#VU92520 Cryptographic issues in Linux kernel - CVE-2013-2548

Vulnerability identifier: #VU92520

Vulnerability risk: Low

CVSSv4.0: 1.1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2013-2548

CWE-ID: CWE-310

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Linux kernel
Operating systems & Components / Operating system

Vendor: Linux Foundation

Description

The vulnerability allows a local user to gain access to sensitive information.

The vulnerability exists due to cryptographic issues error within the crypto_shash_report() function in crypto/shash.c, within the crypto_rng_report() function in crypto/rng.c, within the crypto_pcomp_report() function in crypto/pcompress.c, within the crypto_report_cipher(), crypto_report_comp() and crypto_report_one() functions in crypto/crypto_user.c, within the crypto_blkcipher_report() function in crypto/blkcipher.c, within the crypto_ahash_report() function in crypto/ahash.c, within the crypto_aead_report() and crypto_nivaead_report() functions in crypto/aead.c, within the crypto_ablkcipher_report() and crypto_givcipher_report() functions in crypto/ablkcipher.c. A local user can gain access to sensitive information.

Mitigation
Install update from vendor's repository.

Vulnerable software versions

Linux kernel: All versions

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External links
https://github.com/torvalds/linux/commit/9a5467bf7b6e9e02ec9c3da4e23747c05faeaac6
https://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=9a5467bf7b6e9e02ec9c3da4e23747c05faeaac6
https://www.openwall.com/lists/oss-security/2013/03/05/13
https://www.ubuntu.com/usn/USN-1795-1
https://www.ubuntu.com/usn/USN-1796-1
https://www.ubuntu.com/usn/USN-1793-1
https://www.ubuntu.com/usn/USN-1794-1
https://www.ubuntu.com/usn/USN-1797-1
https://www.mandriva.com/security/advisories?name=MDVSA-2013:176
https://lists.opensuse.org/opensuse-updates/2013-12/msg00129.html

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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.