libexif project security advisory July 12, 2012 PROBLEM DESCRIPTION A number of remotely exploitable issues were discovered in libexif and exif, with effects ranging from information leakage to potential remote code execution. The issues are: CVE-2012-2812: A heap-based out-of-bounds array read in the exif_entry_get_value function in libexif/exif-entry.c in libexif 0.6.20 and earlier allows remote attackers to cause a denial of service or possibly obtain potentially sensitive information from process memory via an image with crafted EXIF tags. CVE-2012-2813: A heap-based out-of-bounds array read in the exif_convert_utf16_to_utf8 function in libexif/exif-entry.c in libexif 0.6.20 and earlier allows remote attackers to cause a denial of service or possibly obtain potentially sensitive information from process memory via an image with crafted EXIF tags. CVE-2012-2814: A buffer overflow in the exif_entry_format_value function in libexif/exif-entry.c in libexif 0.6.20 allows remote attackers to cause a denial of service or possibly execute arbitrary code via an image with crafted EXIF tags. CVE-2012-2836: A heap-based out-of-bounds array read in the exif_data_load_data function in libexif 0.6.20 and earlier allows remote attackers to cause a denial of service or possibly obtain potentially sensitive information from process memory via an image with crafted EXIF tags. CVE-2012-2837: A divide-by-zero error in the mnote_olympus_entry_get_value function while formatting EXIF maker note tags in libexif 0.6.20 and earlier allows remote attackers to cause a denial of service via an image with crafted EXIF tags. CVE-2012-2840:An off-by-one error in the exif_convert_utf16_to_utf8 function in libexif/exif-entry.c in libexif 0.6.20 and earlier allows remote attackers to cause a denial of service or possibly execute arbitrary code via an image with crafted EXIF tags. CVE-2012-2841: An integer underflow in the exif_entry_get_value function can cause a heap overflow and potentially arbitrary code execution while formatting an EXIF tag, if the function is called with a buffer size parameter equal to zero or one. CVE-2012-2845: An integer overflow in the function jpeg_data_load_data in the exif program could cause a data read beyond the end of a buffer, causing an application crash or leakage of potentially sensitive information when parsing a crafted JPEG file. There are no known public exploits of these issues. AFFECTED VERSIONS All of the described vulnerabilities affect libexif version 0.6.20, and most affect earlier versions as well. SOLUTION Upgrade to version 0.6.21 which is not vulnerable to these issues. CHECKSUMS Here are the MD5 sums of the released files: 0e744471b8c3b3b1534d5af38bbf6408 exif-0.6.21.tar.bz2 78b9f501fc19c6690ebd655385cd5ad6 exif-0.6.21.tar.gz 27339b89850f28c8f1c237f233e05b27 libexif-0.6.21.tar.bz2 9321c409a3e588d4a99d63063ef4bbb7 libexif-0.6.21.tar.gz aa208b40c853792ba57fbdc1eafcdc95 libexif-0.6.21.zip Here are the SHA1 sums of the released files: 74652e3d04d0faf9ab856949d7463988f0394db8 exif-0.6.21.tar.bz2 d23139d26226b70c66d035bbc64482792c9f1101 exif-0.6.21.tar.gz a52219b12dbc8d33fc096468591170fda71316c0 libexif-0.6.21.tar.bz2 4106f02eb5f075da4594769b04c87f59e9f3b931 libexif-0.6.21.tar.gz e5990860e9ec5a6aedde0552507a583afa989ca2 libexif-0.6.21.zip ACKNOWLEDGEMENTS Mateusz Jurczyk of Google Security Team reported the issues CVE-2012-2812, CVE-2012-2813 and CVE-2012-2814. Yunho Kim reported the issues CVE-2012-2836 and CVE-2012-2837. Dan Fandrich discovered the issues CVE-2012-2840, CVE-2012-2841 and CVE-2012-2845. REFERENCES http://libexif.sf.net