE-2018-16890)

  - libcurl versions from 7.36.0 to before 7.64.0 are vulnerable to a stack-based buffer overflow. The     function creating an outgoing NTLM type-3 header     (`lib/vauth/ntlm.c:Curl_auth_create_ntlm_type3_message()`), generates the request HTTP header contents     based on previously received data. The check that exists to prevent the local buffer from getting     overflowed is implemented wrongly (using unsigned math) and as such it does not prevent the overflow from     happening. This output data can grow larger than the local buffer if very large 'nt response' data is     extracted from a previous NTLMv2 header provided by the malicious or broken HTTP server. Such a 'large     value' needs to be around 1000 bytes or more. The actual payload data copied to the target buffer comes     from the NTLMv2 type-2 response header. (CVE-2019-3822)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote CentOS Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the CESA-2019:3701 advisory.

  - curl: NTLM type-2 heap out-of-bounds buffer read (CVE-2018-16890)

  - wget: Information exposure in set_file_metadata function in xattr.c (CVE-2018-20483)

  - curl: NTLMv2 type-3 header stack buffer overflow (CVE-2019-3822)

  - curl: SMTP end-of-response out-of-bounds read (CVE-2019-3823)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

An update of the curl package has been released.

An update for curl is now available for Red Hat Enterprise Linux 8.

Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

The curl packages provide the libcurl library and the curl utility for downloading files from servers using various protocols, including HTTP, FTP, and LDAP.

Security Fix(es) :

* curl: NTLM type-2 heap out-of-bounds buffer read (CVE-2018-16890)

* wget: Information exposure in set_file_metadata function in xattr.c (CVE-2018-20483)

* curl: NTLMv2 type-3 header stack-based buffer overflow (CVE-2019-3822)

* curl: SMTP end-of-response out-of-bounds read (CVE-2019-3823)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Additional Changes :

For detailed information on changes in this release, see the Red Hat Enterprise Linux 8.1 Release Notes linked from the References section.

A stack-based buffer overflow vulnerability in the 'Server: Packaging (cURL)' subcomponent could allow an unauthenticated attacker to gain complete control of an affected instance of MySQL Server.
(CVE-2019-3822)

Vulnerability in the MySQL Server component of Oracle MySQL (subcomponent: Server: XML). Supported versions that are affected are 5.6.44 and prior, 5.7.26 and prior and 8.0.16 and prior. Easily exploitable vulnerability allows low privileged attacker with network access via multiple protocols to compromise MySQL Server. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of MySQL Server. CVSS 3.0 Base Score 6.5 (Availability impacts). CVSS Vector:
(CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H). (CVE-2019-2740)

Vulnerability in the MySQL Server component of Oracle MySQL (subcomponent: Server: Parser). Supported versions that are affected are 5.6.44 and prior, 5.7.26 and prior and 8.0.16 and prior. Easily exploitable vulnerability allows low privileged attacker with network access via multiple protocols to compromise MySQL Server. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of MySQL Server. CVSS 3.0 Base Score 6.5 (Availability impacts). CVSS Vector:
(CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H). (CVE-2019-2805)

Oracle reports :

This Critical Patch Update contains 45 new security fixes for Oracle MySQL. 4 of these vulnerabilities may be remotely exploitable without authentication, i.e., may be exploited over a network without requiring user credentials.

The version of MySQL running on the remote host is 5.7.x prior to 5.7.27. It is, therefore, affected by multiple vulnerabilities, including three of the top vulnerabilities below, as noted in the July 2019 Critical Patch Update advisory:

  - A stack-based buffer overflow vulnerability in the     'Server: Packaging (cURL)' subcomponent could allow an     unauthenticated attacker to gain complete control of an     affected instance of MySQL Server. (CVE-2019-3822)

  - A vulnerability in the 'Server: Parser' subcomponent.
    This is an easily exploitable vulnerability that allows     a low privileged attacker with network access via     multiple protocols to compromise the server. Successful     attacks involving this vulnerability can result in the     unauthorized ability to cause a hang or frequently     repeatable crash (complete DOS). (CVE-2019-2805)

