Amazon Linux AMI update for curl



Risk High
Patch available YES
Number of vulnerabilities 3
CVE-ID CVE-2018-1000121
CVE-2018-1000120
CVE-2018-1000122
CWE-ID CWE-476
CWE-122
CWE-126
Exploitation vector Network
Public exploit N/A
Vulnerable software
 Amazon Linux AMI
Operating systems & Components / Operating system

Vendor Amazon Web Services

Security Bulletin

This security bulletin contains information about 3 vulnerabilities.

1) Null pointer dereference

EUVDB-ID: #VU11105

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-2018-1000121

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: No

Description

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

The weakness exists due to NULL pointer dereference in ldap_get_attribute_ber(). A remote attacker can return a specially crafted redirect to an LDAP URL, trigger NULL pointer dereference and cause the service to crash.//

Mitigation

Update the affected packages.

i686:
    curl-debuginfo-7.53.1-16.84.amzn1.i686
    curl-7.53.1-16.84.amzn1.i686
    libcurl-7.53.1-16.84.amzn1.i686
    libcurl-devel-7.53.1-16.84.amzn1.i686

src:
    curl-7.53.1-16.84.amzn1.src

x86_64:
    libcurl-devel-7.53.1-16.84.amzn1.x86_64
    curl-debuginfo-7.53.1-16.84.amzn1.x86_64
    curl-7.53.1-16.84.amzn1.x86_64
    libcurl-7.53.1-16.84.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

CPE2.3 External links

https://alas.aws.amazon.com/ALAS-2018-995.html


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) Heap-based buffer overflow

EUVDB-ID: #VU11111

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-2018-1000120

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

Exploit availability: No

Description

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

The weakness exists due to heap-based buffer overflow. A remote attacker that can control the paths that curl uses for FTP can create specially crafted path names containing the control characters '%00', trigger memory corruption and execute arbitrary code.


Mitigation

Update the affected packages.

i686:
    curl-debuginfo-7.53.1-16.84.amzn1.i686
    curl-7.53.1-16.84.amzn1.i686
    libcurl-7.53.1-16.84.amzn1.i686
    libcurl-devel-7.53.1-16.84.amzn1.i686

src:
    curl-7.53.1-16.84.amzn1.src

x86_64:
    libcurl-devel-7.53.1-16.84.amzn1.x86_64
    curl-debuginfo-7.53.1-16.84.amzn1.x86_64
    curl-7.53.1-16.84.amzn1.x86_64
    libcurl-7.53.1-16.84.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

CPE2.3 External links

https://alas.aws.amazon.com/ALAS-2018-995.html


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) Buffer over-read

EUVDB-ID: #VU11108

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-2018-1000122

CWE-ID: CWE-126 - Buffer over-read

Exploit availability: No

Description

The vulnerability allows a remote attacker to obtain potentially sensitive information or cause DoS condition.

The weakness exists due to buffer over-read. A remote attacker can cause the target application to trigger a buffer copy error in processing RTSP URLs and cause the application to crash or access potentially sensitive information on the target system.

Mitigation

Update the affected packages.

i686:
    curl-debuginfo-7.53.1-16.84.amzn1.i686
    curl-7.53.1-16.84.amzn1.i686
    libcurl-7.53.1-16.84.amzn1.i686
    libcurl-devel-7.53.1-16.84.amzn1.i686

src:
    curl-7.53.1-16.84.amzn1.src

x86_64:
    libcurl-devel-7.53.1-16.84.amzn1.x86_64
    curl-debuginfo-7.53.1-16.84.amzn1.x86_64
    curl-7.53.1-16.84.amzn1.x86_64
    libcurl-7.53.1-16.84.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

CPE2.3 External links

https://alas.aws.amazon.com/ALAS-2018-995.html


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.



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