Description
The ccid3_hc_tx_getsockopt function in net/dccp/ccids/ccid3.c in the Linux kernel before 3.6 does not initialize a certain structure, which allows local users to obtain sensitive information from kernel stack memory via a crafted application.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | linux | 3.2.30-1 | — |
| Debian 13 | linux | 3.2.30-1 | — |
| Debian 12 | linux | 3.2.30-1 | — |
References
- https://github.com/torvalds/linux/commit/7b07f8eb75aa3097cdfd4f6eac3da49db787381d
- [oss-security] 20130305 CVE Requests (maybe): Linux kernel: various info leaks, some NULL ptr derefs mailing-list
- https://www.kernel.org/pub/linux/kernel/v3.x/patch-3.6.bz2
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=7b07f8eb75aa3097cdfd4f6eac3da49db787381d