A flaw was found in the JFS filesystem code in the Linux Kernel which allows a local attacker with the ability to set extended attributes to panic the system, causing memory corruption or escalating privileges. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.
The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.
The product writes data past the end, or before the beginning, of the intended buffer.
| Link | Tags |
|---|---|
| http://www.openwall.com/lists/oss-security/2020/11/30/5 | mailing list exploit third party advisory |
| http://www.openwall.com/lists/oss-security/2020/12/28/1 | mailing list patch exploit third party advisory |
| https://www.debian.org/security/2021/dsa-4843 | third party advisory vendor advisory |
| https://lists.debian.org/debian-lts-announce/2021/02/msg00018.html | third party advisory mailing list |
| https://lists.debian.org/debian-lts-announce/2021/03/msg00010.html | third party advisory mailing list |
| https://bugzilla.redhat.com/show_bug.cgi?id=1897668%2C | issue tracking |
| https://www.openwall.com/lists/oss-security/2020/11/30/5%2C | mailing list |
| https://www.openwall.com/lists/oss-security/2020/12/28/1%2C | mailing list |
| https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c61b3e4839007668360ed8b87d7da96d2e59fc6c | patch vendor advisory |
| https://security.netapp.com/advisory/ntap-20210702-0004/ | third party advisory |