fedora 24
format weakness #72

4

Weakness Breakdown


Definition:

A format string exploit occurs when the data of an input string is evaluated as a command by the program. This class of attacks is very similar to buffer overflows since an attacker could execute code, read the stack or cause new behaviors that compromise security. Learn more about format string attacks on OWASP attack index.

Warning code(s):

If format strings can be influenced by an attacker, they can be exploited.

File Name:

SuperLU_4.3/TESTING/cdrive.c

Context:

The highlighted line of code below is the trigger point of this particular Fedora 24 format weakness.

 			    }

			    if ( !info ) {
				/* Compute residual of the computed solution.*/
				cCopy_Dense_Matrix(m, nrhs, bsav, ldb,
						  wwork, ldb);
				cgst02(trans, m, n, nrhs, &ASAV, solx, ldx,
					  wwork, ldb, &result[1]);

				/* Check solution from generated exact
				   solution. */
				cgst04(n, nrhs, solx, ldx, xact, ldx, rcond,
					  &result[2]);

				/* Check the error bounds from iterative
				   refinement. */
				cgst07(trans, n, nrhs, &ASAV, bsav, ldb,
					  solx, ldx, xact, ldx, ferr, berr,
					  &result[3]);

				/* Print information about the tests that did
				   not pass the threshold.    */
				for (i = k1; i < NTESTS; ++i) {
				    if ( result[i] >= THRESH ) {
					printf(FMT2, "cgssvx",
					       options.Fact, trans, *equed,
					       n, imat, i, result[i]);
					++nfail;
				    }
				}
				nrun += NTESTS;
			    } /* if .. info == 0 */
			} /* else .. end of testing cgssvx */

		    } /* for itran ... */

		    if ( lwork == 0 ) {
			Destroy_SuperNode_Matrix(&L);
			Destroy_CompCol_Matrix(&U);
		    }

		} /* for equil ... */
	    } /* for ifact ... */
	} /* for iequed ... */
#if 0    
    if ( !info ) {
	PrintPerf(&L, &U, &mem_usage, rpg, rcond, ferr, berr, equed);
    }
#endif    
 

The registered trademark Linux® is used pursuant to a sublicense from the Linux Foundation, the exclusive licensee of Linus Torvalds, owner of the mark on a world­wide basis.