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CVE-2019-11482

Status Candidate

Overview

Sander Bos discovered a time of check to time of use (TOCTTOU) vulnerability in apport that allowed a user to cause core files to be written in arbitrary directories.

Related Files

Ubuntu Security Notice USN-4171-6
Posted Nov 12, 2020
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4171-6 - USN-4171-1 fixed vulnerabilities in Apport. The update caused a regression when handling configuration files. This update fixes the problem, and also introduces further hardening measures. Kevin Backhouse discovered Apport would read its user-controlled settings file as the root user. This could be used by a local attacker to possibly crash Apport or have other unspecified consequences. Sander Bos discovered a race-condition in Apport during core dump creation. This could be used by a local attacker to generate a crash report for a privileged process that is readable by an unprivileged user. Sander Bos discovered Apport mishandled crash dumps originating from containers. This could be used by a local attacker to generate a crash report for a privileged process that is readable by an unprivileged user. Sander Bos discovered Apport mishandled lock-file creation. This could be used by a local attacker to cause a denial of service against Apport. Kevin Backhouse discovered Apport read various process-specific files with elevated privileges during crash dump generation. This could could be used by a local attacker to generate a crash report for a privileged process that is readable by an unprivileged user. Various other issues were also addressed.

tags | advisory, denial of service, local, root, vulnerability
systems | linux, ubuntu
advisories | CVE-2019-11481, CVE-2019-11482, CVE-2019-11483, CVE-2019-11485, CVE-2019-15790
SHA-256 | fb76d84438640d2aad14467c1806547c171cdec6f006c98985e84b48f76a30ee
Ubuntu Security Notice USN-4171-5
Posted Mar 18, 2020
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4171-5 - USN-4171-1 fixed vulnerabilities in Apport. This caused a regression in autopkgtest and python2 compatibility. This update fixes the problem. Kevin Backhouse discovered Apport would read its user-controlled settings file as the root user. This could be used by a local attacker to possibly crash Apport or have other unspecified consequences. Sander Bos discovered a race-condition in Apport during core dump creation. This could be used by a local attacker to generate a crash report for a privileged process that is readable by an unprivileged user. Sander Bos discovered Apport mishandled crash dumps originating from containers. This could be used by a local attacker to generate a crash report for a privileged process that is readable by an unprivileged user. Sander Bos discovered Apport mishandled lock-file creation. This could be used by a local attacker to cause a denial of service against Apport. Kevin Backhouse discovered Apport read various process-specific files with elevated privileges during crash dump generation. This could could be used by a local attacker to generate a crash report for a privileged process that is readable by an unprivileged user. Various other issues were also addressed.

tags | advisory, denial of service, local, root, vulnerability
systems | linux, ubuntu
advisories | CVE-2019-11481, CVE-2019-11482, CVE-2019-11483, CVE-2019-11485, CVE-2019-15790
SHA-256 | 75bef91aa3e4884192cffeb9817cb1afc24784b2d7d29e5bed569257728aa0f2
Ubuntu Security Notice USN-4171-4
Posted Nov 5, 2019
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4171-4 - USN-4171-2 fixed a vulnerability in Apport. The update caused a regression in the Python Apport library. This update fixes the problem for Ubuntu 14.04 ESM. Kevin Backhouse discovered Apport would read its user-controlled settings file as the root user. This could be used by a local attacker to possibly crash Apport or have other unspecified consequences. Various other issues were also addressed.

tags | advisory, local, root, python
systems | linux, ubuntu
advisories | CVE-2019-11481, CVE-2019-11482, CVE-2019-11483, CVE-2019-11485, CVE-2019-15790
SHA-256 | 81caad2d46344b540abb520d2403bf96350e49f383817970934e6e91fd5bd73f
Ubuntu Security Notice USN-4171-3
Posted Nov 5, 2019
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4171-3 - USN-4171-1 fixed vulnerabilities in Apport. The update caused a regression in the Python Apport library. This update fixes the problem. Kevin Backhouse discovered Apport would read its user-controlled settings file as the root user. This could be used by a local attacker to possibly crash Apport or have other unspecified consequences. Various other issues were also addressed.

tags | advisory, local, root, vulnerability, python
systems | linux, ubuntu
advisories | CVE-2019-11481, CVE-2019-11482, CVE-2019-11483, CVE-2019-11485, CVE-2019-15790
SHA-256 | 96f750c6e9b3e3e67dd29ea832ab6e5faf8732a5a2359aecf00407b69bd6837f
Ubuntu Security Notice USN-4171-2
Posted Nov 4, 2019
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4171-2 - USN-4171-1 fixed several vulnerabilities in apport. This update provides the corresponding update for Ubuntu 14.04 ESM. Kevin Backhouse discovered Apport would read its user-controlled settings file as the root user. This could be used by a local attacker to possibly crash Apport or have other unspecified consequences. Various other issues were also addressed.

tags | advisory, local, root, vulnerability
systems | linux, ubuntu
advisories | CVE-2019-11481, CVE-2019-11482, CVE-2019-11483, CVE-2019-11485, CVE-2019-15790
SHA-256 | abf66e9bb78ee4fc3f4fa2fdbc77bb1c869b824bb55a4793c42698211f58272b
Ubuntu Security Notice USN-4171-1
Posted Oct 30, 2019
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4171-1 - Kevin Backhouse discovered Apport would read its user-controlled settings file as the root user. This could be used by a local attacker to possibly crash Apport or have other unspecified consequences. Sander Bos discovered a race-condition in Apport during core dump creation. This could be used by a local attacker to generate a crash report for a privileged process that is readable by an unprivileged user. Various other issues were also addressed.

tags | advisory, local, root
systems | linux, ubuntu
advisories | CVE-2019-11481, CVE-2019-11482, CVE-2019-11483, CVE-2019-11485, CVE-2019-15790
SHA-256 | 414c77c1efcd581bccb93eb38f2173989c5cd936f5639b87bd9d281606c00e45
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