CVE-2019-14815

A vulnerability was found in Linux Kernel, where a Heap Overflow was found in mwifiex_set_wmm_params() function of Marvell Wifi Driver.

Weakness

A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().

Affected Software

Potential Mitigations

• Use automatic buffer overflow detection mechanisms that are offered by certain compilers or compiler extensions. Examples include: the Microsoft Visual Studio /GS flag, Fedora/Red Hat FORTIFY_SOURCE GCC flag, StackGuard, and ProPolice, which provide various mechanisms including canary-based detection and range/index checking.
• D3-SFCV (Stack Frame Canary Validation) from D3FEND [REF-1334] discusses canary-based detection in detail.
• Run or compile the software using features or extensions that randomly arrange the positions of a program’s executable and libraries in memory. Because this makes the addresses unpredictable, it can prevent an attacker from reliably jumping to exploitable code.
• Examples include Address Space Layout Randomization (ASLR) [REF-58] [REF-60] and Position-Independent Executables (PIE) [REF-64]. Imported modules may be similarly realigned if their default memory addresses conflict with other modules, in a process known as “rebasing” (for Windows) and “prelinking” (for Linux) [REF-1332] using randomly generated addresses. ASLR for libraries cannot be used in conjunction with prelink since it would require relocating the libraries at run-time, defeating the whole purpose of prelinking.
• For more information on these techniques see D3-SAOR (Segment Address Offset Randomization) from D3FEND [REF-1335].

Related Attack Patterns

• https://cwe.mitre.org/data/definitions/92.html

References

• https://access.redhat.com/errata/RHSA-2020:0174
• https://access.redhat.com/errata/RHSA-2020:0328
• https://access.redhat.com/errata/RHSA-2020:0339
• https://access.redhat.com/security/cve/cve-2019-14815
• https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-14815
• https://github.com/torvalds/linux/commit/7caac62ed598a196d6ddf8d9c121e12e082cac3a
• https://lists.debian.org/debian-lts-announce/2020/03/msg00001.html
• https://lore.kernel.org/linux-wireless/20190828020751.13625-1-huangwenabc%40gmail.com
• https://security.netapp.com/advisory/ntap-20200103-0001/
• https://www.openwall.com/lists/oss-security/2019/08/28/1