  - A vulnerability in the 'Server: XML' subcomponent. This     is an easily exploitable vulnerability that allows a     low privileged attacker with network access via multiple     protocols to compromise a server.Successful attacks     involving this vulnerability can result in the     unauthorized ability to cause a hang or frequently     repeatable crash (complete DOS).
    (CVE-2019-2740)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The version of Oracle Enterprise Manager Cloud Control installed on the remote host is affected by multiple vulnerabilities in Enterprise Manager Base Platform component:

  - An unspecified vulnerability in Networking (cURL) subcomponent     of Oracle Enterprise Manager Ops Center, which could allow     an unauthenticated attacker with network access to     compromise Enterprise Manager Ops Center. (CVE-2019-3822)

  - An unspecified vulnerability in Networking (OpenSSL) subcomponent     of Oracle Enterprise Manager Ops Center, which could allow     an unauthenticated attacker with network access to     compromise Enterprise Manager Ops Center. (CVE-2019-1559)

  - An unspecified vulnerability in Networking (OpenSSL) subcomponent     of Oracle Enterprise Manager Ops Center, which could allow     a low privileged attacker with network access to     compromise Enterprise Manager Ops Center. (CVE-2019-2728)

The version of MySQL running on the remote host is 8.0.x prior to 8.0.16. It is, therefore, affected by multiple vulnerabilities, including four of the top vulnerabilities below, as noted in the April 2019 and July 2019 Critical Patch Update advisories:

  - An unspecified vulnerability in the 'Server: Packaging     (cURL)' subcomponent could allow an unauthenticated     attacker to gain complete control of an affected instance     of MySQL Server. (CVE-2019-3822)

  - An unspecified vulnerability in the 'Server: Pluggable     Auth' subcomponent could allow an unauthenticated     attacker to gain complete access to all MySQL Server     accessible data. (CVE-2019-2632)

  - Multiple denial of service vulnerabilities exist in the     'Server: Optimizer' subcomponent and could allow a low     priviledged attacker to cause the server to hang or to,     via a frequently repeatable crash, cause a complete     denial of service. (CVE-2019-2693, CVE-2019-2694,     CVE-2019-2695)

  - An unspecified vulnerability in the     'Server: Compiling (OpenSSL)' subcomponent could allow     an unauthenticated attacker to gain complete access to     all MySQL Server accessible data. (CVE-2019-1559)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The version of Oracle HTTP Server installed on the remote host is affected by a stack-based buffer overflow as noted in the April 2019 CPU advisory. The condition exists in the included cURL library due to using unsigned math when preventing the overflow. An unauthenticated, remote attacker can exploit this, via a specially crafted HTTP request, to cause a denial of service condition or the execution of arbitrary code.

The remote host is affected by the vulnerability described in GLSA-201903-03 (cURL: Multiple vulnerabilities)

    Multiple vulnerabilities have been discovered in cURL. Please review the       CVE identifiers referenced below for details.
  Impact :

    Remote attackers could cause a Denial of Service condition.
  Workaround :

    There is no known workaround at this time.

libcurl is vulnerable to a heap buffer out-of-bounds read. The function handling incoming NTLM type-2 messages (`lib/vauth/ntlm.c:ntlm_decode_type2_target`) does not validate incoming data correctly and is subject to an integer overflow vulnerability. Using that overflow, a malicious or broken NTLM server could trick libcurl to accept a bad length + offset combination that would lead to a buffer read out-of-bounds.(CVE-2018-16890)

The NTLM authentication feature in curl and libcurl before 7.57.0 on 32-bit platforms allows attackers to cause a denial of service (integer overflow and resultant buffer overflow, and application crash) or possibly have unspecified other impact via vectors involving long user and password fields.(CVE-2017-8816)

curl and libcurl before 7.57.0 on 32-bit platforms allow attackers to cause a denial of service (out-of-bounds access and application crash) or possibly have unspecified other impact because too little memory is allocated for interfacing to an SSL library.(CVE-2017-8818)

