CVE-2018-1000005 Detail
Modified
This vulnerability has been modified since it was last analyzed by the NVD. It is awaiting reanalysis which may result in further changes to the information provided.
Current Description
libcurl 7.49.0 to and including 7.57.0 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.
Source:
MITRE
Description Last Modified:
01/24/2018
View Analysis Description
Analysis Description
libcurl 7.49.0 to and including 7.57.0 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.
Source:
MITRE
Description Last Modified:
01/24/2018
Impact
CVSS v3.0 Severity and Metrics:
Base Score:
9.1 CRITICAL
Vector:
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
(V3 legend)
Impact Score:
5.2
Exploitability Score:
3.9
Attack Vector (AV):
Network
Attack Complexity (AC):
Low
Privileges Required (PR):
None
User Interaction (UI):
None
Scope (S):
Unchanged
Confidentiality (C):
High
Integrity (I):
None
Availability (A):
High
CVSS v2.0 Severity and Metrics:
Base Score:
6.4 MEDIUM
Vector:
(AV:N/AC:L/Au:N/C:P/I:N/A:P)
(V2 legend)
Impact Subscore:
4.9
Exploitability Subscore:
10.0
Access Vector (AV):
Network
Access Complexity (AC):
Low
Authentication (AU):
None
Confidentiality (C):
Partial
Integrity (I):
None
Availability (A):
Partial
Additional Information:
Allows unauthorized disclosure of information
Allows disruption of service
References to Advisories, Solutions, and Tools
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Change History
4 change records found
- show changes
CVE Modified by MITRE -
3/20/2018 9:29:01 PM
| Action |
Type |
Old Value |
New Value |
| Added |
Reference |
|
https://usn.ubuntu.com/3554-1/ [No Types Assigned] |
Initial Analysis -
2/9/2018 3:17:56 PM
| Action |
Type |
Old Value |
New Value |
| Added |
CPE Configuration |
|
OR
*cpe:2.3:a:haxx:libcurl:*:*:*:*:*:*:*:* versions from (including) 7.49.0 up to (including) 7.57.0 |
| Added |
CPE Configuration |
|
OR
*cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
*cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* |
| Added |
CVSS V2 |
|
(AV:N/AC:L/Au:N/C:P/I:N/A:P) |
| Added |
CVSS V3 |
|
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H |
| Added |
CWE |
|
CWE-125 |
| Changed |
Reference Type |
http://www.securitytracker.com/id/1040273 No Types Assigned |
http://www.securitytracker.com/id/1040273 Third Party Advisory, VDB Entry |
| Changed |
Reference Type |
https://curl.haxx.se/docs/adv_2018-824a.html No Types Assigned |
https://curl.haxx.se/docs/adv_2018-824a.html Patch, Vendor Advisory |
| Changed |
Reference Type |
https://github.com/curl/curl/pull/2231 No Types Assigned |
https://github.com/curl/curl/pull/2231 Issue Tracking, Patch, Third Party Advisory |
| Changed |
Reference Type |
https://www.debian.org/security/2018/dsa-4098 No Types Assigned |
https://www.debian.org/security/2018/dsa-4098 Third Party Advisory |
CVE Modified by MITRE -
1/27/2018 9:29:00 PM
| Action |
Type |
Old Value |
New Value |
| Added |
Reference |
|
https://www.debian.org/security/2018/dsa-4098 [No Types Assigned] |
CVE Modified by MITRE -
1/25/2018 9:29:03 PM
| Action |
Type |
Old Value |
New Value |
| Added |
Reference |
|
http://www.securitytracker.com/id/1040273 [No Types Assigned] |
Quick Info
CVE Dictionary Entry:
CVE-2018-1000005
NVD Published Date:
01/24/2018
NVD Last Modified:
03/20/2018
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