CVE-2021-47245
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2021-47245
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-47245.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2021-47245
- Related
- Published
- 2024-05-21T15:15:13Z
- Modified
- 2024-09-18T01:00:21Z
- Summary
- [none]
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
netfilter: synproxy: Fix out of bounds when parsing TCP options
The TCP option parser in synproxy (synproxyparseoptions) could read one byte out of bounds. When the length is 1, the execution flow gets into the loop, reads one byte of the opcode, and if the opcode is neither TCPOPTEOL nor TCPOPTNOP, it reads one more byte, which exceeds the length of 1.
This fix is inspired by commit 9609dad263f8 ("ipv4: tcp_input: fix stack out of bounds when parsing TCP options.").
v2 changes:
Added an early return when length < 0 to avoid calling skbheaderpointer with negative length.
- References
-
- https://git.kernel.org/stable/c/576c1526b4d83c44ad7b673cb841f36cbc6cb6c4
- https://git.kernel.org/stable/c/5fc177ab759418c9537433e63301096e733fb915
- https://git.kernel.org/stable/c/674b5f0c6a4fc5d3abce877048290cea6091fcb1
- https://git.kernel.org/stable/c/6defc77d48eff74075b80ad5925061b2fc010d98
- https://git.kernel.org/stable/c/7d9a9a1a88a3da574e019b4de756bc73337b3b0b
- https://git.kernel.org/stable/c/9cdf299ba4e153b5e56187648420de22c6216f02
- https://git.kernel.org/stable/c/e1eb98cfeafdd85537e7e3cefe93ca9bfbcc3ea8
- https://git.kernel.org/stable/c/f648089337cb8ed40b2bb96e244f72b9d97dc96b
- https://security-tracker.debian.org/tracker/CVE-2021-47245
Affected packages
Debian:11 / linux
Package
- Name
- linux
- Purl
- pkg:deb/debian/linux?arch=source
Debian:12 / linux
Package
- Name
- linux
- Purl
- pkg:deb/debian/linux?arch=source
Debian:13 / linux
Package
- Name
- linux
- Purl
- pkg:deb/debian/linux?arch=source