CVE-2018-6323 — The elf_object_p function in elfcode

The elf_object_p function in elfcode.h in the Binary File Descriptor (BFD) library (aka libbfd), as distributed in GNU Binutils 2.29.1, has an unsigned integer overflow because bfd_size_type multiplication is not used. A crafted ELF file allows remote attackers to cause a denial

01What is this vulnerability?

The elf_object_p function in elfcode.h in the Binary File Descriptor (BFD) library (aka libbfd), as distributed in GNU Binutils 2.29.1, has an unsigned integer overflow because bfd_size_type multiplication is not used. A crafted ELF file allows remote attackers to cause a denial of service (application crash) or possibly have unspecified other impact.

02Affected products

Vendor	Product	Versions
n	a / n/a	n/a

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2018-01-26T08:00:00.000Z
• Last modified: 2024-08-05T06:01:48.677Z

09References

• sourceware.org — https://sourceware.org/bugzilla/show_bug.cgi?id=22746
• www.securityfocus.com — http://www.securityfocus.com/bid/102821
• www.exploit-db.com — https://www.exploit-db.com/exploits/44035/
• lists.opensuse.org — http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00072.html
• lists.opensuse.org — http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00008.html