libcurl may read outside of a heap allocated buffer when doing FTP.
When libcurl connects to an FTP server and successfully logs in (anonymous or not), it asks the server for the current directory with the `PWD` command. The server then responds with a 257 response containing the path, inside double quotes. The returned path name is then kept by libcurl for subsequent uses. Due to a flaw in the string parser for this directory name, a directory name passed like this but without a closing double quote would lead to libcurl not adding a trailing NUL byte to the buffer holding the name. When libcurl would then later access the string, it could read beyond the allocated heap buffer and crash or wrongly access data beyond the buffer, thinking it was part of the path. A malicious server could abuse this fact and effectively prevent libcurl-based clients to work with it - the PWD command is always issued on new FTP connections and the mistake has a high chance of causing a segfault. The simple fact that this has issue remained undiscovered for this long could suggest that malformed PWD responses are rare in benign servers. We are not aware of any exploit of this flaw. This bug was introduced in commit [415d2e7cb7](https://github.com/curl/curl/commit/415d2e7cb7), March 2005. In libcurl version 7.56.0, the parser always zero terminates the string but also rejects it if not terminated properly with a final double quote.(CVE-2017-1000254)

Curl versions 7.14.1 through 7.61.1 are vulnerable to a heap-based buffer over-read in the tool_msgs.c:voutf() function that may result in information exposure and denial of service.(CVE-2018-16842)

libcurl is vulnerable to a stack-based buffer overflow. The function creating an outgoing NTLM type-3 header (`lib/vauth/ntlm.c:Curl_auth_create_ntlm_type3_message()`), generates the request HTTP header contents based on previously received data.
The check that exists to prevent the local buffer from getting overflowed is implemented wrongly (using unsigned math) and as such it does not prevent the overflow from happening. This output data can grow larger than the local buffer if very large 'nt response' data is extracted from a previous NTLMv2 header provided by the malicious or broken HTTP server. Such a 'large value' needs to be around 1000 bytes or more. The actual payload data copied to the target buffer comes from the NTLMv2 type-2 response header.(CVE-2019-3822)

libcurl is vulnerable to a heap out-of-bounds read in the code handling the end-of-response for SMTP. If the buffer passed to `smtp_endofresp()` isn't NUL terminated and contains no character ending the parsed number, and `len` is set to 5, then the `strtol()` call reads beyond the allocated buffer. The read contents will not be returned to the caller.(CVE-2019-3823)

The FTP wildcard function in curl and libcurl before 7.57.0 allows remote attackers to cause a denial of service (out-of-bounds read and application crash) or possibly have unspecified other impact via a string that ends with an '[' character.(CVE-2017-8817)

set_file_metadata in xattr.c in GNU Wget before 1.20.1 stores a file's origin URL in the user.xdg.origin.url metadata attribute of the extended attributes of the downloaded file, which allows local users to obtain sensitive information (e.g., credentials contained in the URL) by reading this attribute, as demonstrated by getfattr. This also applies to Referer information in the user.xdg.referrer.url metadata attribute. According to 2016-07-22 in the Wget ChangeLog, user.xdg.origin.url was partially based on the behavior of fwrite_xattr in tool_xattr.c in curl.(CVE-2018-20483)

A buffer overrun flaw was found in the IMAP handler of libcurl. By tricking an unsuspecting user into connecting to a malicious IMAP server, an attacker could exploit this flaw to potentially cause information disclosure or crash the application.(CVE-2017-1000257)

A heap use-after-free flaw was found in curl versions from 7.59.0 through 7.61.1 in the code related to closing an easy handle. When closing and cleaning up an 'easy' handle in the `Curl_close()` function, the library code first frees a struct (without nulling the pointer) and might then subsequently erroneously write to a struct field within that already freed struct.(CVE-2018-16840)

Curl versions 7.33.0 through 7.61.1 are vulnerable to a buffer overrun in the SASL authentication code that may lead to denial of service.(CVE-2018-16839)

This update for curl fixes the following issues :

Security issues fixed :

  - CVE-2019-3823: Fixed a heap out-of-bounds read in the     code handling the end-of-response for SMTP     (bsc#1123378).

  - CVE-2019-3822: Fixed a stack based buffer overflow in     the function creating an outgoing NTLM type-3 message     (bsc#1123377).

  - CVE-2018-16890: Fixed a heap buffer out-of-bounds read     in the function handling incoming NTLM type-2 messages     (bsc#1123371).

