Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: rxrpc: proc: size address buffers for %pISpc output The AF_RXRPC procfs helpers format local and remote socket addresses into fixed 50-byte stack buffers with "%pISpc". That is too small for the longest current-tree IPv6-with-port form the formatter can produce. In lib/vsprintf.c, the compressed IPv6 path uses a dotted-quad tail not only for v4mapped addresses, but also for ISATAP addresses via ipv6_addr_is_isatap(). As a result, a case such as [ffff:ffff:ffff:ffff:0:5efe:255.255.255.255]:65535 is possible with the current formatter. That is 50 visible characters, so 51 bytes including the trailing NUL, which does not fit in the existing char[50] buffers used by net/rxrpc/proc.c. Size the buffers from the formatter's maximum textual form and switch the call sites to scnprintf(). Changes since v1: - correct the changelog to cite the actual maximum current-tree case explicitly - frame the proof around the ISATAP formatting path instead of the earlier mapped-v4 example
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 75b54cb57ca34cbe7a87c6ac757c55360a624590 before 386c86412608d3449006a318a662cbcd6ca1f668; affected 75b54cb57ca34cbe7a87c6ac757c55360a624590 before 235b2115de892eab2e107a42efa7a4347baaa80b; affected 75b54cb57ca34cbe7a87c6ac757c55360a624590 before 625af53a1564e31bb2df9adc3739df46137f46c1; affected 75b54cb57ca34cbe7a87c6ac757c55360a624590 before 808a34cdbe8ce336c202d8ea6d5e48496764dc37; affected 75b54cb57ca34cbe7a87c6ac757c55360a624590 before a6042b8066b24dbcc7945616a157d4d43e463668; affected 75b54cb57ca34cbe7a87c6ac757c55360a624590 before db297c78ce537c9ac96f0eda9b25ad72c8caefa9; affected 75b54cb57ca34cbe7a87c6ac757c55360a624590 before 10ebed83f9f6414af4e85bc85ffaeda7effdd874; affected 75b54cb57ca34cbe7a87c6ac757c55360a624590 before a44ce6aa2efb61fe44f2cfab72bb01544bbca272 |
| Linux / Linux | affected 4.9; unaffected 0 before 4.9; unaffected 5.10.258 through 5.10.*; unaffected 5.15.209 through 5.15.*; unaffected 6.1.175 through 6.1.*; unaffected 6.6.160 through 6.6.*; unaffected 6.12.114 through 6.12.*; unaffected 6.18.23 through 6.18.*; unaffected 6.19.13 through 6.19.*; unaffected 7.0 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/386c86412608d3449006a318a662cbcd6ca1f668
- https://git.kernel.org/stable/c/235b2115de892eab2e107a42efa7a4347baaa80b
- https://git.kernel.org/stable/c/625af53a1564e31bb2df9adc3739df46137f46c1
- https://git.kernel.org/stable/c/808a34cdbe8ce336c202d8ea6d5e48496764dc37
- https://git.kernel.org/stable/c/a6042b8066b24dbcc7945616a157d4d43e463668
- https://git.kernel.org/stable/c/db297c78ce537c9ac96f0eda9b25ad72c8caefa9
- https://git.kernel.org/stable/c/10ebed83f9f6414af4e85bc85ffaeda7effdd874
- https://git.kernel.org/stable/c/a44ce6aa2efb61fe44f2cfab72bb01544bbca272
ADP enrichment
No English description supplied.
No English description supplied.
No references supplied.