Entreprise française de cybersécurité depuis 2004
☎ 03 60 47 09 81 - info@securiteinfo.com
☎ 03 60 47 09 81 - info@securiteinfo.com
In the Linux kernel, the following vulnerability has been resolved:net_sched: sch_sfq: reject invalid perturb periodGerrard Tai reported that SFQ perturb_period has no range check yet,and this can be used to trigger a race condition fixed in a separate patch.We want to make sure ctl->perturb_period * HZ will not overflowand is positive.tc qd add dev lo root sfq perturb -10 # negative value : errorError: sch_sfq: invalid perturb period.tc qd add dev lo root sfq perturb 1000000000 # too big : errorError: sch_sfq: invalid perturb period.tc qd add dev lo root sfq perturb 2000000 # acceptable valuetc -s -d qd sh dev loqdisc sfq 8005: root refcnt 2 limit 127p quantum 64Kb depth 127 flows 128 divisor 1024 perturb 2000000sec Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0) backlog 0b 0p requeues 0
No PoCs from references.
- https://github.com/w4zu/Debian_security