Title: Linux Kernel Local MEMLOCK RLIMIT Bypass Denial Of Service Vulnerability
Severity: MODERATE
Description:
The Linux kernel allows applications to lock allocated memory. Certain applications use this capability to ensure that memory is not swapped out of main memory and onto disk. Applications can use this to attempt to ensure that sensitive information is never written to permanent storage, so that it cannot be later retrieved by attackers. Due to the possibility of abuse, restrictions are enforced to ensure that users do not cause memory-starvation issues.
The 'linux-2.4.21-mlock.patch' for the Linux kernel contains a security vulnerability. Reports indicate that the rlimit restrictions do not correctly account for IPC (Inter-process Communications) functionality; this may result in unprivileged users having the right to mlock memory.
A local attacker may exploit this issue to deny service for legitimate users.
Affected Products:
- Conectiva Linux 9.0.0
- Linux kernel 2.4.21
- MandrakeSoft Linux Mandrake 9.1.0
- MandrakeSoft Linux Mandrake 9.1.0 ppc
- RedHat Desktop 3.0.0
- RedHat Enterprise Linux AS 3
- RedHat Enterprise Linux ES 3
- RedHat Enterprise Linux WS 3
- S.u.S.E. Linux Enterprise Server 8
- S.u.S.E. Linux Personal 9.0.0
- S.u.S.E. Linux Personal 9.0.0 x86_64
- SGI ProPack 3.0.0
- SGI ProPack 3.0.0 SP1
- SGI ProPack 3.0.0 SP2
- SGI ProPack 3.0.0 SP3
- SGI ProPack 3.0.0 SP4
- SGI ProPack 3.0.0 SP5
- SGI ProPack 3.0.0 SP6
References:
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