CVE-2018-20836 — Vulnetix

CVE-2018-20836 PUBLISHED

An issue was discovered in the Linux kernel before 4.20. There is a race condition in smp_task_timedout() and smp_task_done() in drivers/scsi/libsas/sas_expander.c, leading to a use-after-free.

EPSS 4.06% · 88.7th percentile

Risk Scores

EPSS Score

4.06%

88.7th percentile

Affected Products

Vendor	Product	Versions
Ubuntu:18.04:LTS	linux-snapdragon	4.4.0-1079.84, 4.4.0-1078.83, 4.4.0-1077.82
Ubuntu:16.04:LTS	linux-raspi2	4.4.0-1095.103, 4.4.0-1091.99, 4.4.0-1090.98
Ubuntu:16.04:LTS	linux-gcp	4.13.0-1002.5, 4.13.0-1017.21, *
Ubuntu:18.04:LTS	linux	4.15.0-42.45, 4.15.0-39.42, 4.15.0-38.41
Ubuntu:18.04:LTS	linux-aws	4.15.0-1011.11, 4.15.0-1009.9, 4.15.0-1016.16
Ubuntu:18.04:LTS	linux-hwe	0, 4.18.0-13.14~18.04.1
Ubuntu:16.04:LTS	linux	4.4.0-121.145, 4.4.0-13.29, 4.4.0-154.181
Ubuntu:20.04:LTS	linux-raspi2	0, 5.3.0-1007.8, 5.4.0-1006.6
Ubuntu:16.04:LTS	linux-kvm	4.4.0-1033.39, 4.4.0-1032.38, 4.4.0-1031.37
Ubuntu:Pro:14.04:LTS	linux-aws	4.4.0-1050.54, 4.4.0-1048.52, 4.4.0-1046.50
Ubuntu:18.04:LTS	linux-kvm	4.15.0-1008.8, 4.15.0-1011.11, 4.15.0-1012.12
Ubuntu:16.04:LTS	linux-aws	4.4.0-1062.71, 4.4.0-1061.70, 4.4.0-1060.69
Ubuntu:16.04:LTS	linux-hwe	4.13.0-36.40~16.04.1, 0, 4.8.0-39.42~16.04.1
Ubuntu:Pro:14.04:LTS	linux	3.13.0-46.77, 3.13.0-198.249, 3.13.0-199.250
Ubuntu:22.04:LTS	linux-riscv	5.15.0-1004.4, 5.15.0-1018.21, 5.15.0-1022.26
Ubuntu:18.04:LTS	linux-gcp-edge	0, 4.18.0-1004.5~18.04.1, 4.18.0-1005.6~18.04.1
Ubuntu:Pro:FIPS:16.04:LTS	linux-fips	4.4.0-1012.16, 4.4.0-1013.17, 4.4.0-1006.6
Ubuntu:20.04:LTS	linux-gke	5.4.0-1039.41, 0, 5.4.0-1033.35
Ubuntu:14.04:LTS	linux-azure	*, 0, 4.15.0-1023.24~14.04.1
Ubuntu:18.04:LTS	linux-oem	4.15.0-1006.9, 4.15.0-1028.33, 4.15.0-1021.24

…and 12 more

Exploit Intelligence

CVE-2008-5161 OpenSSH 4.7p1 Audit Helper Automates version checking and credential auditing of legacy OpenSSH 4.7p1 (Debian-8ubuntu1) targets by driving Metasploit’s auxiliary/scanner/ssh/ssh_login module from Python via pwntools. (github-poc)
CVE-2008-5161 OpenSSH 4.7p1 Audit Helper Automates version checking and credential auditing of legacy OpenSSH 4.7p1 (Debian-8ubuntu1) targets by driving Metasploit’s auxiliary/scanner/ssh/ssh_login module from Python via pwntools. (github-poc)
CVE-2008-5161 OpenSSH 4.7p1 Audit Helper Automates version checking and credential auditing of legacy OpenSSH 4.7p1 (Debian-8ubuntu1) targets by driving Metasploit’s auxiliary/scanner/ssh/ssh_login module from Python via pwntools. (github-poc)
CVE-2008-5161 OpenSSH 4.7p1 Audit Helper Automates version checking and credential auditing of legacy OpenSSH 4.7p1 (Debian-8ubuntu1) targets by driving Metasploit’s auxiliary/scanner/ssh/ssh_login module from Python via pwntools. (github-poc)
CVE-2008-5161 OpenSSH 4.7p1 Audit Helper Automates version checking and credential auditing of legacy OpenSSH 4.7p1 (Debian-8ubuntu1) targets by driving Metasploit’s auxiliary/scanner/ssh/ssh_login module from Python via pwntools. (github-poc)
CVE-2008-5161 OpenSSH 4.7p1 Audit Helper Automates version checking and credential auditing of legacy OpenSSH 4.7p1 (Debian-8ubuntu1) targets by driving Metasploit’s auxiliary/scanner/ssh/ssh_login module from Python via pwntools. (github-poc)

Timeline

May 7, 2019 CVE Published
Apr 14, 2021 EPSS Score
Jun 23, 2021 EPSS Score
Oct 26, 2021 EPSS Score
Dec 27, 2021 EPSS Score
May 2, 2022 EPSS Score
Jul 3, 2022 EPSS Score
Sep 5, 2022 EPSS Score
Nov 6, 2022 EPSS Score
Dec 29, 2022 EPSS Score
Jan 8, 2023 EPSS Score
Mar 7, 2023 EPSS Score

References

https://ubuntu.com/security/CVE-2018-20836 third-party-advisory
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=b90cd6f2b905905fb42671009dc0e27c310a16ae third-party-advisory
https://ubuntu.com/security/notices/USN-4076-1 vendor-advisory
https://www.cve.org/CVERecord?id=CVE-2018-20836 third-party-advisory

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