net/mdiobus: Fix potential out-of-bounds clause 45 read/write access
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 6.6.94, 6.12.34, 6.15.3
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
- Exploitation: none
- Automatable: no
- Technical impact: total
Summary
In the Linux kernel, the following vulnerability has been resolved: net/mdiobus: Fix potential out-of-bounds clause 45 read/write access When using publicly available tools like 'mdio-tools' to read/write data from/to network interface and its PHY via C45 (clause 45) mdiobus, there is no verification of parameters passed to the ioctl and it accepts any mdio address. Currently there is support for 32 addresses in kernel via PHY_MAX_ADDR define, but it is possible to pass higher value than that via ioctl. While read/write operation should generally fail in this case, mdiobus provides stats array, where wrong address may allow out-of-bounds read/write. Fix that by adding address verification before C45 read/write operation. While this excludes this access from any statistics, it improves security of read/write operation.
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: none · Automatable: no · Technical impact: total
- Record last updated
Affected versions
- Linux Linux
From 4e4aafcddbbfcdd6eed5780e190fcbfac8b4685a · fixed in abb0605ca00979a49572a6516f6db22c3dc57223; From 4e4aafcddbbfcdd6eed5780e190fcbfac8b4685a · fixed in 31bf7b2b92563a352788cf9df3698682f659bacc; From 4e4aafcddbbfcdd6eed5780e190fcbfac8b4685a · fixed in 4ded22f7f3ce9714ed72c3e9c68fea1cb9388ae7; From 4e4aafcddbbfcdd6eed5780e190fcbfac8b4685a · fixed in 260388f79e94fb3026c419a208ece8358bb7b555
- Linux Linux
6.3
- KernelLinux
From 6.3.0 · fixed in 6.6.94; From 6.7.0 · fixed in 6.12.34; From 6.13.0 · fixed in 6.15.3