In the Linux kernel, the following vulnerability has been resolved:
smb: client: validate dacloffset before building DACL pointers
parse_sec_desc(), build_sec_desc(), and the chown path in
id_mode_to_cifs_acl() all add the server-supplied dacloffset to pntsd
before proving a DACL header fits inside the returned security
descriptor.
On 32-bit builds a malicious server can return dacloffset near
U32_MAX, wrap the derived DACL pointer below end_of_acl, and then slip
past the later pointer-based bounds checks. build_sec_desc() and
id_mode_to_cifs_acl() can then dereference DACL fields from the wrapped
pointer in the chmod/chown rewrite paths.
Validate dacloffset numerically before building any DACL pointer and
reuse the same helper at the three DACL entry points.
from bc3e9dd9d104ca1b75644eab87b38ce8a924aef4 before 5de2665e913a10ad70aaeecf736b97276e83d995; from bc3e9dd9d104ca1b75644eab87b38ce8a924aef4 before f9dc3be8f403c1216df73e57221f44b045e7ee0b; from bc3e9dd9d104ca1b75644eab87b38ce8a924aef4 before ba7f71b6161c0943dafc367565e5843d16b7d505; from bc3e9dd9d104ca1b75644eab87b38ce8a924aef4 before 3b1ddba19e77ee35241cd27f16dc3e8d14e08db7; from bc3e9dd9d104ca1b75644eab87b38ce8a924aef4 before c688f3ed73d31943334ad2139cb02ec49664322a; from bc3e9dd9d104ca1b75644eab87b38ce8a924aef4 before 8bd07e417b6bda67e317920584e48cb6ee442a8a; from bc3e9dd9d104ca1b75644eab87b38ce8a924aef4 before f98b48151cc502ada59d9778f0112d21f2586ca3
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.
Printed from infosecsignals.com. Every record links back to the agency that published it.
Your cookie choices
We use essential cookies to run this site, and, only with your consent, an advertising cookie from Google to measure whether our ads lead to sign-ups and subscriptions. See our for details.
