Bug 1899467 (CVE-2020-13987) - CVE-2020-13987 Open-iSCSI: OOB read in checksum calculation in uIP
Summary: CVE-2020-13987 Open-iSCSI: OOB read in checksum calculation in uIP
Alias: CVE-2020-13987
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
Depends On: 1899974 1899977 1909046 1910572
Blocks: 1881303
TreeView+ depends on / blocked
Reported: 2020-11-19 10:35 UTC by Cedric Buissart
Modified: 2022-04-17 21:03 UTC (History)
7 users (show)

Fixed In Version:
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Last Closed: 2021-10-29 06:55:07 UTC

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Description Cedric Buissart 2020-11-19 10:35:57 UTC
A out of bound read was found in uIP (Micro IP) TCP/UDP checksum calculation in IPv4

The function that parses incoming transport layer packets (TCP/UDP) does not check the length fields of packet headers against the data available in the packets. Given arbitrary lengths, an out-of-bounds memory read may be performed during the checksum computation.

listed potential impact: DoS & information leak

Comment 3 Cedric Buissart 2020-12-10 13:59:00 UTC
In Red Hat Enterprise Linux, uIP is used in the iscsiuio command, provided by iscsi-initiator-utils.

In RHEL, the command is used for connecting to an iSCSI NAS. It is expected that the attacker is a Person in the Middle, between the NAS and the RHEL machine.
As a consequence, this issue is currently rated Low.

Comment 4 Cedric Buissart 2020-12-18 09:08:32 UTC
Created iscsi-initiator-utils tracking bugs for this issue:

Affects: fedora-all [bug 1909046]

Comment 9 Cedric Buissart 2021-02-25 17:33:37 UTC

Although a vulnerable version of uIP is included in iscsi-initiator-utils, it is believed that the vulnerability can not be actively exploited in that particular context.

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