lobroco 0.6.12 CSS File cr-tknzr.c cr_tknzr_parse_comment memory corruption

Summaryinfo

A vulnerability has been found in lobroco 0.6.12 and classified as problematic. This affects the function cr_tknzr_parse_comment of the file cr-tknzr.c of the component CSS File Handler. Performing a manipulation results in memory corruption. This vulnerability is identified as CVE-2017-8834. The attack can be initiated remotely. Additionally, an exploit exists.

Detailsinfo

A vulnerability classified as problematic has been found in lobroco 0.6.12. This affects the function cr_tknzr_parse_comment of the file cr-tknzr.c of the component CSS File Handler. The manipulation with an unknown input leads to a memory corruption vulnerability. CWE is classifying the issue as CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. This is going to have an impact on availability. The summary by CVE is:

The cr_tknzr_parse_comment function in cr-tknzr.c in libcroco 0.6.12 allows remote attackers to cause a denial of service (memory allocation error) via a crafted CSS file.

The bug was discovered 06/07/2017. The weakness was released 06/12/2017 as EDB-ID 42147 as not defined exploit (Exploit-DB). It is possible to read the advisory at exploit-db.com. This vulnerability is uniquely identified as CVE-2017-8834 since 05/08/2017. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. Technical details and a public exploit are known.

The exploit is shared for download at exploit-db.com. It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 5 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 172445 (SUSE Enterprise Linux Security Update for libcroco (SUSE-SU-2019:1468-1)).

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 Exploit-DB (42147). Entries connected to this vulnerability are available at VDB-100259, VDB-100260 and VDB-102232. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Name

• lobroco

Version

• 0.6.12

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CPE 2.2info

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Be aware that VulDB is the high quality source for vulnerability data.

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