Gentoo update for cURL



Risk High
Patch available YES
Number of vulnerabilities 6
CVE-ID CVE-2018-14618
CVE-2018-16839
CVE-2018-16840
CVE-2018-16842
CVE-2019-3822
CVE-2019-3823
CWE-ID CWE-120
CWE-190
CWE-416
CWE-122
CWE-121
CWE-125
Exploitation vector Network
Public exploit Public exploit code for vulnerability #5 is available.
Public exploit code for vulnerability #6 is available.
Vulnerable software
 Gentoo Linux
Operating systems & Components / Operating system

Vendor Gentoo

Security Bulletin

This security bulletin contains information about 6 vulnerabilities.

1) Buffer overflow

EUVDB-ID: #VU14691

Risk: High

CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2018-14618

CWE-ID: CWE-120 - Buffer overflow

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists on systems with a 32-bit size_t and that use more than 2 GB of memory for the password field due to a buffer overflow in Curl_ntlm_core_mk_nt_hash() in 'lib/curl_ntlm_core.c' when handling malicious input. A remote unauthenticated attacker can send a specially crafted NTLM authentication password, trigger memory corruption and execute arbitrary code with elevated privileges.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Update the affected packages.
net-misc/curl to version: 7.64.0

Vulnerable software versions

Gentoo Linux: All versions

CPE2.3 External links

https://security.gentoo.org/glsa/201903-03


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Integer overflow

EUVDB-ID: #VU15671

Risk: High

CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2018-16839

CWE-ID: CWE-190 - Integer overflow

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to integer overflow in processing the Curl_auth_create_plain_message name and password when handling malicious input. A remote unauthenticated attacker can send specially crafted SASL password data, trigger memory corruption and execute arbitrary code with elevated privileges. The affected function can be invoked using POP3(S), IMAP(S), or SMTP(S).

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Update the affected packages.
net-misc/curl to version: 7.64.0

Vulnerable software versions

Gentoo Linux: All versions

CPE2.3 External links

https://security.gentoo.org/glsa/201903-03


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

3) Use-after-free error

EUVDB-ID: #VU15672

Risk: Low

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2018-16840

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows a remote attacker to cause DoS condition on the target system.

The vulnerability exists due to use-after-free error in closing an easy handle in the 'Curl_close()' function. A remote unauthenticated attacker can specially crafted data, trigger memory corruption and cause the service to crash.

Mitigation

Update the affected packages.
net-misc/curl to version: 7.64.0

Vulnerable software versions

Gentoo Linux: All versions

CPE2.3 External links

https://security.gentoo.org/glsa/201903-03


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

4) Heap-based buffer overflow

EUVDB-ID: #VU15673

Risk: Low

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2018-16842

CWE-ID: CWE-122 - Heap-based Buffer Overflow

Exploit availability: No

Description

The vulnerability allows a remote attacker to cause DoS condition on the target system.

The vulnerability exists due to heap-based buffer over-read in the tool_msgs.c:voutf() function. A remote unauthenticated attacker can specially crafted data, trigger memory corruption to read back out-of-buffer data and cause the service to crash.

Mitigation

Update the affected packages.
net-misc/curl to version: 7.64.0

Vulnerable software versions

Gentoo Linux: All versions

CPE2.3 External links

https://security.gentoo.org/glsa/201903-03


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

5) Stack-based buffer overflow

EUVDB-ID: #VU17456

Risk: High

CVSSv4.0: 8.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Amber]

CVE-ID: CVE-2019-3822

CWE-ID: CWE-121 - Stack-based buffer overflow

Exploit availability: No

Description

The vulnerability allows a remote attacker to cause DoS condition or execute arbitrary code on the target system.

The vulnerability exists due to the NT LAN Manager (NTLM) Curl_auth_create_ntlm_type3_message function creates an outgoing NTLM type-3 header and generates the request HTTP header contents based on previously received data. A remote unauthenticated attacker can send very large ‘nt response’ output data, that has been extracted from a previous NTLMv2 header that was provided by a malicious or broken HTTP server, trigger stack-based buffer overflow and cause the service to crash or execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Update the affected packages.
net-misc/curl to version: 7.64.0

Vulnerable software versions

Gentoo Linux: All versions

CPE2.3 External links

https://security.gentoo.org/glsa/201903-03


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.

6) Heap out-of-bounds read

EUVDB-ID: #VU17458

Risk: Low

CVSSv4.0: 5.5 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/U:Clear]

CVE-ID: CVE-2019-3823

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information or cause the service to crash.

The vulnerability exists due 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. A remote attacker can trigger heap out-of-bounds read error and read contents of memory on the system or cause the service to crash..

Mitigation

Update the affected packages.
net-misc/curl to version: 7.64.0

Vulnerable software versions

Gentoo Linux: All versions

CPE2.3 External links

https://security.gentoo.org/glsa/201903-03


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.



###SIDEBAR###