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amazonAmazonALAS-2019-1151
HistoryFeb 07, 2019 - 4:24 a.m.

Medium: curl

2019-02-0704:24:00
alas.aws.amazon.com
210

9.8 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

7.5 High

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:N/AC:L/Au:N/C:P/I:P/A:P

0.013 Low

EPSS

Percentile

85.7%

Issue Overview:

set_file_metadata in xattr.c in GNU Wget 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 heap-based buffer overflow has been found in the Curl_smtp_escape_eob() function of curl. An attacker could exploit this by convincing a user to use curl to upload data over SMTP with a reduced buffer to cause a crash or corrupt memory.(CVE-2018-0500)

Affected Packages:

curl

Issue Correction:
Run yum update curl to update your system.

New Packages:

i686:  
    curl-7.61.1-7.91.amzn1.i686  
    libcurl-devel-7.61.1-7.91.amzn1.i686  
    libcurl-7.61.1-7.91.amzn1.i686  
    curl-debuginfo-7.61.1-7.91.amzn1.i686  
  
src:  
    curl-7.61.1-7.91.amzn1.src  
  
x86_64:  
    libcurl-devel-7.61.1-7.91.amzn1.x86_64  
    libcurl-7.61.1-7.91.amzn1.x86_64  
    curl-debuginfo-7.61.1-7.91.amzn1.x86_64  
    curl-7.61.1-7.91.amzn1.x86_64  

Additional References

Red Hat: CVE-2018-0500, CVE-2018-20483

Mitre: CVE-2018-0500, CVE-2018-20483

9.8 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

7.5 High

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:N/AC:L/Au:N/C:P/I:P/A:P

0.013 Low

EPSS

Percentile

85.7%