This update was imported from the SUSE:SLE-15:Update update project.

This update for curl fixes the following issues :

Security issues fixed :

  - CVE-2019-3823: Fixed a heap out-of-bounds read in the     code handling the end-of-response for SMTP     (bsc#1123378).

  - CVE-2019-3822: Fixed a stack based buffer overflow in     the function creating an outgoing NTLM type-3 message     (bsc#1123377).

  - CVE-2018-16890: Fixed a heap buffer out-of-bounds read     in the function handling incoming NTLM type-2 messages     (bsc#1123371).

This update was imported from the SUSE:SLE-12:Update update project.

This update for curl fixes the following issues :

Security issues fixed :

CVE-2019-3822: Fixed a NTLMv2 type-3 header stack-based buffer overflow (bsc#1123377).

CVE-2019-3823: Fixed an out-of-bounds read in the SMTP end-of-response (bsc#1123378).

CVE-2018-16890: Fixed an out-of-bounds buffer read in NTLM type2 (bsc#1123371).

CVE-2018-16842: Fixed an out-of-bounds read in tool_msgs.c (bsc#1113660).

CVE-2018-16840: Fixed a use-after-free in handle close (bsc#1113029).

CVE-2018-16839: Fixed an SASL password overflow caused by an integer overflow (bsc#1112758).

Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

- fix SMTP end-of-response out-of-bounds read     (CVE-2019-3823)

  - fix NTLMv2 type-3 header stack-based buffer overflow     (CVE-2019-3822)

  - fix NTLM type-2 out-of-bounds buffer read     (CVE-2018-16890)

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website.
Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

curl security problems :

CVE-2018-16890: NTLM type-2 out-of-bounds buffer read

libcurl contains a heap buffer out-of-bounds read flaw.

The function handling incoming NTLM type-2 messages (lib/vauth/ntlm.c:ntlm_decode_type2_target) does not validate incoming data correctly and is subject to an integer overflow vulnerability.

Using that overflow, a malicious or broken NTLM server could trick libcurl to accept a bad length + offset combination that would lead to a buffer read out-of-bounds.

CVE-2019-3822: NTLMv2 type-3 header stack-based buffer overflow

libcurl contains a stack based buffer overflow vulnerability.

The function creating an outgoing NTLM type-3 header (lib/vauth/ntlm.c:Curl_auth_create_ntlm_type3_message()), generates the request HTTP header contents based on previously received data.
The check that exists to prevent the local buffer from getting overflowed is implemented wrongly (using unsigned math) and as such it does not prevent the overflow from happening.

This output data can grow larger than the local buffer if very large 'nt response' data is extracted from a previous NTLMv2 header provided by the malicious or broken HTTP server.

Such a 'large value' needs to be around 1000 bytes or more. The actual payload data copied to the target buffer comes from the NTLMv2 type-2 response header.

CVE-2019-3823: SMTP end-of-response out-of-bounds read

libcurl contains a heap out-of-bounds read in the code handling the end-of-response for SMTP.

If the buffer passed to smtp_endofresp() isn't NUL terminated and contains no character ending the parsed number, and len is set to 5, then the strtol() call reads beyond the allocated buffer. The read contents will not be returned to the caller.

Wenxiang Qian discovered that curl incorrectly handled certain NTLM authentication messages. A remote attacker could possibly use this issue to cause curl to crash, resulting in a denial of service. This issue only applied to Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, and Ubuntu 18.10. (CVE-2018-16890)

Wenxiang Qian discovered that curl incorrectly handled certain NTLMv2 authentication messages. A remote attacker could use this issue to cause curl to crash, resulting in a denial of service, or possibly execute arbitrary code. This issue only applied to Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, and Ubuntu 18.10. (CVE-2019-3822)

Brian Carpenter discovered that curl incorrectly handled certain SMTP responses. A remote attacker could possibly use this issue to cause curl to crash, resulting in a denial of service. (CVE-2019-3823).

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

This update for curl fixes the following issues :

Security issues fixed :

CVE-2019-3823: Fixed a heap out-of-bounds read in the code handling the end-of-response for SMTP (bsc#1123378).

