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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
6.4 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:N/A:P
0.007 Low
EPSS
Percentile
79.2%
Issue Overview:
Out-of-bounds read in code handling HTTP/2 trailers:
libcurl contains an out bounds read in code handling HTTP/2 trailers. It was reported (https://github.com/curl/curl/pull/2231) that reading an HTTP/2 trailer could mess up future trailers since the stored size was one byte less than required. The problem is that the code that creates HTTP/1-like headers from the HTTP/2 trailer data once appended a string like :
to the target buffer, while this was recently changed to :
(a space was added after the colon) but the following math wasn’t updated correspondingly. When accessed, the data is read out of bounds and causes either a crash or that the (too large) data gets passed to client write. This could lead to a denial-of-service situation or an information disclosure if someone has a service that echoes back or uses the trailers for something. (CVE-2018-1000005)
HTTP authentication leak in redirects:
libcurl might accidentally leak authentication data to third parties. When asked to send custom headers in its HTTP requests, libcurl will send that set of headers first to the host in the initial URL but also, if asked to follow redirects and a 30X HTTP response code is returned, to the host mentioned in URL in the Location:
response header value. Sending the same set of headers to subsequest hosts is in particular a problem for applications that pass on custom Authorization:
headers, as this header often contains privacy sensitive information or data that could allow others to impersonate the libcurl-using client’s request. (CVE-2018-1000007)
Affected Packages:
curl
Issue Correction:
Run yum update curl to update your system.
New Packages:
i686:
libcurl-devel-7.53.1-14.81.amzn1.i686
libcurl-7.53.1-14.81.amzn1.i686
curl-debuginfo-7.53.1-14.81.amzn1.i686
curl-7.53.1-14.81.amzn1.i686
src:
curl-7.53.1-14.81.amzn1.src
x86_64:
curl-7.53.1-14.81.amzn1.x86_64
curl-debuginfo-7.53.1-14.81.amzn1.x86_64
libcurl-7.53.1-14.81.amzn1.x86_64
libcurl-devel-7.53.1-14.81.amzn1.x86_64
Red Hat: CVE-2018-1000005, CVE-2018-1000007
Mitre: CVE-2018-1000005, CVE-2018-1000007
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
Amazon Linux | 1 | i686 | libcurl-devel | < 7.53.1-14.81.amzn1 | libcurl-devel-7.53.1-14.81.amzn1.i686.rpm |
Amazon Linux | 1 | i686 | libcurl | < 7.53.1-14.81.amzn1 | libcurl-7.53.1-14.81.amzn1.i686.rpm |
Amazon Linux | 1 | i686 | curl-debuginfo | < 7.53.1-14.81.amzn1 | curl-debuginfo-7.53.1-14.81.amzn1.i686.rpm |
Amazon Linux | 1 | i686 | curl | < 7.53.1-14.81.amzn1 | curl-7.53.1-14.81.amzn1.i686.rpm |
Amazon Linux | 1 | x86_64 | curl | < 7.53.1-14.81.amzn1 | curl-7.53.1-14.81.amzn1.x86_64.rpm |
Amazon Linux | 1 | x86_64 | curl-debuginfo | < 7.53.1-14.81.amzn1 | curl-debuginfo-7.53.1-14.81.amzn1.x86_64.rpm |
Amazon Linux | 1 | x86_64 | libcurl | < 7.53.1-14.81.amzn1 | libcurl-7.53.1-14.81.amzn1.x86_64.rpm |
Amazon Linux | 1 | x86_64 | libcurl-devel | < 7.53.1-14.81.amzn1 | libcurl-devel-7.53.1-14.81.amzn1.x86_64.rpm |
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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
6.4 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:N/A:P
0.007 Low
EPSS
Percentile
79.2%