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CVE-2019-15790

Status Candidate

Overview

Apport reads and writes information on a crashed process to /proc/pid with elevated privileges. Apport then determines which user the crashed process belongs to by reading /proc/pid through get_pid_info() in data/apport. An unprivileged user could exploit this to read information about a privileged running process by exploiting PID recycling. This information could then be used to obtain ASLR offsets for a process with an existing memory corruption vulnerability. The initial fix introduced regressions in the Python Apport library due to a missing argument in Report.add_proc_environ in apport/report.py. It also caused an autopkgtest failure when reading /proc/pid and with Python 2 compatibility by reading /proc maps. The initial and subsequent regression fixes are in 2.20.11-0ubuntu16, 2.20.11-0ubuntu8.6, 2.20.9-0ubuntu7.12, 2.20.1-0ubuntu2.22 and 2.14.1-0ubuntu3.29+esm3.

Related Files

Ubuntu Apport / Whoopsie DoS / Integer Overflow
Posted Jun 12, 2023
Authored by GitHub Security Lab

Five proof of concept exploits that encompass integer overflow and denial of service conditions in Ubuntu's Apport and Whoopsie components.

tags | exploit, denial of service, overflow, proof of concept
systems | linux, ubuntu
advisories | CVE-2019-11476, CVE-2019-11481, CVE-2019-11484, CVE-2019-15790, CVE-2019-7307
SHA-256 | 04883ffd913b86aa2c8a13bf6757fef0b0d4525b563200cbd5563f587cdfc221
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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