CVE-2019-3822: Fixed a stack-based buffer overflow in the function creating an outgoing NTLM type-3 message (bsc#1123377).

CVE-2018-16890: Fixed a heap buffer out-of-bounds read in the function handling incoming NTLM type-2 messages (bsc#1123371).

Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

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

Multiple vulnerabilities were discovered in cURL, an URL transfer library.

  - CVE-2018-16890     Wenxiang Qian of Tencent Blade Team discovered that the     function handling incoming NTLM type-2 messages does not     validate incoming data correctly and is subject to an     integer overflow vulnerability, which could lead to an     out-of-bounds buffer read.

  - CVE-2019-3822     Wenxiang Qian of Tencent Blade Team discovered that the     function creating an outgoing NTLM type-3 header is     subject to an integer overflow vulnerability, which     could lead to an out-of-bounds write.

  - CVE-2019-3823     Brian Carpenter of Geeknik Labs discovered that the code     handling the end-of-response for SMTP is subject to an     out-of-bounds heap read.

ID	Name	Product	Family	Severity
180742	Oracle Linux 8 : curl (ELSA-2019-3701)	Nessus	Oracle Linux Local Security Checks	critical
145603	CentOS 8 : curl (CESA-2019:3701)	Nessus	CentOS Local Security Checks	critical
133296	Photon OS 1.0: Curl PHSA-2019-1.0-0209	Nessus	PhotonOS Local Security Checks	critical
130568	RHEL 8 : curl (RHSA-2019:3701)	Nessus	Red Hat Local Security Checks	critical
129567	Amazon Linux AMI : mysql57 (ALAS-2019-1297)	Nessus	Amazon Linux Local Security Checks	critical
126928	FreeBSD : MySQL -- Multiple vulerabilities (198e6220-ac8b-11e9-a1c7-b499baebfeaf)	Nessus	FreeBSD Local Security Checks	critical
126783	MySQL 5.7.x < 5.7.27 Multiple Vulnerabilities (Jul 2019 CPU)	Nessus	Databases	critical
126777	Oracle Enterprise Manager Ops Center (Jul 2019 CPU)	Nessus	Misc.	critical
124160	MySQL 8.0.x < 8.0.16 Multiple Vulnerabilities (Apr 2019 CPU) (Jul 2019 CPU)	Nessus	Databases	critical
124156	Oracle Fusion Middleware Oracle HTTP Server (Apr 2019 CPU)	Nessus	Web Servers	critical
122731	GLSA-201903-03 : cURL: Multiple vulnerabilities	Nessus	Gentoo Local Security Checks	critical
122260	Amazon Linux 2 : curl (ALAS-2019-1162)	Nessus	Amazon Linux Local Security Checks	critical
122221	openSUSE Security Update : curl (openSUSE-2019-174)	Nessus	SuSE Local Security Checks	critical
122220	openSUSE Security Update : curl (openSUSE-2019-173)	Nessus	SuSE Local Security Checks	critical
122149	SUSE SLED12 / SLES12 Security Update : curl (SUSE-SU-2019:0339-1)	Nessus	SuSE Local Security Checks	critical
122106	Fedora 29 : curl (2019-43489941ff)	Nessus	Fedora Local Security Checks	critical
122042	FreeBSD : curl -- multiple vulnerabilities (714b033a-2b09-11e9-8bc3-610fd6e6cd05)	Nessus	FreeBSD Local Security Checks	critical
121639	Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS : curl vulnerabilities (USN-3882-1)	Nessus	Ubuntu Local Security Checks	critical
121635	SUSE SLED12 / SLES12 Security Update : curl (SUSE-SU-2019:0249-1)	Nessus	SuSE Local Security Checks	critical
121632	Slackware 14.0 / 14.1 / 14.2 / current : curl (SSA:2019-037-01)	Nessus	Slackware Local Security Checks	critical
121628	Debian DSA-4386-1 : curl - security update	Nessus	Debian Local Security Checks	critical
121618	SUSE SLED15 / SLES15 Security Update : curl (SUSE-SU-2019:0248-1)	Nessus	SuSE Local Security Checks	critical

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CVE-2019-3822

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