CVE-2019-19768: Use After Free
First published: Fri Nov 29 2019(Updated: )
A use-after-free flaw was found in the Linux kernels implementation of blktrace in the __blk_add_trace function. A local attacker with permissions to run block trace instructions against a device can create a situation where the core block_trace object is used after it is freed. The attacker can pre-groom memory to race this use-after-free to create a condition where memory is corrupted and also likely to be privilege escalation. The ability to create this condition requires elevated privileges, and it has been decided that this change in Red Hat Enterprise Linux 5 and 6 would risk introducing possible regressions and will not be backported. Reference: <a href="https://bugzilla.kernel.org/show_bug.cgi?id=205711">https://bugzilla.kernel.org/show_bug.cgi?id=205711</a> Patch: A patch may be attached to the bugzilla.kernel.org but no patch exists at this time.
Credit: cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/kernel-rt | <0:3.10.0-1127.8.2.rt56.1103.el7 | 0:3.10.0-1127.8.2.rt56.1103.el7 |
| redhat/kernel | <0:3.10.0-1127.8.2.el7 | 0:3.10.0-1127.8.2.el7 |
| redhat/kernel-alt | <0:4.14.0-115.21.2.el7a | 0:4.14.0-115.21.2.el7a |
| redhat/kernel | <0:3.10.0-327.88.1.el7 | 0:3.10.0-327.88.1.el7 |
| redhat/kernel | <0:3.10.0-514.76.1.el7 | 0:3.10.0-514.76.1.el7 |
| redhat/kernel | <0:3.10.0-693.67.1.el7 | 0:3.10.0-693.67.1.el7 |
| redhat/kernel | <0:3.10.0-957.54.1.el7 | 0:3.10.0-957.54.1.el7 |
| redhat/kernel | <0:3.10.0-1062.26.1.el7 | 0:3.10.0-1062.26.1.el7 |
| redhat/kernel-rt | <0:4.18.0-193.rt13.51.el8 | 0:4.18.0-193.rt13.51.el8 |
| redhat/kernel | <0:4.18.0-193.el8 | 0:4.18.0-193.el8 |
| redhat/kernel | <0:4.18.0-80.18.1.el8_0 | 0:4.18.0-80.18.1.el8_0 |
| redhat/kernel | <0:4.18.0-147.13.2.el8_1 | 0:4.18.0-147.13.2.el8_1 |
| redhat/kernel-rt | <1:3.10.0-693.67.1.rt56.665.el6 | 1:3.10.0-693.67.1.rt56.665.el6 |
| Linux Linux kernel | =5.4.0 | |
| Linux Linux kernel | =5.4.0-rc1 | |
| Linux Linux kernel | =5.4.0-rc2 | |
| debian/linux | 5.10.223-1 5.10.226-1 6.1.115-1 6.1.119-1 6.11.10-1 6.12.5-1 |
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Reference Links
- https://www.cve.org/CVERecord?id=CVE-2019-19768 https://nvd.nist.gov/vuln/detail/CVE-2019-19768
- https://bugzilla.redhat.com/show_bug.cgi?id=1786164
- https://access.redhat.com/errata/RHSA-2020:2085
- https://access.redhat.com/errata/RHSA-2020:2082
- https://access.redhat.com/errata/RHSA-2020:2104
- https://access.redhat.com/errata/RHSA-2020:2285
- https://access.redhat.com/errata/RHSA-2020:2277
- https://access.redhat.com/errata/RHSA-2020:2214
- https://access.redhat.com/errata/RHSA-2020:2289
- https://access.redhat.com/errata/RHSA-2020:2291
- https://access.redhat.com/errata/RHSA-2020:2519
- https://access.redhat.com/errata/RHSA-2020:2522
- https://access.redhat.com/errata/RHSA-2020:1567
- https://access.redhat.com/errata/RHSA-2020:1769
- https://access.redhat.com/errata/RHSA-2020:1966
- https://access.redhat.com/errata/RHSA-2020:2199
- https://access.redhat.com/errata/RHSA-2020:2203
- https://access.redhat.com/errata/RHSA-2020:2242
- https://access.redhat.com/security/cve/cve-2019-19768
- http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00039.html
- https://bugzilla.kernel.org/show_bug.cgi?id=205711
- https://lists.debian.org/debian-lts-announce/2020/06/msg00011.html
- https://lists.debian.org/debian-lts-announce/2020/06/msg00012.html
- https://lists.debian.org/debian-lts-announce/2020/06/msg00013.html
- https://security.netapp.com/advisory/ntap-20200103-0001/
- https://usn.ubuntu.com/4342-1/
- https://usn.ubuntu.com/4344-1/
- https://usn.ubuntu.com/4345-1/
- https://usn.ubuntu.com/4346-1/
- https://www.debian.org/security/2020/dsa-4698
- https://launchpad.net/bugs/cve/CVE-2019-19768
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1786166
- https://security-tracker.debian.org/tracker/CVE-2019-19768
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-19768
- https://nvd.nist.gov/vuln/detail/CVE-2019-19768
- https://ubuntu.com/security/CVE-2019-19768
Parent vulnerabilities
(Appears in the following advisories)
- collector/redhat-cve
- collector/nvd-index
- agent/type
- agent/first-publish-date
- collector/launchpad-cve
- source/Launchpad
- collector/redhat-bugzilla
- source/Red Hat
- alias/CVE-2019-19768
- agent/author
- agent/severity
- agent/remedy
- agent/weakness
- collector/mitre-cve
- source/MITRE
- agent/references
- agent/tags
- collector/usn-cve
- source/Ubuntu
- agent/description
- agent/event
- collector/nvd-cve
- source/NVD
- agent/software-canonical-lookup
- agent/last-modified-date
- collector/security-tracker-debian
- source/Debian
- agent/softwarecombine
- agent/trending
- package-manager/redhat
- vendor/linux
- canonical/linux linux kernel
- version/linux linux kernel/5.4.0
- version/linux linux kernel/5.4.0-rc1
- version/linux linux kernel/5.4.0-rc2
- package-manager/debian