Detections
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Alpine: multiple curl packages, libcurl: security update to 7.54.1-r0 (deprecated)
medium Tenable Cloud Security Plugin ID 400850
Description
There are packages installed that are affected by multiple vulnerabilities referenced in the following CVEs:- When asking to get a file from a file:// URL, libcurl provides a feature that outputs meta-data about the
file using HTTP-like headers. The code doing this would send the wrong buffer to the user (stdout or the
application's provide callback), which could lead to other private data from the heap to get inadvertently
displayed. The wrong buffer was an uninitialized memory area allocated on the heap and if it turned out to
not contain any zero byte, it would continue and display the data following that buffer in memory.
(CVE-2017-1000099)
- When doing a TFTP transfer and curl/libcurl is given a URL that contains a very long file name (longer
than about 515 bytes), the file name is truncated to fit within the buffer boundaries, but the buffer size
is still wrongly updated to use the untruncated length. This too large value is then used in the sendto()
call, making curl attempt to send more data than what is actually put into the buffer. The endto()
function will then read beyond the end of the heap based buffer. A malicious HTTP(S) server could redirect
a vulnerable libcurl-using client to a crafted TFTP URL (if the client hasn't restricted which protocols
it allows redirects to) and trick it to send private memory contents to a remote server over UDP. Limit
curl's redirect protocols with --proto-redir and libcurl's with CURLOPT_REDIR_PROTOCOLS.
(CVE-2017-1000100)
- curl supports "globbing" of URLs, in which a user can pass a numerical range to have the tool iterate over
those numbers to do a sequence of transfers. In the globbing function that parses the numerical range,
there was an omission that made curl read a byte beyond the end of the URL if given a carefully crafted,
or just wrongly written, URL. The URL is stored in a heap based buffer, so it could then be made to
wrongly read something else instead of crashing. An example of a URL that triggers the flaw would be
`http://ur%20[0-60000000000000000000`. (CVE-2017-1000101)
See Also
https://git.alpinelinux.org/aports/commit/?id=13ee88b017ecd8c894a60178235598a526d5e4a6
https://git.alpinelinux.org/aports/commit/?id=c41812134d11c0ab6c6f0258de05de85638d996b
Plugin Details
Severity: Medium
ID: 400850
Version: Revision 1.22
Type: Local
Published: 8/16/2023
Updated: 1/17/2024
Supported Sensors: Agentless Assessment, Tenable Cloud Security, Tenable Self-Hosted Container Security
Risk Information
VPR
Risk Factor: Low
Score: 3.6
CVSS v2
Risk Factor: Medium
Base Score: 4.3
Temporal Score: 3.2
Vector: CVSS2#AV:N/AC:M/Au:N/C:P/I:N/A:N
CVSS Score Source: CVE-2017-1000101
CVSS v3
Risk Factor: Medium
Base Score: 6.5
Temporal Score: 5.7
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C
Vulnerability Information
Exploit Ease: No known exploits are available
Patch Publication Date: 8/11/2017
Vulnerability Publication Date: 8/9/2017