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CVE-2019-15239
CVE information
Published
Last Modified
CVSSv2.0 Severity
CVSSv3.1 Severity
Impact Analysis
Description
In the Linux kernel, a certain net/ipv4/tcp_output.c change, which was properly incorporated into 4.16.12, was incorrectly backported to the earlier longterm kernels, introducing a new vulnerability that was potentially more severe than the issue that was intended to be fixed by backporting. Specifically, by adding to a write queue between disconnection and re-connection, a local attacker can trigger multiple use-after-free conditions. This can result in a kernel crash, or potentially in privilege escalation. NOTE: this affects (for example) Linux distributions that use 4.9.x longterm kernels before 4.9.190 or 4.14.x longterm kernels before 4.14.139..
CVSSv2.0 Score
- Severity
- High
- Base Score
- 7.2/10
- Exploit Score
- 3.9/10
- Access Vector
- Local
- Access Complexity
- Low
- Authentication Required
- None
- Impact Score
- 10/10
- Confidentiality Impact
- Complete
- Availability Impact
- Complete
- Integrity Impact
- Complete
CVSSv3.1 Score
- Severity
- High
- Base Score
- 7.8/10
- Exploit Score
- 1.8/10
- Access Vector
- Local
- Access Complexity
- Low
- Privileges Required
- Low
- Impact Score
- 5.9/10
- Confidentiality Impact
- High
- Availability Impact
- High
- Integrity Impact
- High
- Scope
- Unchanged
- User Interaction
- None
Products Affected
CPE | Affected | Vulnerable | Excluding | Edit |
---|---|---|---|---|
cpe:2.3:o:linux:linux_kernel:4.16.12:*:*:*:*:*:*:* |
Yes
|
- | - | |
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* |
Yes
|
- | - | |
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* |
Yes
|
- | - |
References
- https://pulsesecurity.co.nz/advisories/linux-kernel-4.9-tcpsocketsuaf
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=7f582b248d
- https://www.debian.org/security/2019/dsa-4497
- https://salsa.debian.org/kernel-team/kernel-sec/blob/f6273af2d956a87296b6b60379d0a186c9b
- http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00064.html
- http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00066.html
- https://access.redhat.com/errata/RHSA-2019:3978
- https://access.redhat.com/errata/RHSA-2019:3979
- https://access.redhat.com/errata/RHSA-2020:0027
- https://lore.kernel.org/stable/41a61a2f87691d2bc839f26cdfe6f5ff2f51e472.camel%40decadent