ppp: reject claimed-as-LCP but actually malformed packets
3Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackepss 0.3%
exploitation probability
0.3%top 81% of all CVEs
observed exploitation
nono source reports it
In the Linux kernel, the following vulnerability has been resolved:
ppp: reject claimed-as-LCP but actually malformed packets
Since 'ppp_async_encode()' assumes valid LCP packets (with code
from 1 to 7 inclusive), add 'ppp_check_packet()' to ensure that
LCP packet has an actual body beyond PPP_LCP header bytes, and
reject claimed-as-LCP but actually malformed data otherwise.
Affected products
Linux · LinuxReferences
https://git.kernel.org/stable/c/099502ca410922b56353ccef2749bc0de669da78https://git.kernel.org/stable/c/3134bdf7356ed952dcecb480861d2afcc1e40492https://git.kernel.org/stable/c/3ba12c2afd933fc1bf800f6d3f6c7ec8f602ce56https://git.kernel.org/stable/c/6e8f1c21174f9482033bbb59f13ce1a8cbe843c3https://git.kernel.org/stable/c/97d1efd8be26615ff680cdde86937d5943138f37https://git.kernel.org/stable/c/d683e7f3fc48f59576af34631b4fb07fd931343ehttps://git.kernel.org/stable/c/ebc5c630457783d17d0c438b0ad70b232a64a82fhttps://git.kernel.org/stable/c/f2aeb7306a898e1cbd03963d376f4b6656ca2b55https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html