Description
In the Linux kernel, the following vulnerability has been resolved: netfilter: nfnetlink_osf: fix potential NULL dereference in ttl check The nf_osf_ttl() function accessed skb->dev to perform a local interface address lookup without verifying that the device pointer was valid. Additionally, the implementation utilized an in_dev_for_each_ifa_rcu loop to match the packet source address against local interface addresses. It assumed that packets from the same subnet should not see a decrement on the initial TTL. A packet might appear it is from the same subnet but it actually isn't especially in modern environments with containers and virtual switching. Remove the device dereference and interface loop. Replace the logic with a switch statement that evaluates the TTL according to the ttl_check.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
11eeef41d5f63c7d2f7fdfcc733eb7fb137cc384 to < f4de0777e4554a7de19c920accde6319dd530782affected11eeef41d5f63c7d2f7fdfcc733eb7fb137cc384 to < c996a90f3071cf43683e5423da31aadbe002b8b4affected11eeef41d5f63c7d2f7fdfcc733eb7fb137cc384 to < edc806f9122961f0d3819f7c69c14cccde31f277affected11eeef41d5f63c7d2f7fdfcc733eb7fb137cc384 to < 5d05de2f0928d81309a815ecc76d1a3ad72cbc16affected11eeef41d5f63c7d2f7fdfcc733eb7fb137cc384 to < 95be653a76793856ff8b2d8bd82c2943c23f5ca8affected11eeef41d5f63c7d2f7fdfcc733eb7fb137cc384 to < 79b90a96688e521771fa6ed3dc7864b76b8df293affected11eeef41d5f63c7d2f7fdfcc733eb7fb137cc384 to < 83fc5dd63455a779ea2dd0f7ffee3c920919d80baffected11eeef41d5f63c7d2f7fdfcc733eb7fb137cc384 to < 711987ba281fd806322a7cd244e98e2a81903114affected
Linux Linux
Default version status: affected
2.6.31affected0 to < 2.6.31unaffected5.10.258 to ≤ 5.10.*unaffected5.15.209 to ≤ 5.15.*unaffected6.1.175 to ≤ 6.1.*unaffected6.6.141 to ≤ 6.6.*unaffected6.12.91 to ≤ 6.12.*unaffected6.18.33 to ≤ 6.18.*unaffected7.0.10 to ≤ 7.0.*unaffected7.1 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/f4de0777e4554a7de19c920accde6319dd530782 ↗
- https://git.kernel.org/stable/c/c996a90f3071cf43683e5423da31aadbe002b8b4 ↗
- https://git.kernel.org/stable/c/edc806f9122961f0d3819f7c69c14cccde31f277 ↗
- https://git.kernel.org/stable/c/5d05de2f0928d81309a815ecc76d1a3ad72cbc16 ↗
- https://git.kernel.org/stable/c/95be653a76793856ff8b2d8bd82c2943c23f5ca8 ↗
- https://git.kernel.org/stable/c/79b90a96688e521771fa6ed3dc7864b76b8df293 ↗
- https://git.kernel.org/stable/c/83fc5dd63455a779ea2dd0f7ffee3c920919d80b ↗
- https://git.kernel.org/stable/c/711987ba281fd806322a7cd244e98e2a81903114 ↗
- https://cert-portal.siemens.com/productcert/html/ssa-019113.html ↗
- https://cert-portal.siemens.com/productcert/html/ssa-457936.html ↗