GNU elfutils 0.175 dwarf_getsrclines.c read_srclines out-of-bounds

Summaryinfo

A vulnerability has been found in GNU elfutils 0.175 and classified as critical. The affected element is the function read_srclines of the file dwarf_getsrclines.c. The manipulation leads to out-of-bounds. This vulnerability is documented as CVE-2019-7149. The attack can be initiated remotely. There is not any exploit available.

Detailsinfo

A vulnerability was found in GNU elfutils 0.175. It has been rated as critical. This issue affects the function read_srclines of the file dwarf_getsrclines.c. The manipulation with an unknown input leads to a out-of-bounds vulnerability. Using CWE to declare the problem leads to CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

A heap-based buffer over-read was discovered in the function read_srclines in dwarf_getsrclines.c in libdw in elfutils 0.175. A crafted input can cause segmentation faults, leading to denial-of-service, as demonstrated by eu-nm.

The bug was discovered 01/22/2019. The weakness was released 01/29/2019 by Agostino Sarubbo with Gentoo (Website). The advisory is shared at sourceware.org. The identification of this vulnerability is CVE-2019-7149 since 01/28/2019. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. It demands that the victim is doing some kind of user interaction. Technical details are known, but no exploit is available.

The vulnerability was handled as a non-public zero-day exploit for at least 6 days. During that time the estimated underground price was around $0-$5k. The commercial vulnerability scanner Qualys is able to test this issue with plugin 277651 (Fedora Security Update for elfutils (FEDORA-2019-44a9d99647)).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at SecurityFocus (BID 98609†). Entries connected to this vulnerability are available at VDB-99467, VDB-99469, VDB-99470 and VDB-99471. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Vendor

• GNU

Name

• elfutils

Version

• 0.175

License

• open-source

Website

• Vendor: https://www.gnu.org/

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Entryinfo

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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