CVE-2020-17437

The Open-iSCSI project is a high-performance, transport independent, multi-platform implementation of RFC3720 iSCSI.

Security Fix(es):

An issue was discovered in uIP 1.0, as used in Contiki 3.0 and other products. When the Urgent flag is set in a TCP packet, and the stack is configured to ignore the urgent data, the stack attempts to use the value of the Urgent pointer bytes to separate the Urgent data from the normal data, by calculating the offset at which the normal data should be present in the global buffer. However, the length of this offset is not checked; therefore, for large values of the Urgent pointer bytes, the data pointer can point to memory that is way beyond the data buffer in uip_process in uip.c.(CVE-2020-17437)

An issue was discovered in uIP 1.0, as used in Contiki 3.0 and other products. When the Urgent flag is set in a TCP packet, and the stack is configured to ignore the urgent data, the stack attempts to use the value of the Urgent pointer bytes to separate the Urgent data from the normal data, by calculating the offset at which the normal data should be present in the global buffer. However, the length of this offset is not checked; therefore, for large values of the Urgent pointer bytes, the data pointer can point to memory that is way beyond the data buffer in uip_process in uip.c.

These are all security issues fixed in the iscsiuio-0.7.8.6-80.2 package on the GA media of openSUSE Tumbleweed.

This update for open-iscsi fixes the following issues:

• Enabled asynchronous logins for iscsi.service (bsc#1183421)
• Fixed a login issue when target is delayed

This update for open-iscsi fixes the following issues:

Fixes for CVE-2019-17437, CVE-2020-17438, CVE-2020-13987 and CVE-2020-13988 (bsc#1179908):

• check for TCP urgent pointer past end of frame
• check for u8 overflow when processing TCP options
• check for header length underflow during checksum calculation

This update for open-iscsi fixes the following issues:

• CVE-2020-17437: uIP Out-of-Bounds Write (bsc#1179908)
• CVE-2020-17438: uIP Out-of-Bounds Write (bsc#1179908)
• CVE-2020-13987: uIP Out-of-Bounds Read (bsc#1179908)
• CVE-2020-13988: uIP Integer Overflow (bsc#1179908)
• Enabled no-wait ('-W') iscsiadm option for iscsi login service (bsc#1173886, bsc#1183421)
• Added the ability to perform async logins (bsc#1173886)

This update for open-iscsi fixes the following issues:

Fixed various vulnerabilities in the embedded TCP/IP stack (bsc#1179908):

• CVE-2020-13987: Fixed an out of bounds memory access when calculating the checksums for IP packets.
• CVE-2020-13988: Fixed an integer overflow when parsing TCP MSS options of IPv4 network packets.
• CVE-2020-17437: Fixed an out of bounds memory access when the TCP urgent flag is set.

This update for open-iscsi fixes the following issues:

• CVE-2020-17437: Fixed an out of bounds memory access when the TCP urgent flag is set. (bsc#1179908).

Non-security fixes:

• Fix an issue with ARP booting when using different subnets (bsc#1058463).
• Allow target discovery using 'db' mode (bsc#1109477).

Jos Wetzels, Stanislav Dashevskyi, and Amine Amri discovered that Open-iSCSI incorrectly handled certain checksums for IP packets. An attacker could possibly use this issue to expose sensitive information. (CVE-2020-13987)

Jos Wetzels, Stanislav Dashevskyi, Amine Amri discovered that Open-iSCSI incorrectly handled certain parsing TCP MSS options. An attacker could possibly use this issue to cause a crash or cause unexpected behavior. (CVE-2020-13988)

Amine Amri and Stanislav Dashevskyi discovered that Open-iSCSI incorrectly handled certain TCP data. An attacker could possibly use this issue to expose sensitive information. (CVE-2020-17437)