#VU33388 Buffer overflow - CVE-2019-12802

Vulnerability identifier: #VU33388

Vulnerability risk: Low

CVSSv4.0: 5.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2019-12802

CWE-ID: CWE-119

Exploitation vector: Local

Exploit availability: No

Description

The vulnerability allows a local non-authenticated attacker to execute arbitrary code.

In radare2 through 3.5.1, the rcc_context function of libr/egg/egg_lang.c mishandles changing context. This allows remote attackers to cause a denial of service (application crash) or possibly have unspecified other impact (invalid memory access in r_egg_lang_parsechar; invalid free in rcc_pusharg).

Mitigation
Install update from vendor's website.

External links
https://github.com/radare/radare2/issues/14296
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/IEXZWAMVKGZKHALV4IVWQS2ORJKRH57U/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/SX4TLTE75VYUGSPYEKMYFPUZMRDIR7O2/

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.