CVE-2024-50195

Summary

In the Linux kernel, the following vulnerability has been resolved:

posix-clock: Fix missing timespec64 check in pc_clock_settime()

As Andrew pointed out, it will make sense that the PTP core checked timespec64 struct's tv_sec and tv_nsec range before calling ptp->info->settime64().

As the man manual of clock_settime() said, if tp.tv_sec is negative or tp.tv_nsec is outside the range [0..999,999,999], it should return EINVAL, which include dynamic clocks which handles PTP clock, and the condition is consistent with timespec64_valid(). As Thomas suggested, timespec64_valid() only check the timespec is valid, but not ensure that the time is in a valid range, so check it ahead using timespec64_valid_strict() in pc_clock_settime() and return -EINVAL if not valid.

There are some drivers that use tp->tv_sec and tp->tv_nsec directly to write registers without validity checks and assume that the higher layer has checked it, which is dangerous and will benefit from this, such as hclge_ptp_settime(), igb_ptp_settime_i210(), _rcar_gen4_ptp_settime(), and some drivers can remove the checks of itself.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux0606f422b453f76c31ab2b1bd52943ff06a2dcf2 < 29f085345cde24566efb751f39e5d367c381c584affected
LinuxLinux0606f422b453f76c31ab2b1bd52943ff06a2dcf2 < e0c966bd3e31911b57ef76cec4c5796ebd88e512affected
LinuxLinux0606f422b453f76c31ab2b1bd52943ff06a2dcf2 < 673a1c5a2998acbd429d6286e6cad10f17f4f073affected
LinuxLinux0606f422b453f76c31ab2b1bd52943ff06a2dcf2 < c8789fbe2bbf75845e45302cba6ffa44e1884d01affected
LinuxLinux0606f422b453f76c31ab2b1bd52943ff06a2dcf2 < 27abbde44b6e71ee3891de13e1a228aa7ce95bfeaffected
LinuxLinux0606f422b453f76c31ab2b1bd52943ff06a2dcf2 < a3f169e398215e71361774d13bf91a0101283ac2affected
LinuxLinux0606f422b453f76c31ab2b1bd52943ff06a2dcf2 < 1ff7247101af723731ea42ed565d54fb8f341264affected
LinuxLinux0606f422b453f76c31ab2b1bd52943ff06a2dcf2 < d8794ac20a299b647ba9958f6d657051fc51a540affected
LinuxLinux2.6.39affected
LinuxLinux0 < 2.6.39unaffected
LinuxLinux4.19.323 <= 4.19.*unaffected
LinuxLinux5.4.285 <= 5.4.*unaffected
LinuxLinux5.10.228 <= 5.10.*unaffected
LinuxLinux5.15.169 <= 5.15.*unaffected
LinuxLinux6.1.114 <= 6.1.*unaffected
LinuxLinux6.6.58 <= 6.6.*unaffected
LinuxLinux6.11.5 <= 6.11.*unaffected
LinuxLinux6.12 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

CVE Program Container

Additional References

References